Debian DSA-5073-1 : expat - security update - Nessus

High Plugin ID: 158031

This page contains detailed information about the Debian DSA-5073-1 : expat - security update 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: 158031
Name: Debian DSA-5073-1 : expat - security update
Filename: debian_DSA-5073.nasl
Vulnerability Published: 2022-01-01
This Plugin Published: 2022-02-13
Last Modification Time: 2022-02-13
Plugin Version: 1.2
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: 2022-01-01
Patch Published: 2022-02-12
CVE [?]: CVE-2021-45960, CVE-2021-46143, CVE-2022-22822, CVE-2022-22823, CVE-2022-22824, CVE-2022-22825, CVE-2022-22826, CVE-2022-22827, CVE-2022-23852, CVE-2022-23990
CPE [?]: cpe:/o:debian:debian_linux:10.0, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:expat, p-cpe:/a:debian:debian_linux:libexpat1, p-cpe:/a:debian:debian_linux:libexpat1-dev, p-cpe:/a:debian:debian_linux:libexpat1-udeb

Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 10 / 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-5073 advisory.

- In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function in xmlparse.c can lead to realloc misbehavior (e.g., allocating too few bytes, or only freeing memory). (CVE-2021-45960)

- In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize. (CVE-2021-46143)

- addBinding in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. (CVE-2022-22822)

- build_model in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. (CVE-2022-22823)

- defineAttribute in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. (CVE-2022-22824)

- lookup in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. (CVE-2022-22825)

- nextScaffoldPart in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. (CVE-2022-22826)

- storeAtts in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. (CVE-2022-22827)

- Expat (aka libexpat) before 2.4.4 has a signed integer overflow in XML_GetBuffer, for configurations with a nonzero XML_CONTEXT_BYTES. (CVE-2022-23852)

- Expat (aka libexpat) before 2.4.4 has an integer overflow in the doProlog function. (CVE-2022-23990)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade the expat packages.

For the stable distribution (bullseye), these problems have been fixed in version 2.2.10-2+deb11u1.

Public Exploits

Target Network Port(s): N/A
Target Asset(s): N/A
Exploit Available: True (GitHub)
Exploit Ease: Exploits (PoCs) are available

Here's the list of publicly known exploits and PoCs for verifying the Debian DSA-5073-1 : expat - security update vulnerability:

GitHub: https://github.com/nanopathi/external_expat_AOSP10_r33_CVE-2021-45960
[CVE-2021-45960]
GitHub: https://github.com/nanopathi/external_expat_AOSP10_r33_CVE-2021-46143
[CVE-2021-46143]
GitHub: https://github.com/nanopathi/external_expat_AOSP10_r33_CVE-2022-22822toCVE-2022-22827
[CVE-2022-22822]
GitHub: https://github.com/nanopathi/external_expat_AOSP10_r33_CVE-2022-22822toCVE-2022-22827
[CVE-2022-22827]
GitHub: https://github.com/Nivaskumark/expat_A10_r33_2_2_6_CVE-2022-23990
[CVE-2022-23990]
GitHub: https://github.com/Satheesh575555/external_expat_AOSP10_r33_CVE-2022-23990
[CVE-2022-23990]

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-2021-45960
CVSS V2 Vector: AV:N/AC:L/Au:S/C:C/I:C/A:C/E:U/RL:OF/RC:C

CVSS Base Score:	9.0 (High)
Impact Subscore:	10.0
Exploitability Subscore:	8.0
CVSS Temporal Score:	6.7 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	6.7 (Medium)

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

CVSS Base Score:	8.8 (High)
Impact Subscore:	5.9
Exploitability Subscore:	2.8
CVSS Temporal Score:	7.7 (High)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	7.7 (High)

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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-5073. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

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

if (description)
{
  script_id(158031);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/02/13");

  script_cve_id(
    "CVE-2021-45960",
    "CVE-2021-46143",
    "CVE-2022-22822",
    "CVE-2022-22823",
    "CVE-2022-22824",
    "CVE-2022-22825",
    "CVE-2022-22826",
    "CVE-2022-22827",
    "CVE-2022-23852",
    "CVE-2022-23990"
  );

  script_name(english:"Debian DSA-5073-1 : expat - security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing one or more security-related updates.");
  script_set_attribute(attribute:"description", value:
"The remote Debian 10 / 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dsa-5073 advisory.

  - In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function in
    xmlparse.c can lead to realloc misbehavior (e.g., allocating too few bytes, or only freeing memory).
    (CVE-2021-45960)

  - In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for
    m_groupSize. (CVE-2021-46143)

  - addBinding in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. (CVE-2022-22822)

  - build_model in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. (CVE-2022-22823)

  - defineAttribute in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.
    (CVE-2022-22824)

  - lookup in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. (CVE-2022-22825)

  - nextScaffoldPart in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.
    (CVE-2022-22826)

  - storeAtts in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. (CVE-2022-22827)

  - Expat (aka libexpat) before 2.4.4 has a signed integer overflow in XML_GetBuffer, for configurations with
    a nonzero XML_CONTEXT_BYTES. (CVE-2022-23852)

  - Expat (aka libexpat) before 2.4.4 has an integer overflow in the doProlog function. (CVE-2022-23990)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1002994");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/expat");
  script_set_attribute(attribute:"see_also", value:"https://www.debian.org/security/2022/dsa-5073");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-45960");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-46143");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2022-22822");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2022-22823");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2022-22824");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2022-22825");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2022-22826");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2022-22827");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2022-23852");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2022-23990");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/buster/expat");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/expat");
  script_set_attribute(attribute:"solution", value:
"Upgrade the expat packages.

