Amazon Linux AMI : kernel (ALAS-2017-868) - Nessus

High Plugin ID: 102367

This page contains detailed information about the Amazon Linux AMI : kernel (ALAS-2017-868) Nessus plugin including available exploits and PoCs found on GitHub, in Metasploit or Exploit-DB for verifying of this vulnerability.

Table Of Contents

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Plugin Overview
Vulnerability Information

Synopsis
Description
Solution

Public Exploits
Risk Information
Plugin Source
How to Run
References
Version

Plugin Overview

ID: 102367
Name: Amazon Linux AMI : kernel (ALAS-2017-868)
Filename: ala_ALAS-2017-868.nasl
Vulnerability Published: 2017-07-11
This Plugin Published: 2017-08-11
Last Modification Time: 2019-06-10
Plugin Version: 3.9
Plugin Type: local
Plugin Family: Amazon Linux Local Security Checks
Dependencies: ssh_get_info.nasl
Required KB Items [?]: Host/AmazonLinux/release, Host/AmazonLinux/rpm-list, Host/local_checks_enabled

Vulnerability Information

Synopsis

The remote Amazon Linux AMI host is missing a security update.

Description

Exploitable memory corruption due to UFO to non-UFO path switch (CVE-2017-1000112)

heap out-of-bounds in AF_PACKET sockets (CVE-2017-1000111)

The mq_notify function in the Linux kernel does not set the sock pointer to NULL upon entry into the retry logic. During a user-space close of a Netlink socket, it allows attackers to possibly cause a situation where a value may be used after being freed (use-after-free) which may lead to memory corruption or other unspecified other impact. (CVE-2017-11176 )

Solution

Run 'yum update kernel' to update your system.

Public Exploits

Target Network Port(s): N/A
Target Asset(s): N/A
Exploit Available: True (Metasploit Framework, Exploit-DB, GitHub, Core Impact)
Exploit Ease: Exploits are available

Here's the list of publicly known exploits and PoCs for verifying the Amazon Linux AMI : kernel (ALAS-2017-868) vulnerability:

