KB4493509: Windows 10 Version 1809 and Windows Server 2019 April 2019 Security Update - Nessus

High   Plugin ID: 123948

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This page contains detailed information about the KB4493509: Windows 10 Version 1809 and Windows Server 2019 April 2019 Security Update Nessus plugin including available exploits and PoCs found on GitHub, in Metasploit or Exploit-DB for verifying of this vulnerability.

Plugin Overview

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ID: 123948
Name: KB4493509: Windows 10 Version 1809 and Windows Server 2019 April 2019 Security Update
Filename: smb_nt_ms19_apr_4493509.nasl
Vulnerability Published: 2019-04-09
This Plugin Published: 2019-04-09
Last Modification Time: 2022-03-28
Plugin Version: 1.16
Plugin Type: local
Plugin Family: Windows : Microsoft Bulletins
Dependencies: ms_bulletin_checks_possible.nasl, smb_check_rollup.nasl, smb_hotfixes.nasl
Required KB Items [?]: SMB/MS_Bulletin_Checks/Possible

Vulnerability Information

---

Severity: High
Vulnerability Published: 2019-04-09
Patch Published: 2019-04-09
CVE [?]: CVE-2019-0685, CVE-2019-0688, CVE-2019-0730, CVE-2019-0731, CVE-2019-0732, CVE-2019-0735, CVE-2019-0739, CVE-2019-0752, CVE-2019-0753, CVE-2019-0764, CVE-2019-0786, CVE-2019-0790, CVE-2019-0791, CVE-2019-0792, CVE-2019-0793, CVE-2019-0794, CVE-2019-0795, CVE-2019-0796, CVE-2019-0802, CVE-2019-0803, CVE-2019-0805, CVE-2019-0806, CVE-2019-0810, CVE-2019-0812, CVE-2019-0814, CVE-2019-0829, CVE-2019-0833, CVE-2019-0835, CVE-2019-0836, CVE-2019-0838, CVE-2019-0839, CVE-2019-0840, CVE-2019-0841, CVE-2019-0842, CVE-2019-0844, CVE-2019-0845, CVE-2019-0846, CVE-2019-0847, CVE-2019-0848, CVE-2019-0849, CVE-2019-0851, CVE-2019-0853, CVE-2019-0856, CVE-2019-0859, CVE-2019-0860, CVE-2019-0861, CVE-2019-0862, CVE-2019-0877, CVE-2019-0879
CPE [?]: cpe:/a:microsoft:edge, cpe:/o:microsoft:windows
Exploited by Malware: True

Synopsis

The remote Windows host is affected by multiple vulnerabilities.

Description

The remote Windows host is missing security update 4493509. It is, therefore, affected by multiple vulnerabilities :

- A security feature bypass vulnerability exists in Windows which could allow an attacker to bypass Device Guard when Windows improperly handles calls to the LUAFV driver (luafv.sys). An attacker who successfully exploited this vulnerability could circumvent a User Mode Code Integrity (UMCI) policy on the machine. (CVE-2019-0732)

- An information disclosure vulnerability exists when the Terminal Services component improperly discloses the contents of its memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise a users system. (CVE-2019-0839)

- An information disclosure vulnerability exists when the Windows TCP/IP stack improperly handles fragmented IP packets. An attacker who successfully exploited this vulnerability could obtain information to further compromise the users system. (CVE-2019-0688)

- An information disclosure vulnerability exists when the Windows kernel improperly handles objects in memory. An attacker who successfully exploited this vulnerability could obtain information to further compromise the users system. (CVE-2019-0840, CVE-2019-0844)

- A tampering vulnerability exists when Microsoft browsers do not properly validate input under specific conditions. An attacker who exploited the vulnerability could pass custom command line parameters. (CVE-2019-0764)

- An elevation of privilege vulnerability exists when Windows improperly handles calls to the LUAFV driver (luafv.sys). An attacker who successfully exploited this vulnerability could run arbitrary code in the security context of the local system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0730, CVE-2019-0731, CVE-2019-0805, CVE-2019-0836)

- A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. (CVE-2019-0752, CVE-2019-0753, CVE-2019-0862)

