Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS : GLib vulnerabilities (USN-8794-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-8794-1. 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(350297);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/25");

  script_cve_id(
    "CVE-2026-15588",
    "CVE-2026-16118",
    "CVE-2026-58010",
    "CVE-2026-58011",
    "CVE-2026-58012",
    "CVE-2026-58013",
    "CVE-2026-58014",
    "CVE-2026-58015",
    "CVE-2026-58016"
  );
  script_xref(name:"USN", value:"8794-1");

  script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS : GLib vulnerabilities (USN-8794-1)");

  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 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS host has packages
installed that are affected by multiple vulnerabilities as referenced in the USN-8794-1 advisory.

    It was discovered that GLib's GDBus authentication mechanism failed to enforce length limitations on data
    lines read from a client. An unauthenticated attacker could exploit this to cause a denial of service via
    resource exhaustion. (CVE-2026-15588)

    It was discovered that the xdgmime library in GLib had a heap-based buffer overflow. An attacker-
    controlled MIME magic file could cause an out-of-bounds write on little-endian systems. (CVE-2026-16118)

    It was discovered that GLib had an off-by-one error in the GVariant serialiser. An attacker could use this
    to cause an out-of-bounds read, leading to information disclosure or a denial of service. (CVE-2026-58010)

    It was discovered that GLib had an out-of-bounds read in GDateTime. An attacker could use this to corrupt
    date output and cause a denial of service. (CVE-2026-58011)

    It was discovered that GLib's g_regex_replace() function had a buffer over-read when used with the
    G_REGEX_RAW flag. An attacker could use this to cause information disclosure or a denial of service.
    (CVE-2026-58012)

    It was discovered that GLib's GIOChannel had a buffer over-read when using a custom line terminator. An
    attacker could use this to cause information disclosure or a denial of service. (CVE-2026-58013)

    It was discovered that GLib's GKeyFile had an off-by-one error when loading a key file with an empty
    value. An attacker could use this to cause an out-of-bounds access or a denial of service.
    (CVE-2026-58014)

    It was discovered that GLib's DBUS_COOKIE_SHA1 authentication mechanism failed to validate the
    cookie_context parameter. A malicious D-Bus server could use this to read arbitrary files from the client.
    (CVE-2026-58015)

    It was discovered that GLib's D-Bus introspection XML parser had a state confusion issue. An attacker
    could use this to cause an out-of-bounds read and denial of service. (CVE-2026-58016)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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-8794-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/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:N/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-2026-58016");

