TencentOS Server 4: firefox (TSSA-2026:0982)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Tencent Linux Security Advisory TSSA-2026:0982.
##

include('compat.inc');

if (description)
{
  script_id(344400);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/09");

  script_cve_id(
    "CVE-2026-16365",
    "CVE-2026-74934",
    "CVE-2026-74935",
    "CVE-2026-74936",
    "CVE-2026-74939",
    "CVE-2026-74941",
    "CVE-2026-74942",
    "CVE-2026-74943",
    "CVE-2026-74944",
    "CVE-2026-74945",
    "CVE-2026-74946",
    "CVE-2026-74948",
    "CVE-2026-74949",
    "CVE-2026-74953",
    "CVE-2026-74957",
    "CVE-2026-74959",
    "CVE-2026-74960",
    "CVE-2026-74962",
    "CVE-2026-74963",
    "CVE-2026-74967",
    "CVE-2026-74969",
    "CVE-2026-74971",
    "CVE-2026-74972",
    "CVE-2026-74973",
    "CVE-2026-74974",
    "CVE-2026-74976",
    "CVE-2026-74983",
    "CVE-2026-74987",
    "CVE-2026-74990",
    "CVE-2026-84119",
    "CVE-2026-84120",
    "CVE-2026-84121",
    "CVE-2026-84124",
    "CVE-2026-84131",
    "CVE-2026-84143",
    "CVE-2026-84145"
  );
  script_xref(name:"IAVA", value:"2026-A-0755-S");
  script_xref(name:"IAVA", value:"2026-A-0876-S");
  script_xref(name:"IAVA", value:"2026-A-0924");

  script_name(english:"TencentOS Server 4: firefox (TSSA-2026:0982)");

  script_set_attribute(attribute:"synopsis", value:
"The remote TencentOS Server 4 host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is,
therefore, affected by multiple vulnerabilities as referenced in the TSSA-2026:0982 advisory.

    Package updates are available for TencentOS Server 4 that fix the following vulnerabilities:

    CVE-2026-84145:
    Internally found bugs present in Firefox 154, Firefox ESR 153.1, Firefox ESR 140.14 and Firefox ESR
    115.39. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we
    presume that with enough effort some of these could have been exploited. This vulnerability was fixed in
    Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, and Firefox ESR 153.2.

    CVE-2026-84143:
    Internally found bugs present in Firefox 154, Firefox ESR 153.1 and Firefox ESR 140.14. Some of these bugs
    showed evidence of memory corruption or another security-relevant defect and we presume that with enough
    effort some of these could have been exploited. This vulnerability was fixed in Firefox 155, Firefox ESR
    140.15, and Firefox ESR 153.2.

    CVE-2026-84131:
    Privilege escalation due to invalid pointer in the Graphics component. This vulnerability was fixed in
    Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, and Firefox ESR 153.2.

    CVE-2026-84124:
    Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 155, Firefox ESR
    140.15, and Firefox ESR 153.2.

    CVE-2026-84121:
    Sandbox escape due to use-after-free in the DOM: Security component. This vulnerability was fixed in
    Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, and Firefox ESR 153.2.

    CVE-2026-84120:
    Use-after-free in the Audio/Video component. This vulnerability was fixed in Firefox 155, Firefox ESR
    115.40, Firefox ESR 140.15, and Firefox ESR 153.2.

    CVE-2026-84119:
    Sandbox escape due to use-after-free in the DOM: Navigation component. This vulnerability was fixed in
    Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, and Firefox ESR 153.2.

    CVE-2026-74990:
    Internally found bugs present in Firefox ESR 115.38, Firefox ESR 140.13, Firefox ESR 153.0 and Firefox
    153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we
    presume that with enough effort some of these could have been exploited. This vulnerability was fixed in
    Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, and Firefox ESR 153.1.

    CVE-2026-74987:
    Internally found bugs present in Firefox ESR 140.13, Firefox ESR 153.0 and Firefox 153. Some of these bugs
    showed evidence of memory corruption or another security-relevant defect and we presume that with enough
    effort some of these could have been exploited. This vulnerability was fixed in Firefox 154, Firefox ESR
    140.14, and Firefox ESR 153.1.

    CVE-2026-74983:
    Mitigation bypass in the Data Loss Prevention component. This vulnerability was fixed in Firefox 154,
    Firefox ESR 140.14, and Firefox ESR 153.1.

    CVE-2026-74976:
    JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 154,
    Firefox ESR 140.14, and Firefox ESR 153.1.