- An information disclosure vulnerability exists when the Windows GDI component improperly discloses the contents of its memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. There are multiple ways an attacker could exploit the vulnerability, such as by convincing a user to open a specially crafted document, or by convincing a user to visit an untrusted webpage. The security update addresses the vulnerability by correcting how the Windows GDI component handles objects in memory. (CVE-2019-0802, CVE-2019-0849)

- A remote code execution vulnerability exists when OLE automation improperly handles objects in memory. An attacker who successfully exploited the vulnerability could gain execution on the victim system. (CVE-2019-0794)

- A remote code execution vulnerability exists when the IOleCvt interface renders ASP webpage content. An attacker who successfully exploited the vulnerability could run malicious code remotely to take control of the users system. (CVE-2019-0845)

- A remote code execution vulnerability exists in the way that the Windows Graphics Device Interface (GDI) handles objects in the memory. An attacker who successfully exploited this vulnerability could take control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0853)

- A remote code execution vulnerability exists in the way that the VBScript engine handles objects in memory. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. (CVE-2019-0842)

- A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Microsoft Edge. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. (CVE-2019-0739)

- A remote code execution vulnerability exists when the Windows Jet Database Engine improperly handles objects in memory. An attacker who successfully exploited this vulnerability could execute arbitrary code on a victim system. An attacker could exploit this vulnerability by enticing a victim to open a specially crafted file. The update addresses the vulnerability by correcting the way the Windows Jet Database Engine handles objects in memory. (CVE-2019-0846, CVE-2019-0847, CVE-2019-0851, CVE-2019-0877, CVE-2019-0879)

- An elevation of privilege vulnerability exists when the Windows Client Server Run-Time Subsystem (CSRSS) fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0735)

- An information disclosure vulnerability exists when Windows Task Scheduler improperly discloses credentials to Windows Credential Manager. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0838)

- An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links. An attacker who successfully exploited this vulnerability could run processes in an elevated context. An attacker could then install programs; view, change or delete data. (CVE-2019-0841)

- An information disclosure vulnerability exists when Microsoft Edge improperly handles objects in memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. (CVE-2019-0833)

- A remote code execution vulnerability exists when Windows improperly handles objects in memory. An attacker who successfully exploited these vulnerabilities could take control of an affected system. (CVE-2019-0856)

- An information disclosure vulnerability exists when the win32k component improperly provides kernel information. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. (CVE-2019-0814, CVE-2019-0848)

- An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0685, CVE-2019-0803, CVE-2019-0859)

- An elevation of privilege vulnerability exists in the Microsoft Server Message Block (SMB) Server when an attacker with valid credentials attempts to open a specially crafted file over the SMB protocol on the same machine. An attacker who successfully exploited this vulnerability could bypass certain security checks in the operating system. (CVE-2019-0786)

- A remote code execution vulnerability exists when the Microsoft XML Core Services MSXML parser processes user input. An attacker who successfully exploited the vulnerability could run malicious code remotely to take control of the users system. (CVE-2019-0790, CVE-2019-0791, CVE-2019-0792, CVE-2019-0793, CVE-2019-0795)

- A remote code execution vulnerability exists in the way that the Chakra scripting engine handles objects in memory in Microsoft Edge. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. (CVE-2019-0806, CVE-2019-0810, CVE-2019-0812, CVE-2019-0829, CVE-2019-0860, CVE-2019-0861)

- An information disclosure vulnerability exists when the scripting engine does not properly handle objects in memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. (CVE-2019-0835)

- An elevation of privilege vulnerability exists when Windows improperly handles calls to the LUAFV driver (luafv.sys). An attacker who successfully exploited this vulnerability could set the short name of a file with a long name to an arbitrary short name, overriding the file system with limited privileges. (CVE-2019-0796)

Solution

Apply Cumulative Update KB4493509.