Metasploit: exploit/linux/local/ufo_privilege_escalation
[Linux Kernel UDP Fragmentation Offset (UFO) Privilege Escalation]
Exploit-DB: exploits/linux/local/43418.c
[EDB-43418: Linux Kernel < 4.4.0-83 / < 4.8.0-58 (Ubuntu 14.04/16.04) - Local Privilege Escalation (KASLR / SMEP)]
Exploit-DB: exploits/linux/local/45147.rb
[EDB-45147: Linux Kernel - UDP Fragmentation Offset 'UFO' Privilege Escalation (Metasploit)]
Exploit-DB: exploits/linux/local/45553.c
[EDB-45553: Linux Kernel < 4.11.8 - 'mq_notify: double sock_put()' Local Privilege Escalation]
Exploit-DB: exploits/linux/local/47169.c
[EDB-47169: Linux Kernel < 4.4.0/ < 4.8.0 (Ubuntu 14.04/16.04 / Linux Mint 17/18 / Zorin) - Local Privilege Escalation (KASLR / SMEP)]
GitHub: https://github.com/Al1ex/LinuxEelvation
[CVE-2017-11176]
GitHub: https://github.com/DoubleMice/cve-2017-11176
[CVE-2017-11176: My first try to code my own LPE exploit.]
GitHub: https://github.com/Flerov/WindowsExploitDev
[CVE-2017-11176]
GitHub: https://github.com/HckEX/CVE-2017-11176
[CVE-2017-11176]
GitHub: https://github.com/ahpaleus/ahp_cheatsheet
[CVE-2017-11176]
GitHub: https://github.com/anoaghost/Localroot_Compile
[CVE-2017-11176]
GitHub: https://github.com/applemasterz17/CVE-2017-11176
[CVE-2017-11176: Anaysis cve-2017-11176 / mq_notify issue]
GitHub: https://github.com/bsauce/kernel-exploit-factory
[CVE-2017-11176]
GitHub: https://github.com/bsauce/kernel-security-learning
[CVE-2017-11176]
GitHub: https://github.com/c3r34lk1ll3r/CVE-2017-11176
[CVE-2017-11176: Code execution for CVE-2017-11176]
GitHub: https://github.com/cranelab/exploit-development
[CVE-2017-11176]
GitHub: https://github.com/klecko/exploits
[CVE-2017-11176]
GitHub: https://github.com/leonardo1101/cve-2017-11176
[CVE-2017-11176]
GitHub: https://github.com/lexfo/cve-2017-11176
[CVE-2017-11176]
GitHub: https://github.com/xairy/linux-kernel-exploitation
[CVE-2017-11176]
GitHub: https://github.com/Al1ex/LinuxEelvation
[CVE-2017-1000112]
GitHub: https://github.com/De4dCr0w/Linux-kernel-EoP-exp
[CVE-2017-1000112]
GitHub: https://github.com/IT19083124/SNP-Assignment
[CVE-2017-1000112: Exploit work Privilege Escalation CVE-2017-1000112]
GitHub: https://github.com/Metarget/metarget
[CVE-2017-1000112]
GitHub: https://github.com/R0B1NL1N/Linux-Kernal-Exploits-m-
[CVE-2017-1000112]
GitHub: https://github.com/R0B1NL1N/Linux-Kernel-Exploites
[CVE-2017-1000112]
GitHub: https://github.com/Snoopy-Sec/Localroot-ALL-CVE
[CVE-2017-1000112]
GitHub: https://github.com/Technoashofficial/kernel-exploitation-linux
[CVE-2017-1000112]
GitHub: https://github.com/amane312/Linux_menthor
[CVE-2017-1000112]
GitHub: https://github.com/amrelsadane123/Ecploit-kernel-4.10-linux-local
[CVE-2017-1000112]
GitHub: https://github.com/anoaghost/Localroot_Compile
[CVE-2017-1000112]
GitHub: https://github.com/bcoles/kernel-exploits
[CVE-2017-1000112]
GitHub: https://github.com/bsauce/kernel-exploit-factory
[CVE-2017-1000112]
GitHub: https://github.com/bsauce/kernel-security-learning
[CVE-2017-1000112]
GitHub: https://github.com/ferovap/Tools
[CVE-2017-1000112]
GitHub: https://github.com/frizb/Linux-Privilege-Escalation
[CVE-2017-1000112]
GitHub: https://github.com/h4x0r-dz/local-root-exploit-
[CVE-2017-1000112]
GitHub: https://github.com/hikame/docker_escape_pwn
[CVE-2017-1000112: Escape from Docker using CVE-2017-1000112 and CVE-2017-18344, including gaining root ...]
GitHub: https://github.com/ismailvc1111/Linux_Privilege
[CVE-2017-1000112]
GitHub: https://github.com/jiayy/android_vuln_poc-exp
[CVE-2017-1000112]
GitHub: https://github.com/milabs/lkrg-bypass
[CVE-2017-1000112]
GitHub: https://github.com/mzet-/linux-exploit-suggester
[CVE-2017-1000112]
GitHub: https://github.com/n3t1nv4d3/kernel-exploits
[CVE-2017-1000112]
GitHub: https://github.com/ol0273st-s/CVE-2017-1000112-Adpated
[CVE-2017-1000112: POE code for CVE-2017-1000112 adapted to both funtion on a specific VM and Escape a ...]
GitHub: https://github.com/qiantu88/Linux--exp
[CVE-2017-1000112]
GitHub: https://github.com/rakjong/LinuxElevation
[CVE-2017-1000112]
GitHub: https://github.com/santoshankr/smep_detector
[CVE-2017-1000112]
GitHub: https://github.com/spencerdodd/kernelpop
[CVE-2017-1000112]
GitHub: https://github.com/xairy/kernel-exploits
[CVE-2017-1000112]
GitHub: https://github.com/xairy/kernel-exploits/tree/master/CVE-2017-1000112
[CVE-2017-1000112]
GitHub: https://github.com/xairy/linux-kernel-exploitation
[CVE-2017-1000112]

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 V2 Vector [?]: AV:L/AC:L/Au:N/C:C/I:C/A:C/E:F/RL:OF/RC:C

CVSS Base Score:	7.2 (High)
Impact Subscore:	10.0
Exploitability Subscore:	3.9
CVSS Temporal Score:	6.0 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	6.0 (Medium)

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

CVSS Base Score:	7.8 (High)
Impact Subscore:	5.9
Exploitability Subscore:	1.8
CVSS Temporal Score:	7.2 (High)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	7.2 (High)

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Plugin Source

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2017-868.
#

include("compat.inc");

if (description)
{
  script_id(102367);
  script_version("3.9");
  script_cvs_date("Date: 2019/06/10 11:30:32");

  script_cve_id("CVE-2017-1000111", "CVE-2017-1000112", "CVE-2017-11176");
  script_xref(name:"ALAS", value:"2017-868");

  script_name(english:"Amazon Linux AMI : kernel (ALAS-2017-868)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Amazon Linux AMI host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Exploitable memory corruption due to UFO to non-UFO path switch
(CVE-2017-1000112)

heap out-of-bounds in AF_PACKET sockets (CVE-2017-1000111)

