Ubuntu 23.10 : GNU C Library vulnerabilities (USN-6620-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6620-1. 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(189908);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/02/13");

  script_cve_id("CVE-2023-6246", "CVE-2023-6779", "CVE-2023-6780");
  script_xref(name:"USN", value:"6620-1");

  script_name(english:"Ubuntu 23.10 : GNU C Library vulnerabilities (USN-6620-1)");

  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 23.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the
USN-6620-1 advisory.

  - A heap-based buffer overflow was found in the __vsyslog_internal function of the glibc library. This
    function is called by the syslog and vsyslog functions. This issue occurs when the openlog function was
    not called, or called with the ident argument set to NULL, and the program name (the basename of argv[0])
    is bigger than 1024 bytes, resulting in an application crash or local privilege escalation. This issue
    affects glibc 2.36 and newer. (CVE-2023-6246)

  - An off-by-one heap-based buffer overflow was found in the __vsyslog_internal function of the glibc
    library. This function is called by the syslog and vsyslog functions. This issue occurs when these
    functions are called with a message bigger than INT_MAX bytes, leading to an incorrect calculation of the
    buffer size to store the message, resulting in an application crash. This issue affects glibc 2.37 and
    newer. (CVE-2023-6779)

  - An integer overflow was found in the __vsyslog_internal function of the glibc library. This function is
    called by the syslog and vsyslog functions. This issue occurs when these functions are called with a very
    long message, leading to an incorrect calculation of the buffer size to store the message, resulting in
    undefined behavior. This issue affects glibc 2.37 and newer. (CVE-2023-6780)

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-6620-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C");
  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:L/UI:N/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-2023-6246");

  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:"2024/01/30");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/02/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/02/01");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:23.10");
  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 (! ('23.10' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 23.10', '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': '23.10', 'pkgname': 'glibc-source', 'pkgver': '2.38-1ubuntu6.1'},
    {'osver': '23.10', 'pkgname': 'libc-bin', 'pkgver': '2.38-1ubuntu6.1'},
    {'osver': '23.10', 'pkgname': 'libc-dev-bin', 'pkgver': '2.38-1ubuntu6.1'},
    {'osver': '23.10', 'pkgname': 'libc-devtools', 'pkgver': '2.38-1ubuntu6.1'},
    {'osver': '23.10', 'pkgname': 'libc6', 'pkgver': '2.38-1ubuntu6.1'},
    {'osver': '23.10', 'pkgname': 'libc6-amd64', 'pkgver': '2.38-1ubuntu6.1'},
    {'osver': '23.10', 'pkgname': 'libc6-dev', 'pkgver': '2.38-1ubuntu6.1'},
    {'osver': '23.10', 'pkgname': 'libc6-dev-amd64', 'pkgver': '2.38-1ubuntu6.1'},
    {'osver': '23.10', 'pkgname': 'libc6-dev-i386', 'pkgver': '2.38-1ubuntu6.1'},
    {'osver': '23.10', 'pkgname': 'libc6-dev-s390', 'pkgver': '2.38-1ubuntu6.1'},
    {'osver': '23.10', 'pkgname': 'libc6-dev-x32', 'pkgver': '2.38-1ubuntu6.1'},
    {'osver': '23.10', 'pkgname': 'libc6-i386', 'pkgver': '2.38-1ubuntu6.1'},
    {'osver': '23.10', 'pkgname': 'libc6-prof', 'pkgver': '2.38-1ubuntu6.1'},
    {'osver': '23.10', 'pkgname': 'libc6-s390', 'pkgver': '2.38-1ubuntu6.1'},
    {'osver': '23.10', 'pkgname': 'libc6-x32', 'pkgver': '2.38-1ubuntu6.1'},
    {'osver': '23.10', 'pkgname': 'locales', 'pkgver': '2.38-1ubuntu6.1'},
    {'osver': '23.10', 'pkgname': 'locales-all', 'pkgver': '2.38-1ubuntu6.1'},
    {'osver': '23.10', 'pkgname': 'nscd', 'pkgver': '2.38-1ubuntu6.1'}
];

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, 'glibc-source / libc-bin / libc-dev-bin / libc-devtools / libc6 / etc');
}