Ubuntu 16.04 ESM / 18.04 ESM / 20.04 ESM / 22.04 ESM : xmltok library vulnerabilities (USN-5455-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-5455-1. 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(183151);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/17");

  script_cve_id(
    "CVE-2012-1148",
    "CVE-2015-1283",
    "CVE-2016-0718",
    "CVE-2016-4472",
    "CVE-2018-20843",
    "CVE-2019-15903",
    "CVE-2021-46143",
    "CVE-2022-22822",
    "CVE-2022-22823",
    "CVE-2022-22824",
    "CVE-2022-22825",
    "CVE-2022-22826",
    "CVE-2022-22827",
    "CVE-2022-25235",
    "CVE-2022-25236"
  );
  script_xref(name:"USN", value:"5455-1");
  script_xref(name:"CEA-ID", value:"CEA-2021-0025");

  script_name(english:"Ubuntu 16.04 ESM / 18.04 ESM / 20.04 ESM / 22.04 ESM : xmltok library vulnerabilities (USN-5455-1)");

  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 16.04 ESM / 18.04 ESM / 20.04 ESM / 22.04 ESM host has packages installed that are affected by
multiple vulnerabilities as referenced in the USN-5455-1 advisory.

  - Memory leak in the poolGrow function in expat/lib/xmlparse.c in expat before 2.1.0 allows context-
    dependent attackers to cause a denial of service (memory consumption) via a large number of crafted XML
    files that cause improperly-handled reallocation failures when expanding entities. (CVE-2012-1148)

  - Multiple integer overflows in the XML_GetBuffer function in Expat through 2.1.0, as used in Google Chrome
    before 44.0.2403.89 and other products, allow remote attackers to cause a denial of service (heap-based
    buffer overflow) or possibly have unspecified other impact via crafted XML data, a related issue to
    CVE-2015-2716. (CVE-2015-1283)

  - Expat allows context-dependent attackers to cause a denial of service (crash) or possibly execute
    arbitrary code via a malformed input document, which triggers a buffer overflow. (CVE-2016-0718)

  - The overflow protection in Expat is removed by compilers with certain optimization settings, which allows
    remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via crafted XML
    data. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-1283 and CVE-2015-2716.
    (CVE-2016-4472)

  - In libexpat in Expat before 2.2.7, XML input including XML names that contain a large number of colons
    could make the XML parser consume a high amount of RAM and CPU resources while processing (enough to be
    usable for denial-of-service attacks). (CVE-2018-20843)

  - In libexpat before 2.2.8, crafted XML input could fool the parser into changing from DTD parsing to
    document parsing too early; a consecutive call to XML_GetCurrentLineNumber (or XML_GetCurrentColumnNumber)
    then resulted in a heap-based buffer over-read. (CVE-2019-15903)

  - 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)

  - xmltok_impl.c in Expat (aka libexpat) before 2.4.5 lacks certain validation of encoding, such as checks
    for whether a UTF-8 character is valid in a certain context. (CVE-2022-25235)

  - xmlparse.c in Expat (aka libexpat) before 2.4.5 allows attackers to insert namespace-separator characters
    into namespace URIs. (CVE-2022-25236)

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-5455-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected libxmltok1 and / or libxmltok1-dev packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/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:"cvss_score_source", value:"CVE-2022-25236");

  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:"2012/03/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/07/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/10/16");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:esm");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:esm");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:esm");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:esm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libxmltok1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libxmltok1-dev");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2023 Canonical, Inc. / NASL script (C) 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 (! ('16.04' >< os_release || '18.04' >< os_release || '20.04' >< os_release || '22.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04 / 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': '16.04', 'pkgname': 'libxmltok1', 'pkgver': '1.2-3ubuntu0.16.04.1~esm2'},
    {'osver': '16.04', 'pkgname': 'libxmltok1-dev', 'pkgver': '1.2-3ubuntu0.16.04.1~esm2'},
    {'osver': '18.04', 'pkgname': 'libxmltok1', 'pkgver': '1.2-4ubuntu0.18.04.1~esm1'},
    {'osver': '18.04', 'pkgname': 'libxmltok1-dev', 'pkgver': '1.2-4ubuntu0.18.04.1~esm1'},
    {'osver': '20.04', 'pkgname': 'libxmltok1', 'pkgver': '1.2-4ubuntu0.20.04.1~esm1'},
    {'osver': '20.04', 'pkgname': 'libxmltok1-dev', 'pkgver': '1.2-4ubuntu0.20.04.1~esm1'},
    {'osver': '22.04', 'pkgname': 'libxmltok1', 'pkgver': '1.2-4ubuntu0.22.04.1~esm1'},
    {'osver': '22.04', 'pkgname': 'libxmltok1-dev', 'pkgver': '1.2-4ubuntu0.22.04.1~esm1'}
];

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_HOLE,
    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, 'libxmltok1 / libxmltok1-dev');
}