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Debian dla-4401 : firefox-esr - security update

🗓️ 11 Dec 2025 00:00:00Reported by TenableType 
nessus
 nessus🔗 www.tenable.com👁 11 Views

Debian LTS fixes multiple firefox extended release security issues on Debian 11 with upgrade to 140.6.0esr-1~deb11u1.

Related
Refs
Code
ReporterTitlePublishedViews
Family
GithubExploit		Exploit for Use After Free in Mozilla Firefox
2 Feb 202619:54
–githubexploit
GithubExploit		Exploit for Type Confusion in Mozilla Firefox
9 Apr 202615:45
–githubexploit
FreeBSD		Mozilla -- Use-after-free
9 Dec 202500:00
–freebsd
FreeBSD		Mozilla -- Sandbox escape
9 Dec 202500:00
–freebsd
FreeBSD		Mozilla -- Privilege escalation
9 Dec 202500:00
–freebsd
FreeBSD		Mozilla -- JIT miscompilation
9 Dec 202500:00
–freebsd
FreeBSD		Mozilla -- Privilege escalation
9 Dec 202500:00
–freebsd
FreeBSD		Mozilla -- Privilege escalation
9 Dec 202500:00
–freebsd
FreeBSD		Mozilla -- JIT miscompilation in the JavaScript Engine: JIT component
9 Dec 202500:00
–freebsd
FreeBSD		Mozilla -- Same-origin policy bypass
9 Dec 202500:00
–freebsd
Rows per page
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#
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dla-4401. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

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if (description)
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  script_set_attribute(attribute:"plugin_modification_date", value:"2026/02/25");

  script_cve_id(
    "CVE-2025-14321",
    "CVE-2025-14322",
    "CVE-2025-14323",
    "CVE-2025-14324",
    "CVE-2025-14325",
    "CVE-2025-14328",
    "CVE-2025-14329",
    "CVE-2025-14330",
    "CVE-2025-14331",
    "CVE-2025-14333"
  );

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  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 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dla-4401 advisory.

    - -------------------------------------------------------------------------
    Debian LTS Advisory DLA-4401-1                [email protected]
    https://www.debian.org/lts/security/               Emilio Pozuelo Monfort
    December 11, 2025                             https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : firefox-esr
    Version        : 140.6.0esr-1~deb11u1
    CVE ID         : CVE-2025-14321 CVE-2025-14322 CVE-2025-14323 CVE-2025-14324
                     CVE-2025-14325 CVE-2025-14328 CVE-2025-14329 CVE-2025-14330
                     CVE-2025-14331 CVE-2025-14333

    Multiple security issues have been found in the Mozilla Firefox web
    browser, which could potentially result in the execution of arbitrary
    code, sandbox escape, same-origin policy bypass or privilege escalation.

    For Debian 11 bullseye, these problems have been fixed in version
    140.6.0esr-1~deb11u1.

    We recommend that you upgrade your firefox-esr packages.

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

    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.");
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  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/firefox-esr");
  script_set_attribute(attribute:"solution", value:
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  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
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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]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 11.0', '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': 'firefox-esr', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-ach', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-af', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-all', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-an', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-ar', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-ast', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-az', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-be', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-bg', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-bn', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-br', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-bs', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-ca', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-ca-valencia', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-cak', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-cs', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-cy', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-da', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-de', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-dsb', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-el', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-en-ca', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-en-gb', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-eo', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-es-ar', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-es-cl', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-es-es', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-es-mx', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-et', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-eu', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-fa', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-ff', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-fi', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-fr', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-fur', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-fy-nl', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-ga-ie', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-gd', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-gl', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-gn', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-gu-in', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-he', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-hi-in', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-hr', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-hsb', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-hu', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-hy-am', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-ia', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-id', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-is', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-it', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-ja', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-ka', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-kab', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-kk', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-km', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-kn', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-ko', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-lij', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-lt', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-lv', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-mk', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-mr', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-ms', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-my', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-nb-no', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-ne-np', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-nl', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-nn-no', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-oc', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-pa-in', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-pl', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-pt-br', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-pt-pt', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-rm', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-ro', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-ru', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-sat', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-sc', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-sco', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-si', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-sk', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-skr', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-sl', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-son', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-sq', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-sr', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-sv-se', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-szl', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-ta', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-te', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-tg', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-th', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-tl', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-tr', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-trs', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-uk', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-ur', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-uz', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-vi', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-xh', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-zh-cn', 'reference': '140.6.0esr-1~deb11u1'},
    {'release': '11.0', 'prefix': 'firefox-esr-l10n-zh-tw', 'reference': '140.6.0esr-1~deb11u1'}
];

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, 'firefox-esr / firefox-esr-l10n-ach / firefox-esr-l10n-af / etc');
}

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25 Feb 2026 00:00Current
8.7High risk
Vulners AI Score8.7
CVSS 3.19.8
EPSS0.00517
SSVC
debian longterm advisoryfirefox extended releasesecurity vulnerabilitiesarbitrary code riskupgrade required
11