Debian DSA-2501-1 : xen - several vulnerabilities - Nessus

High Plugin ID: 59779

This page contains detailed information about the Debian DSA-2501-1 : xen - several vulnerabilities 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: 59779
Name: Debian DSA-2501-1 : xen - several vulnerabilities
Filename: debian_DSA-2501.nasl
Vulnerability Published: 2012-06-12
This Plugin Published: 2012-06-29
Last Modification Time: 2021-01-11
Plugin Version: 1.16
Plugin Type: local
Plugin Family: Debian Local Security Checks
Dependencies: ssh_get_info.nasl
Required KB Items [?]: Host/Debian/dpkg-l, Host/Debian/release, Host/local_checks_enabled

Vulnerability Information

Severity: High
Vulnerability Published: 2012-06-12
Patch Published: 2012-06-24
CVE [?]: CVE-2012-0217, CVE-2012-0218, CVE-2012-2934
CPE [?]: cpe:/o:debian:debian_linux:6.0, p-cpe:/a:debian:debian_linux:xen
Exploited by Malware: True

Synopsis

The remote Debian host is missing a security-related update.

Description

Several vulnerabilities were discovered in Xen, a hypervisor.

- CVE-2012-0217 Xen does not properly handle uncanonical return addresses on Intel amd64 CPUs, allowing amd64 PV guests to elevate to hypervisor privileges. AMD processors, HVM and i386 guests are not affected.

- CVE-2012-0218 Xen does not properly handle SYSCALL and SYSENTER instructions in PV guests, allowing unprivileged users inside a guest system to crash the guest system.

- CVE-2012-2934 Xen does not detect old AMD CPUs affected by AMD Erratum #121.

For CVE-2012-2934, Xen refuses to start domUs on affected systems unless the 'allow_unsafe' option is passed.

Solution

Upgrade the xen packages.

For the stable distribution (squeeze), these problems have been fixed in version 4.0.1-5.2.

Public Exploits

Target Network Port(s): N/A
Target Asset(s): N/A
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 Debian DSA-2501-1 : xen - several vulnerabilities vulnerability:

Metasploit: exploit/freebsd/local/intel_sysret_priv_esc
[FreeBSD Intel SYSRET Privilege Escalation]
Exploit-DB: exploits/freebsd_x86-64/local/46508.rb
[EDB-46508: FreeBSD - Intel SYSRET Privilege Escalation (Metasploit)]
GitHub: https://github.com/Apri1y/Red-Team-links
[CVE-2012-0217]
GitHub: https://github.com/Ascotbe/Kernelhub
[CVE-2012-0217]
GitHub: https://github.com/Echocipher/Resource-list
[CVE-2012-0217]
GitHub: https://github.com/Flerov/WindowsExploitDev
[CVE-2012-0217]
GitHub: https://github.com/Snoopy-Sec/Localroot-ALL-CVE
[CVE-2012-0217]
GitHub: https://github.com/anoaghost/Localroot_Compile
[CVE-2012-0217]
GitHub: https://github.com/cranelab/exploit-development
[CVE-2012-0217]
GitHub: https://github.com/felixlinker/ifc-rv-thesis
[CVE-2012-0217]
GitHub: https://github.com/hudunkey/Red-Team-links
[CVE-2012-0217]
GitHub: https://github.com/john-80/-007
[CVE-2012-0217]
GitHub: https://github.com/lp008/Hack-readme
[CVE-2012-0217]
GitHub: https://github.com/slimdaddy/RedTeam
[CVE-2012-0217]
GitHub: https://github.com/xiaoZ-hc/redtool
[CVE-2012-0217]
GitHub: https://github.com/ycdxsb/WindowsPrivilegeEscalation
[CVE-2012-0217]
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 V2 Vector [?]: AV:L/AC:L/Au:N/C:C/I:C/A:C/E:H/RL:OF/RC:C

CVSS Base Score:	7.2 (High)
Impact Subscore:	10.0
Exploitability Subscore:	3.9
CVSS Temporal Score:	6.3 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	6.3 (Medium)

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Plugin Source

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Debian Security Advisory DSA-2501. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

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

if (description)
{
  script_id(59779);
  script_version("1.16");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/11");

  script_cve_id("CVE-2012-0217", "CVE-2012-0218", "CVE-2012-2934");
  script_bugtraq_id(53856, 53955, 53961);
  script_xref(name:"DSA", value:"2501");

  script_name(english:"Debian DSA-2501-1 : xen - several vulnerabilities");
  script_summary(english:"Checks dpkg output for the updated package");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Several vulnerabilities were discovered in Xen, a hypervisor.