Public Exploits

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Target Network Port(s): 139, 445
Target Asset(s): Host/patch_management_checks
Exploit Available: True (Metasploit Framework, Exploit-DB, GitHub, Immunity Canvas, Core Impact)
Exploit Ease: Exploits are available

Here's the list of publicly known exploits and PoCs for verifying the KB4493509: Windows 10 Version 1809 and Windows Server 2019 April 2019 Security Update vulnerability:

1. Metasploit: exploit/windows/local/appxsvc_hard_link_privesc
   [AppXSvc Hard Link Privilege Escalation]
2. Exploit-DB: exploits/windows/dos/47768.txt
   [EDB-47768: AppXSvc 17763 - Arbitrary File Overwrite (DoS)]
3. Exploit-DB: exploits/windows/local/46920.txt
   [EDB-46920: Microsoft Windows - 'Win32k' Local Privilege Escalation]
4. Exploit-DB: exploits/windows/local/46938.txt
   [EDB-46938: Microsoft Windows - AppX Deployment Service Local Privilege Escalation (2)]
5. Exploit-DB: exploits/windows/local/46976.txt
   [EDB-46976: Microsoft Windows - AppX Deployment Service Local Privilege Escalation (3)]
6. Exploit-DB: exploits/windows/local/47128.rb
   [EDB-47128: Microsoft Windows 10 < build 17763 - AppXSvc Hard Link Privilege Escalation (Metasploit)]
7. Exploit-DB: exploits/windows/local/47389.txt
   [EDB-47389: AppXSvc - Privilege Escalation]
8. Exploit-DB: exploits/windows/remote/46928.html
   [EDB-46928: Microsoft Internet Explorer Windows 10 1809 17763.316 - Scripting Engine Memory Corruption]
9. GitHub: https://github.com/ycdxsb/WindowsPrivilegeEscalation
   [CVE-2019-0685]
10. GitHub: https://github.com/punishell/WindowsLegacyCVE
    [CVE-2019-0730]
11. GitHub: https://github.com/punishell/WindowsLegacyCVE
    [CVE-2019-0731]
12. GitHub: https://github.com/punishell/WindowsLegacyCVE
    [CVE-2019-0732]
13. GitHub: https://github.com/punishell/WindowsLegacyCVE
    [CVE-2019-0735]
14. GitHub: https://github.com/CreatePhotonW/CVE-2019-0752
    [CVE-2019-0752]
15. GitHub: https://github.com/ZwCreatePhoton/CVE-2019-0752
    [CVE-2019-0752]
16. GitHub: https://github.com/punishell/WindowsLegacyCVE
    [CVE-2019-0796]
17. GitHub: https://github.com/Al1ex/WindowsElevation
    [CVE-2019-0803]
18. GitHub: https://github.com/Ascotbe/Kernelhub
    [CVE-2019-0803]
19. GitHub: https://github.com/ExpLife0011/awesome-windows-kernel-security-development
    [CVE-2019-0803]
20. GitHub: https://github.com/Jkrasher/WindowsThreatResearch_JKrasher
    [CVE-2019-0803]
21. GitHub: https://github.com/Mr-xn/Penetration_Testing_POC
    [CVE-2019-0803]
22. GitHub: https://github.com/Ondrik8/exploit
    [CVE-2019-0803]
23. GitHub: https://github.com/SecWiki/windows-kernel-exploits
    [CVE-2019-0803]
24. GitHub: https://github.com/SexyBeast233/SecBooks
    [CVE-2019-0803]
25. GitHub: https://github.com/demilson/Windows
    [CVE-2019-0803]
26. GitHub: https://github.com/distance-vector/window-kernel-exp
    [CVE-2019-0803]
27. GitHub: https://github.com/fengjixuchui/RedTeamer
    [CVE-2019-0803]
28. GitHub: https://github.com/mishmashclone/SecWiki-windows-kernel-exploits
    [CVE-2019-0803]
29. GitHub: https://github.com/pravinsrc/NOTES-windows-kernel-links
    [CVE-2019-0803]
30. GitHub: https://github.com/root26/bug
    [CVE-2019-0803]
31. GitHub: https://github.com/safesword/WindowsExp
    [CVE-2019-0803]
32. GitHub: https://github.com/ycdxsb/WindowsPrivilegeEscalation
    [CVE-2019-0803]
33. GitHub: https://github.com/yisan1/hh
    [CVE-2019-0803]
34. GitHub: https://github.com/punishell/WindowsLegacyCVE