For the stable distribution (bullseye), these problems have been fixed in version 2.2.10-2+deb11u1.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-45960");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2022/01/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/02/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/02/13");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:expat");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libexpat1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libexpat1-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libexpat1-udeb");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:10.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:11.0");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Debian Local Security Checks");

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

  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/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);

var release = get_kb_item('Host/Debian/release');
if ( isnull(release) ) audit(AUDIT_OS_NOT, 'Debian');
var release = chomp(release);
if (! preg(pattern:"^(10)\.[0-9]+|^(11)\.[0-9]+", string:release)) audit(AUDIT_OS_NOT, 'Debian 10.0 / 11.0', 'Debian ' + release);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Debian', cpu);

var pkgs = [
    {'release': '10.0', 'prefix': 'expat', 'reference': '2.2.6-2+deb10u2'},
    {'release': '10.0', 'prefix': 'libexpat1', 'reference': '2.2.6-2+deb10u2'},
    {'release': '10.0', 'prefix': 'libexpat1-dev', 'reference': '2.2.6-2+deb10u2'},
    {'release': '10.0', 'prefix': 'libexpat1-udeb', 'reference': '2.2.6-2+deb10u2'},
    {'release': '11.0', 'prefix': 'expat', 'reference': '2.2.10-2+deb11u1'},
    {'release': '11.0', 'prefix': 'libexpat1', 'reference': '2.2.10-2+deb11u1'},
    {'release': '11.0', 'prefix': 'libexpat1-dev', 'reference': '2.2.10-2+deb11u1'},
    {'release': '11.0', 'prefix': 'libexpat1-udeb', 'reference': '2.2.10-2+deb11u1'}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var release = NULL;
  var prefix = NULL;
  var reference = NULL;
  if (!empty_or_null(package_array['release'])) release = package_array['release'];
  if (!empty_or_null(package_array['prefix'])) prefix = package_array['prefix'];
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (release && prefix && reference) {
    if (deb_check(release:release, prefix:prefix, reference:reference)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : deb_report_get()
  );
  exit(0);
}
else
{
  var tested = deb_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'expat / libexpat1 / libexpat1-dev / libexpat1-udeb');
}

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-5073.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\debian_DSA-5073.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/debian_DSA-5073.nasl

Go back to menu.

How to Run

Here is how to run the Debian DSA-5073-1 : expat - security update 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-5073-1 : expat - security update plugin ID 158031.
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-5073.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a debian_DSA-5073.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-5073.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-5073.nasl -t <IP/HOST>

Go back to menu.

References

See also:

Similar and related Nessus plugins:

160254 - Amazon Linux 2 : expat (ALAS-2022-1788)
159324 - CentOS 7 : expat (CESA-2022:1069)
157248 - Debian DLA-2904-1 : expat - LTS security update
158676 - Debian DLA-2935-1 : expat - LTS security update
159240 - EulerOS 2.0 SP8 : expat (EulerOS-SA-2022-1342)
159791 - EulerOS 2.0 SP9 : expat (EulerOS-SA-2022-1425)
159785 - EulerOS 2.0 SP9 : expat (EulerOS-SA-2022-1446)
159968 - EulerOS 2.0 SP10 : expat (EulerOS-SA-2022-1483)
160019 - EulerOS 2.0 SP10 : expat (EulerOS-SA-2022-1502)
160127 - EulerOS 2.0 SP5 : expat (EulerOS-SA-2022-1529)
160143 - EulerOS 2.0 SP8 : expat (EulerOS-SA-2022-1562)
160580 - EulerOS Virtualization 2.9.1 : expat (EulerOS-SA-2022-1605)
160602 - EulerOS Virtualization 2.9.0 : expat (EulerOS-SA-2022-1628)
160392 - F5 Networks BIG-IP : Multiple Expat vulnerabilities (K19473898)
160395 - F5 Networks BIG-IP : Expat vulnerability (K23231802)
160397 - F5 Networks BIG-IP : Expat vulnerabilities (K23421535)
160396 - F5 Networks BIG-IP : Expat vulnerabilities (K91589041)
157425 - Tenable Nessus 10.x < 10.1.1 / 8.x < 8.15.3 Third-Party Vulnerabilities (TNS-2022-05)
157092 - openSUSE 15 Security Update : expat (openSUSE-SU-2022:0178-1)
158222 - openSUSE 15 Security Update : expat (openSUSE-SU-2022:0498-1)
158998 - Oracle Linux 8 : expat (ELSA-2022-0951)
159295 - Oracle Linux 7 : expat (ELSA-2022-1069)
158997 - Oracle Linux 7 : expat (ELSA-2022-9227)
159057 - Oracle Linux 8 : expat (ELSA-2022-9232)
159000 - RHEL 8 : expat (RHSA-2022:0951)
159284 - RHEL 7 : expat (RHSA-2022:1069)
156769 - Slackware Linux 14.0 / 14.1 / 14.2 / current expat Multiple Vulnerabilities (SSA:2022-016-01)
157101 - SUSE SLED15 / SLES15 Security Update : expat (SUSE-SU-2022:0178-1)
157098 - SUSE SLED12 / SLES12 Security Update : expat (SUSE-SU-2022:0179-1)
158181 - SUSE SLES12 Security Update : expat (SUSE-SU-2022:0495-1)
158190 - SUSE SLED15 / SLES15 Security Update : expat (SUSE-SU-2022:0498-1)
157086 - SUSE SLES11 Security Update : expat (SUSE-SU-2022:14878-1)
157868 - SUSE SLES11 Security Update : expat (SUSE-SU-2022:14884-1)
158212 - Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 21.10 : Expat vulnerabilities (USN-5288-1)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file debian_DSA-5073.nasl version 1.2. For more plugins, visit the Nessus Plugin Library.

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Debian DSA-5073-1 : expat - security update - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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