Debian dsa-5871 : emacs - 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-5871. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(216930);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/09/26");

  script_cve_id("CVE-2024-53920", "CVE-2025-1244");

  script_name(english:"Debian dsa-5871 : emacs - 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 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dsa-5871 advisory.

    - -------------------------------------------------------------------------
    Debian Security Advisory DSA-5871-1                   [email protected]
    https://www.debian.org/security/                       Moritz Muehlenhoff
    February 27, 2025                     https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : emacs
    CVE ID         : CVE-2024-53920 CVE-2025-1244

    Two security vulnerabilities were discovered in Emacs:

    CVE-2024-53920

        Elisp byte-compilation ('elisp-flymake-byte-compile') in the Flymake
        mode is now disabled for untrusted files.

    CVE-2025-1244

        An incomplete escaping of shell meta characters in the man reader
        component could potentially result in the execution of arbitrary
        shell commands. Discovered by Maxim Nikulin.

    For the stable distribution (bookworm), these problems have been fixed in
    version 1:28.2+1-15+deb12u4.

    We recommend that you upgrade your emacs packages.

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

    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 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/emacs");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-53920");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-1244");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bookworm/emacs");
  script_set_attribute(attribute:"solution", value:
"Upgrade the emacs 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-2025-1244");

  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:"2024/11/27");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/02/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/02/28");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:emacs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:emacs-bin-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:emacs-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:emacs-el");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:emacs-gtk");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:emacs-lucid");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:emacs-nox");
  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) 2025 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]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 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': '12.0', 'prefix': 'emacs', 'reference': '1:28.2+1-15+deb12u4'},
    {'release': '12.0', 'prefix': 'emacs-bin-common', 'reference': '1:28.2+1-15+deb12u4'},
    {'release': '12.0', 'prefix': 'emacs-common', 'reference': '1:28.2+1-15+deb12u4'},
    {'release': '12.0', 'prefix': 'emacs-el', 'reference': '1:28.2+1-15+deb12u4'},
    {'release': '12.0', 'prefix': 'emacs-gtk', 'reference': '1:28.2+1-15+deb12u4'},
    {'release': '12.0', 'prefix': 'emacs-lucid', 'reference': '1:28.2+1-15+deb12u4'},
    {'release': '12.0', 'prefix': 'emacs-nox', 'reference': '1:28.2+1-15+deb12u4'}
];

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, 'emacs / emacs-bin-common / emacs-common / emacs-el / emacs-gtk / etc');
}