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nessusUbuntu Security Notice (C) 2022-2023 Canonical, Inc. / NASL script (C) 2022-2023 and is owned by Tenable, Inc. or an Affiliate thereof.UBUNTU_USN-5476-1.NASL
HistoryJun 13, 2022 - 12:00 a.m.

Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS : Liblouis vulnerabilities (USN-5476-1)

2022-06-1300:00:00
Ubuntu Security Notice (C) 2022-2023 Canonical, Inc. / NASL script (C) 2022-2023 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
16

6.8 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:P/A:P

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

0.001 Low

EPSS

Percentile

42.6%

The remote Ubuntu 18.04 LTS / 20.04 LTS / 21.10 / 22.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-5476-1 advisory.

  • Liblouis through 3.21.0 has a buffer overflow in compilePassOpcode in compileTranslationTable.c (called, indirectly, by tools/lou_checktable.c). (CVE-2022-26981)

  • Liblouis 3.21.0 has an out-of-bounds write in compileRule in compileTranslationTable.c, as demonstrated by lou_trace. (CVE-2022-31783)

Note that Nessus has not tested for these issues but has instead relied only on the application’s self-reported version number.

##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-5476-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##

include('compat.inc');

if (description)
{
  script_id(162172);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/16");

  script_cve_id("CVE-2022-26981", "CVE-2022-31783");
  script_xref(name:"USN", value:"5476-1");

  script_name(english:"Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS : Liblouis vulnerabilities (USN-5476-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 18.04 LTS / 20.04 LTS / 21.10 / 22.04 LTS host has packages installed that are affected by multiple
vulnerabilities as referenced in the USN-5476-1 advisory.

  - Liblouis through 3.21.0 has a buffer overflow in compilePassOpcode in compileTranslationTable.c (called,
    indirectly, by tools/lou_checktable.c). (CVE-2022-26981)

  - Liblouis 3.21.0 has an out-of-bounds write in compileRule in compileTranslationTable.c, as demonstrated by
    lou_trace. (CVE-2022-31783)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/notices/USN-5476-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2022-26981");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2022/03/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/06/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/06/13");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:liblouis-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:liblouis-data");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:liblouis-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:liblouis14");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:liblouis20");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python-louis");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-louis");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2022-2023 Canonical, Inc. / NASL script (C) 2022-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}

include('debian_package.inc');

if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('18.04' >< os_release || '20.04' >< os_release || '22.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 18.04 / 20.04 / 22.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);

var pkgs = [
    {'osver': '18.04', 'pkgname': 'liblouis-bin', 'pkgver': '3.5.0-1ubuntu0.4'},
    {'osver': '18.04', 'pkgname': 'liblouis-data', 'pkgver': '3.5.0-1ubuntu0.4'},
    {'osver': '18.04', 'pkgname': 'liblouis-dev', 'pkgver': '3.5.0-1ubuntu0.4'},
    {'osver': '18.04', 'pkgname': 'liblouis14', 'pkgver': '3.5.0-1ubuntu0.4'},
    {'osver': '18.04', 'pkgname': 'python-louis', 'pkgver': '3.5.0-1ubuntu0.4'},
    {'osver': '18.04', 'pkgname': 'python3-louis', 'pkgver': '3.5.0-1ubuntu0.4'},
    {'osver': '20.04', 'pkgname': 'liblouis-bin', 'pkgver': '3.12.0-3ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'liblouis-data', 'pkgver': '3.12.0-3ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'liblouis-dev', 'pkgver': '3.12.0-3ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'liblouis20', 'pkgver': '3.12.0-3ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'python3-louis', 'pkgver': '3.12.0-3ubuntu0.1'},
    {'osver': '22.04', 'pkgname': 'liblouis-bin', 'pkgver': '3.20.0-2ubuntu0.1'},
    {'osver': '22.04', 'pkgname': 'liblouis-data', 'pkgver': '3.20.0-2ubuntu0.1'},
    {'osver': '22.04', 'pkgname': 'liblouis-dev', 'pkgver': '3.20.0-2ubuntu0.1'},
    {'osver': '22.04', 'pkgname': 'liblouis20', 'pkgver': '3.20.0-2ubuntu0.1'},
    {'osver': '22.04', 'pkgname': 'python3-louis', 'pkgver': '3.20.0-2ubuntu0.1'}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var osver = NULL;
  var pkgname = NULL;
  var pkgver = NULL;
  if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
  if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
  if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
  if (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'liblouis-bin / liblouis-data / liblouis-dev / liblouis14 / etc');
}
VendorProductVersionCPE
canonicalubuntu_linux18.04cpe:/o:canonical:ubuntu_linux:18.04:-:lts
canonicalubuntu_linux20.04cpe:/o:canonical:ubuntu_linux:20.04:-:lts
canonicalubuntu_linux22.04cpe:/o:canonical:ubuntu_linux:22.04:-:lts
canonicalubuntu_linuxliblouis-binp-cpe:/a:canonical:ubuntu_linux:liblouis-bin
canonicalubuntu_linuxliblouis-datap-cpe:/a:canonical:ubuntu_linux:liblouis-data
canonicalubuntu_linuxliblouis-devp-cpe:/a:canonical:ubuntu_linux:liblouis-dev
canonicalubuntu_linuxliblouis14p-cpe:/a:canonical:ubuntu_linux:liblouis14
canonicalubuntu_linuxliblouis20p-cpe:/a:canonical:ubuntu_linux:liblouis20
canonicalubuntu_linuxpython-louisp-cpe:/a:canonical:ubuntu_linux:python-louis
canonicalubuntu_linuxpython3-louisp-cpe:/a:canonical:ubuntu_linux:python3-louis

6.8 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:P/A:P

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

0.001 Low

EPSS

Percentile

42.6%