  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:"2026/06/30");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/25");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  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:"cpe:/o:canonical:ubuntu_linux:24.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:26.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:gir1.2-girepository-3.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:gir1.2-glib-2.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:girepository-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libgio-2.0-dev-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libgirepository-2.0-0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libglib2.0-0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libglib2.0-0-refdbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libglib2.0-0t64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libglib2.0-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libglib2.0-data");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libglib2.0-dev-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libglib2.0-tests");
  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) 2026 Canonical, Inc. / NASL script (C) 2026 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 (! ('14.04' >< os_release || '16.04' >< os_release || '18.04' >< os_release || '20.04' >< os_release || '22.04' >< os_release || '24.04' >< os_release || '26.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 14.04 / 16.04 / 18.04 / 20.04 / 22.04 / 24.04 / 26.04', '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': '14.04', 'pkgname': 'libglib2.0-0', 'pkgver': '2.40.2-0ubuntu1.1+esm8'},
    {'osver': '14.04', 'pkgname': 'libglib2.0-0-refdbg', 'pkgver': '2.40.2-0ubuntu1.1+esm8'},
    {'osver': '14.04', 'pkgname': 'libglib2.0-bin', 'pkgver': '2.40.2-0ubuntu1.1+esm8'},
    {'osver': '14.04', 'pkgname': 'libglib2.0-data', 'pkgver': '2.40.2-0ubuntu1.1+esm8'},
    {'osver': '14.04', 'pkgname': 'libglib2.0-tests', 'pkgver': '2.40.2-0ubuntu1.1+esm8'},
    {'osver': '16.04', 'pkgname': 'libglib2.0-0', 'pkgver': '2.48.2-0ubuntu4.8+esm6'},
    {'osver': '16.04', 'pkgname': 'libglib2.0-0-refdbg', 'pkgver': '2.48.2-0ubuntu4.8+esm6'},
    {'osver': '16.04', 'pkgname': 'libglib2.0-bin', 'pkgver': '2.48.2-0ubuntu4.8+esm6'},
    {'osver': '16.04', 'pkgname': 'libglib2.0-data', 'pkgver': '2.48.2-0ubuntu4.8+esm6'},
    {'osver': '16.04', 'pkgname': 'libglib2.0-tests', 'pkgver': '2.48.2-0ubuntu4.8+esm6'},
    {'osver': '18.04', 'pkgname': 'libglib2.0-0', 'pkgver': '2.56.4-0ubuntu0.18.04.9+esm6'},
    {'osver': '18.04', 'pkgname': 'libglib2.0-bin', 'pkgver': '2.56.4-0ubuntu0.18.04.9+esm6'},
    {'osver': '18.04', 'pkgname': 'libglib2.0-data', 'pkgver': '2.56.4-0ubuntu0.18.04.9+esm6'},
    {'osver': '18.04', 'pkgname': 'libglib2.0-dev-bin', 'pkgver': '2.56.4-0ubuntu0.18.04.9+esm6'},
    {'osver': '18.04', 'pkgname': 'libglib2.0-tests', 'pkgver': '2.56.4-0ubuntu0.18.04.9+esm6'},
    {'osver': '20.04', 'pkgname': 'libglib2.0-0', 'pkgver': '2.64.6-1~ubuntu20.04.9+esm2'},
    {'osver': '20.04', 'pkgname': 'libglib2.0-bin', 'pkgver': '2.64.6-1~ubuntu20.04.9+esm2'},
    {'osver': '20.04', 'pkgname': 'libglib2.0-data', 'pkgver': '2.64.6-1~ubuntu20.04.9+esm2'},
    {'osver': '20.04', 'pkgname': 'libglib2.0-dev-bin', 'pkgver': '2.64.6-1~ubuntu20.04.9+esm2'},
    {'osver': '20.04', 'pkgname': 'libglib2.0-tests', 'pkgver': '2.64.6-1~ubuntu20.04.9+esm2'},
    {'osver': '22.04', 'pkgname': 'libglib2.0-0', 'pkgver': '2.72.4-0ubuntu2.10'},
    {'osver': '22.04', 'pkgname': 'libglib2.0-bin', 'pkgver': '2.72.4-0ubuntu2.10'},
    {'osver': '22.04', 'pkgname': 'libglib2.0-data', 'pkgver': '2.72.4-0ubuntu2.10'},
    {'osver': '22.04', 'pkgname': 'libglib2.0-dev-bin', 'pkgver': '2.72.4-0ubuntu2.10'},
    {'osver': '22.04', 'pkgname': 'libglib2.0-tests', 'pkgver': '2.72.4-0ubuntu2.10'},
    {'osver': '24.04', 'pkgname': 'gir1.2-girepository-3.0', 'pkgver': '2.80.0-6ubuntu3.9'},
    {'osver': '24.04', 'pkgname': 'gir1.2-glib-2.0', 'pkgver': '2.80.0-6ubuntu3.9'},
    {'osver': '24.04', 'pkgname': 'libgirepository-2.0-0', 'pkgver': '2.80.0-6ubuntu3.9'},
    {'osver': '24.04', 'pkgname': 'libglib2.0-0t64', 'pkgver': '2.80.0-6ubuntu3.9'},
    {'osver': '24.04', 'pkgname': 'libglib2.0-bin', 'pkgver': '2.80.0-6ubuntu3.9'},
    {'osver': '24.04', 'pkgname': 'libglib2.0-data', 'pkgver': '2.80.0-6ubuntu3.9'},
    {'osver': '24.04', 'pkgname': 'libglib2.0-dev-bin', 'pkgver': '2.80.0-6ubuntu3.9'},
    {'osver': '24.04', 'pkgname': 'libglib2.0-tests', 'pkgver': '2.80.0-6ubuntu3.9'},
    {'osver': '26.04', 'pkgname': 'gir1.2-girepository-3.0', 'pkgver': '2.88.0-1ubuntu0.1'},
    {'osver': '26.04', 'pkgname': 'gir1.2-glib-2.0', 'pkgver': '2.88.0-1ubuntu0.1'},
    {'osver': '26.04', 'pkgname': 'girepository-tools', 'pkgver': '2.88.0-1ubuntu0.1'},
    {'osver': '26.04', 'pkgname': 'libgio-2.0-dev-bin', 'pkgver': '2.88.0-1ubuntu0.1'},
    {'osver': '26.04', 'pkgname': 'libgirepository-2.0-0', 'pkgver': '2.88.0-1ubuntu0.1'},
    {'osver': '26.04', 'pkgname': 'libglib2.0-0t64', 'pkgver': '2.88.0-1ubuntu0.1'},
    {'osver': '26.04', 'pkgname': 'libglib2.0-bin', 'pkgver': '2.88.0-1ubuntu0.1'},
    {'osver': '26.04', 'pkgname': 'libglib2.0-data', 'pkgver': '2.88.0-1ubuntu0.1'},
    {'osver': '26.04', 'pkgname': 'libglib2.0-dev-bin', 'pkgver': '2.88.0-1ubuntu0.1'},
    {'osver': '26.04', 'pkgname': 'libglib2.0-tests', 'pkgver': '2.88.0-1ubuntu0.1'}
];

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

if (flag)
{
  var extra = '';
  extra += ubuntu_report_get();
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : extra
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'gir1.2-girepository-3.0 / gir1.2-glib-2.0 / girepository-tools / etc');
}