  - CVE-2012-0217
    Xen does not properly handle uncanonical return
    addresses on Intel amd64 CPUs, allowing amd64 PV guests
    to elevate to hypervisor privileges. AMD processors, HVM
    and i386 guests are not affected.

  - CVE-2012-0218
    Xen does not properly handle SYSCALL and SYSENTER
    instructions in PV guests, allowing unprivileged users
    inside a guest system to crash the guest system.

  - CVE-2012-2934
    Xen does not detect old AMD CPUs affected by AMD Erratum
    #121.

For CVE-2012-2934, Xen refuses to start domUs on affected systems
unless the 'allow_unsafe' option is passed."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/CVE-2012-0217"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/CVE-2012-0218"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/CVE-2012-2934"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/CVE-2012-2934"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/squeeze/xen"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2012/dsa-2501"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the xen packages.

For the stable distribution (squeeze), these problems have been fixed
in version 4.0.1-5.2."
  );
  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:H/RL:OF/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:'FreeBSD Intel SYSRET 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:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xen");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:6.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2012/06/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2012/06/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2012/06/29");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2012-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"6.0", prefix:"libxen-dev", reference:"4.0.1-5.2")) flag++;
if (deb_check(release:"6.0", prefix:"libxenstore3.0", reference:"4.0.1-5.2")) flag++;
if (deb_check(release:"6.0", prefix:"xen-docs-4.0", reference:"4.0.1-5.2")) flag++;
if (deb_check(release:"6.0", prefix:"xen-hypervisor-4.0-amd64", reference:"4.0.1-5.2")) flag++;
if (deb_check(release:"6.0", prefix:"xen-hypervisor-4.0-i386", reference:"4.0.1-5.2")) flag++;
if (deb_check(release:"6.0", prefix:"xen-utils-4.0", reference:"4.0.1-5.2")) flag++;
if (deb_check(release:"6.0", prefix:"xenstore-utils", reference:"4.0.1-5.2")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");

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

Linux / Unix:
/opt/nessus/lib/nessus/plugins/debian_DSA-2501.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\debian_DSA-2501.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/debian_DSA-2501.nasl

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How to Run

Here is how to run the Debian DSA-2501-1 : xen - several vulnerabilities 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 Debian Local Security Checks plugin family.
On the right side table select Debian DSA-2501-1 : xen - several vulnerabilities plugin ID 59779.
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 debian_DSA-2501.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a debian_DSA-2501.nasl -t <IP/HOST>

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

/opt/nessus/bin/nasl -T - debian_DSA-2501.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 debian_DSA-2501.nasl -t <IP/HOST>

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References

BID | SecurityFocus Bugtraq ID:

53856, 53955, 53961

DSA | Debian Security Advisory:

2501

See also:

Similar and related Nessus plugins:

59479 - CentOS 5 : kernel (CESA-2012:0721)
60088 - Debian DSA-2508-1 : kfreebsd-8 - privilege escalation
59748 - FreeBSD : FreeBSD -- Privilege escalation when returning from kernel (aed44c4e-c067-11e1-b5e0-000c299b62e1)
70184 - GLSA-201309-24 : Xen: Multiple vulnerabilities
74682 - openSUSE Security Update : xen (openSUSE-SU-2012:0886-1)
74683 - openSUSE Security Update : xen (openSUSE-2012-404)
68539 - Oracle Linux 5 : kernel (ELSA-2012-0721-1)
68540 - Oracle Linux 5 : kernel (ELSA-2012-0721)
79476 - OracleVM 3.0 : xen (OVMSA-2012-0020)
79477 - OracleVM 3.1 : xen (OVMSA-2012-0021)
79478 - OracleVM 2.2 : xen (OVMSA-2012-0022)
84140 - OracleVM 3.2 : xen (OVMSA-2015-0068) (POODLE) (Venom)
64039 - RHEL 5 : kernel (RHSA-2012:0720)
59467 - RHEL 5 : kernel (RHSA-2012:0721)
61326 - Scientific Linux Security Update : kernel on SL5.x i386/x86_64 (20120612)
59460 - MS12-042: Vulnerabilities in Windows Kernel Could Allow Elevation of Privilege (2711167)
76829 - Oracle Solaris Critical Patch Update : oct2012_SRU10_5
64233 - SuSE 11.1 Security Update : Xen (SAT Patch Number 6399)
59469 - SuSE 10 Security Update : Xen (ZYPP Patch Number 8180)
68573 - Oracle Linux 5 : kernel (ELSA-2012-1061-1)
68574 - Oracle Linux 5 : kernel (ELSA-2012-1061)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file debian_DSA-2501.nasl version 1.16. For more plugins, visit the Nessus Plugin Library.

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Debian DSA-2501-1 : xen - several vulnerabilities - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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