    [CVE-2019-0805]
35. GitHub: https://github.com/deadjakk/patch-checker
    [CVE-2019-0836]
36. GitHub: https://github.com/hlldz/dazzleUP
    [CVE-2019-0836]
37. GitHub: https://github.com/lawrenceamer/0xsp-Mongoose
    [CVE-2019-0836]
38. GitHub: https://github.com/mishmashclone/rasta-mouse-Watson
    [CVE-2019-0836]
39. GitHub: https://github.com/paramint/Watson-Windows-check-KB
    [CVE-2019-0836]
40. GitHub: https://github.com/punishell/WindowsLegacyCVE
    [CVE-2019-0836]
41. GitHub: https://github.com/rasta-mouse/Watson
    [CVE-2019-0836]
42. GitHub: https://github.com/S3cur3Th1sSh1t/SharpByeBear
    [CVE-2019-0841]
43. GitHub: https://github.com/S3cur3Th1sSh1t/SharpPolarBear
    [CVE-2019-0841]
44. GitHub: https://github.com/S3cur3Th1sSh1t/WinPwn
    [CVE-2019-0841]
45. GitHub: https://github.com/ThePirateWhoSmellsOfSunflowers/TheHackerLinks
    [CVE-2019-0841]
46. GitHub: https://github.com/deadjakk/patch-checker
    [CVE-2019-0841]
47. GitHub: https://github.com/hlldz/dazzleUP
    [CVE-2019-0841]
48. GitHub: https://github.com/lawrenceamer/0xsp-Mongoose
    [CVE-2019-0841]
49. GitHub: https://github.com/likescam/CVE-2019-0841
    [CVE-2019-0841]
50. GitHub: https://github.com/mappl3/CVE-2019-0841
    [CVE-2019-0841]
51. GitHub: https://github.com/merlinxcy/ToolBox
    [CVE-2019-0841]
52. GitHub: https://github.com/mishmashclone/rasta-mouse-Watson
    [CVE-2019-0841]
53. GitHub: https://github.com/paramint/Watson-Windows-check-KB
    [CVE-2019-0841]
54. GitHub: https://github.com/pwninx/WinPwn
    [CVE-2019-0841]
55. GitHub: https://github.com/rasta-mouse/Watson
    [CVE-2019-0841]
56. GitHub: https://github.com/sgabe/CVE-2019-1253
    [CVE-2019-0841]
57. GitHub: https://github.com/sgabe/CVE-2019-1476
    [CVE-2019-0841]
58. GitHub: https://github.com/shubham0d/SymBlock
    [CVE-2019-0841]
59. GitHub: https://rastamouse.me/2019/04/weaponizing-cve-2019-0841-with-laps/
    [CVE-2019-0841]
60. GitHub: https://github.com/0xpetros/windows-privilage-escalation
    [CVE-2019-0859]
61. GitHub: https://github.com/Ascotbe/Kernelhub
    [CVE-2019-0859]
62. GitHub: https://github.com/FULLSHADE/WindowsExploitationResources
    [CVE-2019-0859]
63. GitHub: https://github.com/NullArray/WinKernel-Resources
    [CVE-2019-0859]
64. GitHub: https://github.com/Ondrik8/exploit
    [CVE-2019-0859]
65. GitHub: https://github.com/TamilHackz/windows-exploitation
    [CVE-2019-0859]
66. GitHub: https://github.com/lp008/Hack-readme
    [CVE-2019-0859]
67. GitHub: https://github.com/ycdxsb/WindowsPrivilegeEscalation
    [CVE-2019-0859]
68. GitHub: https://github.com/offensive-security/exploitdb-bin-sploits/blob/master/bin-sploits/46920.zip
    [EDB-46920]
69. GitHub: https://github.com/offensive-security/exploitdb-bin-sploits/blob/master/bin-sploits/46938.zip
    [EDB-46938]
70. GitHub: https://github.com/offensive-security/exploitdb-bin-sploits/blob/master/bin-sploits/46976.zip
    [EDB-46976]
71. GitHub: https://github.com/ExpLife0011/CVE-2019-0803
    [CVE-2019-0803: Win32k Elevation of Privilege Poc]
72. GitHub: https://github.com/0x00-0x00/CVE-2019-0841-BYPASS
    [CVE-2019-0841: A fully automatic CVE-2019-0841 bypass targeting all versions of Edge in Windows 10. ...]
73. GitHub: https://github.com/rogue-kdc/CVE-2019-0841
    [CVE-2019-0841: PoC code for CVE-2019-0841 Privilege Escalation vulnerability]
74. GitHub: https://github.com/Sheisback/CVE-2019-0859-1day-Exploit
    [CVE-2019-0859: CVE-2019-0859 1day Exploit]
75. Immunity Canvas: CANVAS

