Ubuntu 22.04 LTS : GNU C Library regression (USN-6541-2)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6541-2. 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(187919);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/27");
  script_xref(name:"USN", value:"6541-2");

  script_name(english:"Ubuntu 22.04 LTS : GNU C Library regression (USN-6541-2)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 22.04 LTS host has packages installed that are affected by a vulnerability as referenced in the
USN-6541-2 advisory.

    USN-6541-1 fixed vulnerabilities in the GNU C Library. Unfortunately, changes made to allow proper
    application of the fix for CVE-2023-4806 in Ubuntu 22.04 LTS introduced an issue in the NSCD service IPv6
    processing functionalities. This update fixes the problem.

    We apologize for the inconvenience.

    Original advisory details:

    It was discovered that the GNU C Library was not properly handling certain

    memory operations. An attacker could possibly use this issue to cause a

    denial of service (application crash). (CVE-2023-4806, CVE-2023-4813)

    It was discovered that the GNU C library was not properly implementing a

    fix for CVE-2023-4806 in certain cases, which could lead to a memory leak.

    An attacker could possibly use this issue to cause a denial of service

    (application crash). This issue only affected Ubuntu 22.04 LTS and Ubuntu

    23.04. (CVE-2023-5156)

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

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://ubuntu.com/security/notices/USN-6541-2");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_attribute(attribute:"risk_factor", value:"None");

  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:"2024/01/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/01/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/01/10");

  script_set_attribute(attribute:"plugin_type", value:"local");
  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:glibc-source");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc-dev-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc-devtools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-amd64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-dev-amd64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-dev-i386");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-dev-s390");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-dev-x32");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-i386");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-prof");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-s390");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libc6-x32");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:locales");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:locales-all");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:nscd");
  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) 2024 Canonical, Inc. / NASL script (C) 2024 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 (! ('22.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 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': '22.04', 'pkgname': 'glibc-source', 'pkgver': '2.35-0ubuntu3.6'},
    {'osver': '22.04', 'pkgname': 'libc-bin', 'pkgver': '2.35-0ubuntu3.6'},
    {'osver': '22.04', 'pkgname': 'libc-dev-bin', 'pkgver': '2.35-0ubuntu3.6'},
    {'osver': '22.04', 'pkgname': 'libc-devtools', 'pkgver': '2.35-0ubuntu3.6'},
    {'osver': '22.04', 'pkgname': 'libc6', 'pkgver': '2.35-0ubuntu3.6'},
    {'osver': '22.04', 'pkgname': 'libc6-amd64', 'pkgver': '2.35-0ubuntu3.6'},
    {'osver': '22.04', 'pkgname': 'libc6-dev', 'pkgver': '2.35-0ubuntu3.6'},
    {'osver': '22.04', 'pkgname': 'libc6-dev-amd64', 'pkgver': '2.35-0ubuntu3.6'},
    {'osver': '22.04', 'pkgname': 'libc6-dev-i386', 'pkgver': '2.35-0ubuntu3.6'},
    {'osver': '22.04', 'pkgname': 'libc6-dev-s390', 'pkgver': '2.35-0ubuntu3.6'},
    {'osver': '22.04', 'pkgname': 'libc6-dev-x32', 'pkgver': '2.35-0ubuntu3.6'},
    {'osver': '22.04', 'pkgname': 'libc6-i386', 'pkgver': '2.35-0ubuntu3.6'},
    {'osver': '22.04', 'pkgname': 'libc6-prof', 'pkgver': '2.35-0ubuntu3.6'},
    {'osver': '22.04', 'pkgname': 'libc6-s390', 'pkgver': '2.35-0ubuntu3.6'},
    {'osver': '22.04', 'pkgname': 'libc6-x32', 'pkgver': '2.35-0ubuntu3.6'},
    {'osver': '22.04', 'pkgname': 'locales', 'pkgver': '2.35-0ubuntu3.6'},
    {'osver': '22.04', 'pkgname': 'locales-all', 'pkgver': '2.35-0ubuntu3.6'},
    {'osver': '22.04', 'pkgname': 'nscd', 'pkgver': '2.35-0ubuntu3.6'}
];

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 (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
  }
}

if (flag)
{
  var extra = '';
  extra += ubuntu_report_get();
  security_report_v4(
    port       : 0,
    severity   : SECURITY_NOTE,
    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, 'glibc-source / libc-bin / libc-dev-bin / libc-devtools / libc6 / etc');
}