Debian dla-4719 : p7zip - security update

#%NASL_MIN_LEVEL 80900
#
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dla-4719. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(332780);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/08/05");

  script_cve_id("CVE-2026-14266", "CVE-2026-58052");

  script_name(english:"Debian dla-4719 : p7zip - security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing one or more security-related updates.");
  script_set_attribute(attribute:"description", value:
"The remote Debian 11 / 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dla-4719 advisory.

    - -------------------------------------------------------------------------
    Debian LTS Advisory DLA-4719-1                [email protected]
    https://www.debian.org/lts/security/                      Sylvain Beucler
    August 05, 2026                               https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : p7zip
    Version        : 16.02+really26.02+dfsg-0+deb11u1
                     16.02+really26.02+dfsg-0+deb12u1
    CVE ID         : CVE-2026-14266 CVE-2026-58052
    Debian Bug     : 1142293

    Multiple vulnerabilities were discovered in p7zip, a now unmaintained
    fork of 7-Zip, which itself is a file archiver handling multiple
    formats.

    To address these security vulnerabilities, whose fixes unfortunately
    cannot be isolated, this update again replaces p7zip with a recent
    7-Zip (now v26.02), slightly modified to make it reasonably compatible
    with p7zip.

    Among the fixed vulnerabilities, the following were made public:

    CVE-2026-14266

        XZ decompression heap-based buffer overflow, potentially leading
        to remote code execution.

    CVE-2026-58052

        RAR5 alternate-stream handling issue, when running on an NTFS
        filesystem with transparent ADS (Alternate Data Stream) and ADS
        canonicalization, letting an attacker defeat Mark-of-the-Web
        warnings and spoof file content.

    For Debian 11 bullseye, these problems have been fixed in version
    16.02+really26.02+dfsg-0+deb11u1.

    For Debian 12 bookworm, these problems have been fixed in version
    16.02+really26.02+dfsg-0+deb12u1.

    We recommend that you upgrade your p7zip packages.

    For the detailed security status of p7zip please refer to
    its security tracker page at:
    https://security-tracker.debian.org/tracker/p7zip

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

Tenable has extracted the preceding description block directly from the Debian 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://security-tracker.debian.org/tracker/source-package/p7zip");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-14266");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-58052");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bookworm/p7zip");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/p7zip");
  script_set_attribute(attribute:"solution", value:
"Upgrade the p7zip packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:H/Au:N/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:H/PR:N/UI:R/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:"cvss4_vector", value:"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:P");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-14266");
  script_set_attribute(attribute:"cvss4_score_source", value:"CVE-2026-58052");

  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:"2026/06/28");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/08/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/08/05");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:p7zip");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:p7zip-full");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:11.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:12.0");
  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:"^(11)\.[0-9]+|^(12)\.[0-9]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 11.0 / 12.0', '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': '11.0', 'prefix': 'p7zip', 'reference': '16.02+really26.02+dfsg-0+deb11u1'},
    {'release': '11.0', 'prefix': 'p7zip-full', 'reference': '16.02+really26.02+dfsg-0+deb11u1'},
    {'release': '12.0', 'prefix': 'p7zip', 'reference': '16.02+really26.02+dfsg-0+deb12u1'},
    {'release': '12.0', 'prefix': 'p7zip-full', 'reference': '16.02+really26.02+dfsg-0+deb12u1'}
];

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_WARNING,
    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, 'p7zip / p7zip-full');
}