Before running any exploit against any system, make sure you are authorized by the owner of the target system(s) to perform such activity. In any other case, this would be considered as an illegal activity.

WARNING: Beware of using unverified exploits from sources such as GitHub or Exploit-DB. These exploits and PoCs could contain malware. For more information, see how to use exploits safely.

Risk Information

---

CVSS Score Source [?]: CVE-2019-0853
CVSS V2 Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C/E:H/RL:OF/RC:C

CVSS Base Score:	9.3 (High)
Impact Subscore:	10.0
Exploitability Subscore:	8.6
CVSS Temporal Score:	8.1 (High)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	8.1 (High)

CVSS V3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C

CVSS Base Score:	8.8 (High)
Impact Subscore:	5.9
Exploitability Subscore:	2.8
CVSS Temporal Score:	8.4 (High)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	8.4 (High)

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Plugin Source

---

This is the smb_nt_ms19_apr_4493509.nasl nessus plugin source code. This script is Copyright (C) 2019-2022 and is owned by Tenable, Inc. or an Affiliate thereof.

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from the Microsoft Security Updates API. The text
# itself is copyright (C) Microsoft Corporation.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(123948);
  script_version("1.16");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/03/28");

  script_cve_id(
    "CVE-2019-0685",
    "CVE-2019-0688",
    "CVE-2019-0730",
    "CVE-2019-0731",
    "CVE-2019-0732",
    "CVE-2019-0735",
    "CVE-2019-0739",
    "CVE-2019-0752",
    "CVE-2019-0753",
    "CVE-2019-0764",
    "CVE-2019-0786",
    "CVE-2019-0790",
    "CVE-2019-0791",
    "CVE-2019-0792",
    "CVE-2019-0793",
    "CVE-2019-0794",
    "CVE-2019-0795",
    "CVE-2019-0796",
    "CVE-2019-0802",
    "CVE-2019-0803",
    "CVE-2019-0805",
    "CVE-2019-0806",
    "CVE-2019-0810",
    "CVE-2019-0812",
    "CVE-2019-0814",
    "CVE-2019-0829",
    "CVE-2019-0833",
    "CVE-2019-0835",
    "CVE-2019-0836",
    "CVE-2019-0838",
    "CVE-2019-0839",
    "CVE-2019-0840",
    "CVE-2019-0841",
    "CVE-2019-0842",
    "CVE-2019-0844",
    "CVE-2019-0845",
    "CVE-2019-0846",
    "CVE-2019-0847",
    "CVE-2019-0848",
    "CVE-2019-0849",
    "CVE-2019-0851",
    "CVE-2019-0853",
    "CVE-2019-0856",
    "CVE-2019-0859",
    "CVE-2019-0860",
    "CVE-2019-0861",
    "CVE-2019-0862",
    "CVE-2019-0877",
    "CVE-2019-0879"
  );
  script_xref(name:"MSKB", value:"4493509");
  script_xref(name:"MSFT", value:"MS19-4493509");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2022/05/03");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2022/08/15");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2022/04/05");

  script_name(english:"KB4493509: Windows 10 Version 1809 and Windows Server 2019 April 2019 Security Update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Windows host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The remote Windows host is missing security update 4493509.
It is, therefore, affected by multiple vulnerabilities :

  - A security feature bypass vulnerability exists in
    Windows which could allow an attacker to bypass Device
    Guard when Windows improperly handles calls to the LUAFV
    driver (luafv.sys). An attacker who successfully
    exploited this vulnerability could circumvent a User
    Mode Code Integrity (UMCI) policy on the machine.
    (CVE-2019-0732)

  - An information disclosure vulnerability exists when the
    Terminal Services component improperly discloses the
    contents of its memory. An attacker who successfully
    exploited the vulnerability could obtain information to
    further compromise a users system.  (CVE-2019-0839)

  - An information disclosure vulnerability exists when the
    Windows TCP/IP stack improperly handles fragmented IP
    packets. An attacker who successfully exploited this
    vulnerability could obtain information to further
    compromise the users system.  (CVE-2019-0688)