The mq_notify function in the Linux kernel does not set the sock
pointer to NULL upon entry into the retry logic. During a user-space
close of a Netlink socket, it allows attackers to possibly cause a
situation where a value may be used after being freed (use-after-free)
which may lead to memory corruption or other unspecified other impact.
(CVE-2017-11176 )"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://alas.aws.amazon.com/ALAS-2017-868.html"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Run 'yum update kernel' to update your system."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
  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:'Linux Kernel UDP Fragmentation Offset (UFO) Privilege Escalation');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-debuginfo-common-i686");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-debuginfo-common-x86_64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-headers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-tools-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-tools-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:perf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:perf-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/07/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/10/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/08/11");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Amazon Linux Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/AmazonLinux/release", "Host/AmazonLinux/rpm-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("rpm.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);

release = get_kb_item("Host/AmazonLinux/release");
if (isnull(release) || !strlen(release)) audit(AUDIT_OS_NOT, "Amazon Linux");
os_ver = pregmatch(pattern: "^AL(A|\d)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
os_ver = os_ver[1];
if (os_ver != "A")
{
  if (os_ver == 'A') os_ver = 'AMI';
  audit(AUDIT_OS_NOT, "Amazon Linux AMI", "Amazon Linux " + os_ver);
}

if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (rpm_check(release:"ALA", reference:"kernel-4.9.38-16.35.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"kernel-debuginfo-4.9.38-16.35.amzn1")) flag++;
if (rpm_check(release:"ALA", cpu:"i686", reference:"kernel-debuginfo-common-i686-4.9.38-16.35.amzn1")) flag++;
if (rpm_check(release:"ALA", cpu:"x86_64", reference:"kernel-debuginfo-common-x86_64-4.9.38-16.35.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"kernel-devel-4.9.38-16.35.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"kernel-doc-4.9.38-16.35.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"kernel-headers-4.9.38-16.35.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"kernel-tools-4.9.38-16.35.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"kernel-tools-debuginfo-4.9.38-16.35.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"kernel-tools-devel-4.9.38-16.35.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"perf-4.9.38-16.35.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"perf-debuginfo-4.9.38-16.35.amzn1")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "kernel / kernel-debuginfo / kernel-debuginfo-common-i686 / etc");
}

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

Linux / Unix:
/opt/nessus/lib/nessus/plugins/ala_ALAS-2017-868.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\ala_ALAS-2017-868.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/ala_ALAS-2017-868.nasl

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How to Run

Here is how to run the Amazon Linux AMI : kernel (ALAS-2017-868) as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

Click to start a New Scan.
Select Advanced Scan.
Navigate to the Plugins tab.
On the top right corner click to Disable All plugins.
On the left side table select Amazon Linux Local Security Checks plugin family.
On the right side table select Amazon Linux AMI : kernel (ALAS-2017-868) plugin ID 102367.
Specify the target on the Settings tab and click to Save the scan.
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 ala_ALAS-2017-868.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a ala_ALAS-2017-868.nasl -t <IP/HOST>

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

/opt/nessus/bin/nasl -T - ala_ALAS-2017-868.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 ala_ALAS-2017-868.nasl -t <IP/HOST>

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References

ALAS | Amazon Linux Security Advisory:

2017-868

See also:

Similar and related Nessus plugins:

101822 - Virtuozzo 7 : readykernel-patch (VZA-2017-065)
101919 - Fedora 25 : kernel (2017-98548b066b)
101923 - Fedora 26 : kernel (2017-deb70b495e)
101994 - Fedora 24 : kernel (2017-544eef948f)
102211 - Debian DSA-3927-1 : linux - security update (Stack Clash)
102415 - SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2017:2131-1)
102418 - Ubuntu 17.04 : linux, linux-raspi2 vulnerabilities (USN-3384-1)
102419 - Ubuntu 16.04 LTS : linux-hwe vulnerabilities (USN-3384-2)
102420 - Ubuntu 16.04 LTS : linux, linux-aws, linux-gke, linux-raspi2, linux-snapdragon vulnerabilities (USN-3385-1)
102421 - Ubuntu 14.04 LTS : linux-lts-xenial vulnerabilities (USN-3385-2)
102422 - Ubuntu 14.04 LTS : linux vulnerabilities (USN-3386-1)
102475 - SUSE SLES12 Security Update : kernel (SUSE-SU-2017:2142-1)
102478 - SUSE SLES12 Security Update : kernel (SUSE-SU-2017:2150-1)
102509 - openSUSE Security Update : the Linux Kernel (openSUSE-2017-929)
102510 - openSUSE Security Update : the Linux Kernel (openSUSE-2017-930)
102550 - Debian DSA-3945-1 : linux - security update (Stack Clash)
102591 - Virtuozzo 7 : readykernel-patch (VZA-2017-071)
102592 - Virtuozzo 7 : readykernel-patch (VZA-2017-072)
102593 - Virtuozzo 7 : readykernel-patch (VZA-2017-073)
102717 - Fedora 26 : kernel (2017-4336d64e21)
102718 - Fedora 25 : kernel (2017-73f71456d7)
102818 - Ubuntu 16.04 LTS : linux, linux-aws, linux-gke, linux-raspi2, linux-snapdragon vulnerabilities (USN-3405-1)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file ala_ALAS-2017-868.nasl version 3.9. For more plugins, visit the Nessus Plugin Library.

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Amazon Linux AMI : kernel (ALAS-2017-868) - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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