Debian dsa-6143 : libvpx-dev - security update

#%NASL_MIN_LEVEL 80900
#
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dsa-6143. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(299632);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/02/19");

  script_cve_id("CVE-2026-2447");

  script_name(english:"Debian dsa-6143 : libvpx-dev - security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security-related update.");
  script_set_attribute(attribute:"description", value:
"The remote Debian 12 / 13 host has packages installed that are affected by a vulnerability as referenced in the dsa-6143
advisory.

    - -------------------------------------------------------------------------
    Debian Security Advisory DSA-6143-1                   [email protected]
    https://www.debian.org/security/                       Moritz Muehlenhoff
    February 19, 2026                     https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : libvpx
    CVE ID         : CVE-2026-2447

    A buffer overflow was discovered in libvpx, a library implementing the
    VP8/VP9 open video codecs, which could result in denial of service or
    potentially the execution of arbitrary code.

    For the oldstable distribution (bookworm), these problems have been fixed
    in version 1.12.0-1+deb12u5.

    For the stable distribution (trixie), these problems have been fixed in
    version 1.15.0-2.1+deb13u1.

    We recommend that you upgrade your libvpx packages.

    For the detailed security status of libvpx please refer to
    its security tracker page at:
    https://security-tracker.debian.org/tracker/libvpx

    Further information about Debian Security Advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at: https://www.debian.org/security/

    Mailing list: [email protected]

Tenable has extracted the preceding description block directly from the Debian 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://security-tracker.debian.org/tracker/source-package/libvpx");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-2447");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bookworm/libvpx");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/trixie/libvpx");
  script_set_attribute(attribute:"solution", value:
"Upgrade the libvpx-dev packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-2447");

  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:"2026/02/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/02/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/02/19");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libvpx-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libvpx-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libvpx7");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libvpx9");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:vpx-tools");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:12.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:13.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/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);
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);

var debian_release = get_kb_item('Host/Debian/release');
if ( isnull(debian_release) ) audit(AUDIT_OS_NOT, 'Debian');
debian_release = chomp(debian_release);
if (! preg(pattern:"^(12)\.[0-9]+|^(13)\.[0-9]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 12.0 / 13.0', 'Debian ' + debian_release);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Debian', cpu);

var pkgs = [
    {'release': '12.0', 'prefix': 'libvpx-dev', 'reference': '1.12.0-1+deb12u5'},
    {'release': '12.0', 'prefix': 'libvpx-doc', 'reference': '1.12.0-1+deb12u5'},
    {'release': '12.0', 'prefix': 'libvpx7', 'reference': '1.12.0-1+deb12u5'},
    {'release': '12.0', 'prefix': 'vpx-tools', 'reference': '1.12.0-1+deb12u5'},
    {'release': '13.0', 'prefix': 'libvpx-dev', 'reference': '1.15.0-2.1+deb13u1'},
    {'release': '13.0', 'prefix': 'libvpx-doc', 'reference': '1.15.0-2.1+deb13u1'},
    {'release': '13.0', 'prefix': 'libvpx9', 'reference': '1.15.0-2.1+deb13u1'},
    {'release': '13.0', 'prefix': 'vpx-tools', 'reference': '1.15.0-2.1+deb13u1'}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var _release = NULL;
  var prefix = NULL;
  var reference = NULL;
  if (!empty_or_null(package_array['release'])) _release = package_array['release'];
  if (!empty_or_null(package_array['prefix'])) prefix = package_array['prefix'];
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (_release && prefix && reference) {
    if (deb_check(release:_release, prefix:prefix, reference:reference)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : deb_report_get()
  );
  exit(0);
}
else
{
  var tested = deb_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'libvpx-dev / libvpx-doc / libvpx7 / libvpx9 / vpx-tools');
}