  - An information disclosure vulnerability exists when the
    Windows kernel improperly handles objects in memory. An
    attacker who successfully exploited this vulnerability
    could obtain information to further compromise the users
    system.  (CVE-2019-0840, CVE-2019-0844)

  - A tampering vulnerability exists when Microsoft browsers
    do not properly validate input under specific
    conditions. An attacker who exploited the vulnerability
    could pass custom command line parameters.
    (CVE-2019-0764)

  - An elevation of privilege vulnerability exists when
    Windows improperly handles calls to the LUAFV driver
    (luafv.sys). An attacker who successfully exploited this
    vulnerability could run arbitrary code in the security
    context of the local system. An attacker could then
    install programs; view, change, or delete data; or
    create new accounts with full user rights.
    (CVE-2019-0730, CVE-2019-0731, CVE-2019-0805,
    CVE-2019-0836)

  - A remote code execution vulnerability exists in the way
    that the scripting engine handles objects in memory in
    Internet Explorer. The vulnerability could corrupt
    memory in such a way that an attacker could execute
    arbitrary code in the context of the current user. An
    attacker who successfully exploited the vulnerability
    could gain the same user rights as the current user.
    (CVE-2019-0752, CVE-2019-0753, CVE-2019-0862)

  - An information disclosure vulnerability exists when the
    Windows GDI component improperly discloses the contents
    of its memory. An attacker who successfully exploited
    the vulnerability could obtain information to further
    compromise the users system. There are multiple ways an
    attacker could exploit the vulnerability, such as by
    convincing a user to open a specially crafted document,
    or by convincing a user to visit an untrusted webpage.
    The security update addresses the vulnerability by
    correcting how the Windows GDI component handles objects
    in memory. (CVE-2019-0802, CVE-2019-0849)

  - A remote code execution vulnerability exists when OLE
    automation improperly handles objects in memory. An
    attacker who successfully exploited the vulnerability
    could gain execution on the victim system.
    (CVE-2019-0794)

  - A remote code execution vulnerability exists when the
    IOleCvt interface renders ASP webpage content. An
    attacker who successfully exploited the vulnerability
    could run malicious code remotely to take control of the
    users system.  (CVE-2019-0845)

  - A remote code execution vulnerability exists in the way
    that the Windows Graphics Device Interface (GDI) handles
    objects in the memory. An attacker who successfully
    exploited this vulnerability could take control of the
    affected system. An attacker could then install
    programs; view, change, or delete data; or create new
    accounts with full user rights.  (CVE-2019-0853)

  - A remote code execution vulnerability exists in the way
    that the VBScript engine handles objects in memory. The
    vulnerability could corrupt memory in such a way that an
    attacker could execute arbitrary code in the context of
    the current user. An attacker who successfully exploited
    the vulnerability could gain the same user rights as the
    current user.  (CVE-2019-0842)

  - A remote code execution vulnerability exists in the way
    that the scripting engine handles objects in memory in
    Microsoft Edge. The vulnerability could corrupt memory
    in such a way that an attacker could execute arbitrary
    code in the context of the current user. An attacker who
    successfully exploited the vulnerability could gain the
    same user rights as the current user.  (CVE-2019-0739)

  - A remote code execution vulnerability exists when the
    Windows Jet Database Engine improperly handles objects
    in memory. An attacker who successfully exploited this
    vulnerability could execute arbitrary code on a victim
    system. An attacker could exploit this vulnerability by
    enticing a victim to open a specially crafted file. The
    update addresses the vulnerability by correcting the way
    the Windows Jet Database Engine handles objects in
    memory. (CVE-2019-0846, CVE-2019-0847, CVE-2019-0851,
    CVE-2019-0877, CVE-2019-0879)

  - An elevation of privilege vulnerability exists when the
    Windows Client Server Run-Time Subsystem (CSRSS) fails
    to properly handle objects in memory. An attacker who
    successfully exploited this vulnerability could run
    arbitrary code. An attacker could then install programs;
    view, change, or delete data; or create new accounts
    with full user rights.  (CVE-2019-0735)

  - An information disclosure vulnerability exists when
    Windows Task Scheduler improperly discloses credentials
    to Windows Credential Manager. An attacker who
    successfully exploited the vulnerability could obtain
    information to further compromise the users system. An
    attacker could then install programs; view, change, or
    delete data; or create new accounts with full user
    rights.  (CVE-2019-0838)

  - An elevation of privilege vulnerability exists when
    Windows AppX Deployment Service (AppXSVC) improperly
    handles hard links. An attacker who successfully
    exploited this vulnerability could run processes in an
    elevated context. An attacker could then install
    programs; view, change or delete data.  (CVE-2019-0841)

  - An information disclosure vulnerability exists when
    Microsoft Edge improperly handles objects in memory. An
    attacker who successfully exploited the vulnerability
    could obtain information to further compromise the users
    system.  (CVE-2019-0833)

  - A remote code execution vulnerability exists when
    Windows improperly handles objects in memory. An
    attacker who successfully exploited these
    vulnerabilities could take control of an affected
    system.  (CVE-2019-0856)

  - An information disclosure vulnerability exists when the
    win32k component improperly provides kernel information.
    An attacker who successfully exploited the vulnerability
    could obtain information to further compromise the users
    system.  (CVE-2019-0814, CVE-2019-0848)

  - An elevation of privilege vulnerability exists in
    Windows when the Win32k component fails to properly
    handle objects in memory. An attacker who successfully
    exploited this vulnerability could run arbitrary code in
    kernel mode. An attacker could then install programs;
    view, change, or delete data; or create new accounts
    with full user rights.  (CVE-2019-0685, CVE-2019-0803,
    CVE-2019-0859)

  - An elevation of privilege vulnerability exists in the
    Microsoft Server Message Block (SMB) Server when an
    attacker with valid credentials attempts to open a
    specially crafted file over the SMB protocol on the same
    machine. An attacker who successfully exploited this
    vulnerability could bypass certain security checks in
    the operating system.  (CVE-2019-0786)

  - A remote code execution vulnerability exists when the
    Microsoft XML Core Services MSXML parser processes user
    input. An attacker who successfully exploited the
    vulnerability could run malicious code remotely to take
    control of the users system.  (CVE-2019-0790,
    CVE-2019-0791, CVE-2019-0792, CVE-2019-0793,
    CVE-2019-0795)

  - A remote code execution vulnerability exists in the way
    that the Chakra scripting engine handles objects in
    memory in Microsoft Edge. The vulnerability could
    corrupt memory in such a way that an attacker could
    execute arbitrary code in the context of the current
    user. An attacker who successfully exploited the
    vulnerability could gain the same user rights as the
    current user.  (CVE-2019-0806, CVE-2019-0810,
    CVE-2019-0812, CVE-2019-0829, CVE-2019-0860,
    CVE-2019-0861)

  - An information disclosure vulnerability exists when the
    scripting engine does not properly handle objects in
    memory. An attacker who successfully exploited the
    vulnerability could obtain information to further
    compromise the users system.  (CVE-2019-0835)

  - An elevation of privilege vulnerability exists when
    Windows improperly handles calls to the LUAFV driver
    (luafv.sys). An attacker who successfully exploited this
    vulnerability could set the short name of a file with a
    long name to an arbitrary short name, overriding the
    file system with limited privileges.  (CVE-2019-0796)");
  # https://support.microsoft.com/en-us/help/4493509/windows-10-update-kb4493509
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b1b34dad");
  script_set_attribute(attribute:"solution", value:
"Apply Cumulative Update KB4493509.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-0853");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploit_framework_core", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'AppXSvc Hard Link Privilege Escalation');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
  script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
  script_set_attribute(attribute:"canvas_package", value:"CANVAS");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/04/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/04/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/04/09");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:microsoft:windows");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:edge");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Windows : Microsoft Bulletins");

  script_copyright(english:"This script is Copyright (C) 2019-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("smb_check_rollup.nasl", "smb_hotfixes.nasl", "ms_bulletin_checks_possible.nasl");
  script_require_keys("SMB/MS_Bulletin_Checks/Possible");
  script_require_ports(139, 445, "Host/patch_management_checks");

  exit(0);
}

include("audit.inc");
include("smb_hotfixes_fcheck.inc");
include("smb_hotfixes.inc");
include("smb_func.inc");
include("misc_func.inc");

get_kb_item_or_exit("SMB/MS_Bulletin_Checks/Possible");

bulletin = "MS19-04";
kbs = make_list('4493509');

if (get_kb_item("Host/patch_management_checks")) hotfix_check_3rd_party(bulletin:bulletin, kbs:kbs, severity:SECURITY_HOLE);

get_kb_item_or_exit("SMB/Registry/Enumerated");
get_kb_item_or_exit("SMB/WindowsVersion", exit_code:1);

if (hotfix_check_sp_range(win10:'0') <= 0) audit(AUDIT_OS_SP_NOT_VULN);

share = hotfix_get_systemdrive(as_share:TRUE, exit_on_fail:TRUE);
if (!is_accessible_share(share:share)) audit(AUDIT_SHARE_FAIL, share);

if (
  smb_check_rollup(os:"10",
                   sp:0,
                   os_build:"17763",
                   rollup_date:"04_2019",
                   bulletin:bulletin,
                   rollup_kb_list:[4493509])
)
{
  replace_kb_item(name:'SMB/Missing/'+bulletin, value:TRUE);
  hotfix_security_hole();
  hotfix_check_fversion_end();
  exit(0);
}
else
{
  hotfix_check_fversion_end();
  audit(AUDIT_HOST_NOT, hotfix_get_audit_report());
}

The latest version of this script can be found in these locations depending on your platform:

• Linux / Unix:
  /opt/nessus/lib/nessus/plugins/smb_nt_ms19_apr_4493509.nasl
• Windows:
  C:\ProgramData\Tenable\Nessus\nessus\plugins\smb_nt_ms19_apr_4493509.nasl
• Mac OS X:
  /Library/Nessus/run/lib/nessus/plugins/smb_nt_ms19_apr_4493509.nasl

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How to Run

---

Here is how to run the KB4493509: Windows 10 Version 1809 and Windows Server 2019 April 2019 Security Update as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

1. Click to start a New Scan.
2. Select Advanced Scan.
3. Navigate to the Plugins tab.
4. On the top right corner click to Disable All plugins.
5. On the left side table select Windows : Microsoft Bulletins plugin family.
6. On the right side table select KB4493509: Windows 10 Version 1809 and Windows Server 2019 April 2019 Security Update plugin ID 123948.
7. Specify the target on the Settings tab and click to Save the scan.
8. Run the scan.

Here are a few examples of how to run the plugin in the command line. Note that the examples below demonstrate the usage on the Linux / Unix platform.

Basic usage:

/opt/nessus/bin/nasl smb_nt_ms19_apr_4493509.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a smb_nt_ms19_apr_4493509.nasl -t <IP/HOST>

Run the plugin with trace script execution written to the console (useful for debugging):

/opt/nessus/bin/nasl -T - smb_nt_ms19_apr_4493509.nasl -t <IP/HOST>

Run the plugin with using a state file for the target and updating it (useful for running multiple plugins on the target):

/opt/nessus/bin/nasl -K /tmp/state smb_nt_ms19_apr_4493509.nasl -t <IP/HOST>

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References

---

MSKB | Microsoft Knowledge Base:

• 4493509

MSFT | Microsoft Security Bulletin:

• MS19-4493509

See also:

• https://www.tenable.com/plugins/nessus/123948
• http://www.nessus.org/u?b1b34dad
• https://vulners.com/nessus/SMB_NT_MS19_APR_4493509.NASL

Similar and related Nessus plugins:

• 123939 - KB4493441: Windows 10 Version 1709 and Windows Server Version 1709 April 2019 Security Update
• 123940 - KB4493467: Windows 8.1 and Windows Server 2012 R2 April 2019 Security Update
• 123941 - KB4493450: Windows Server 2012 April 2019 Security Update
• 123942 - KB4493464: Windows 10 Version 1803 and Windows Server Version 1803 April 2019 Security Update
• 123943 - KB4493470: Windows 10 Version 1607 and Windows Server 2016 April 2019 Security Update
• 123944 - KB4493458: Windows Server 2008 April 2019 Security Update
• 123945 - KB4493448: Windows 7 and Windows Server 2008 R2 April 2019 Security Update
• 123946 - KB4493474: Windows 10 Version 1703 April 2019 Security Update
• 123947 - KB4493475: Windows 10 April 2019 Security Update
• 123951 - Security Updates for Internet Explorer (April 2019)

Version

---

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file smb_nt_ms19_apr_4493509.nasl version 1.16. For more plugins, visit the Nessus Plugin Library.

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