    CVE-2026-74974:
    Same-origin policy bypass in the Graphics: ImageLib component. This vulnerability was fixed in Firefox
    154, Firefox ESR 115.39, Firefox ESR 140.14, and Firefox ESR 153.1.

    CVE-2026-74973:
    Race condition, use-after-free in the Graphics component. This vulnerability was fixed in Firefox 154,
    Firefox ESR 115.39, Firefox ESR 140.14, and Firefox ESR 153.1.

    CVE-2026-74972:
    Information disclosure in the DOM: Push Subscriptions component. This vulnerability was fixed in Firefox
    154, Firefox ESR 140.14, and Firefox ESR 153.1.

    CVE-2026-74971:
    Information disclosure in the DOM: UI Events & Focus Handling component. This vulnerability was fixed in
    Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1.

    CVE-2026-74969:
    Use-after-free in the Layout: Text and Fonts component. This vulnerability was fixed in Firefox 154,
    Firefox ESR 115.39, Firefox ESR 140.14, and Firefox ESR 153.1.

    CVE-2026-74967:
    Same-origin policy bypass in the Audio/Video: Playback component. This vulnerability was fixed in Firefox
    154, Firefox ESR 140.14, and Firefox ESR 153.1.

    CVE-2026-74963:
    Same-origin policy bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox
    154, Firefox ESR 140.14, and Firefox ESR 153.1.

    CVE-2026-74962:
    Site isolation issue in the Networking: Cookies component. This vulnerability was fixed in Firefox 154,
    Firefox ESR 140.14, and Firefox ESR 153.1.

    CVE-2026-74960:
    Site isolation issue in the WebExtensions component. This vulnerability was fixed in Firefox 154, Firefox
    ESR 140.14, and Firefox ESR 153.1.

    CVE-2026-74959:
    Mitigation bypass in the Storage: Cache API component. This vulnerability was fixed in Firefox 154,
    Firefox ESR 140.14, and Firefox ESR 153.1.

    CVE-2026-74957:
    Mitigation bypass in the Safe Browsing component. This vulnerability was fixed in Firefox 154, Firefox ESR
    140.14, and Firefox ESR 153.1.

    CVE-2026-74953:
    Privilege escalation in the Networking: Cookies component. This vulnerability was fixed in Firefox 154,
    Firefox ESR 140.14, and Firefox ESR 153.1.

    CVE-2026-74949:
    Privilege escalation due to use-after-free in the Graphics: Canvas2D component. This vulnerability was
    fixed in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1.

    CVE-2026-74948:
    Information disclosure in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR
    115.39, Firefox ESR 140.14, and Firefox ESR 153.1.

    CVE-2026-74946:
    Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This
    vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, and Firefox ESR 153.1.

    CVE-2026-74945:
    Information disclosure in the Graphics: Text component. This vulnerability was fixed in Firefox 154,
    Firefox ESR 115.39, Firefox ESR 140.14, and Firefox ESR 153.1.

    CVE-2026-74944:
    Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 154, Firefox ESR
    140.14, and Firefox ESR 153.1.

    CVE-2026-74943:
    Use-after-free in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 154, Firefox
    ESR 115.39, Firefox ESR 140.14, and Firefox ESR 153.1.

    CVE-2026-74942:
    Privilege escalation in the Remote Settings Client component. This vulnerability was fixed in Firefox 154,
    Firefox ESR 115.39, Firefox ESR 140.14, and Firefox ESR 153.1.

    CVE-2026-74941:
    Privilege escalation in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 154,
    Firefox ESR 140.14, and Firefox ESR 153.1.

    CVE-2026-74939:
    Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 154,
    Firefox ESR 115.39, Firefox ESR 140.14, and Firefox ESR 153.1.

    CVE-2026-74936:
    Use-after-free in the JavaScript WebAssembly component. Fixed in Firefox 154, Firefox ESR 140.14, and
    Firefox ESR 153.1.

    CVE-2026-74935:
    Privilege escalation in the DOM: Networking component. This vulnerability was fixed in Firefox 154,
    Firefox ESR 115.39, Firefox ESR 140.14, and Firefox ESR 153.1.

    CVE-2026-74934:
    Site isolation issue in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 154,
    Firefox ESR 115.39, Firefox ESR 140.14, and Firefox ESR 153.1.

    CVE-2026-16365:
    Privilege escalation in the DOM: Workers component. This vulnerability was fixed in Firefox 153.

Tenable has extracted the preceding description block directly from the Tencent Linux 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://mirrors.tencent.com/tlinux/errata/tssa-20260982.xml");
  script_set_attribute(attribute:"solution", value:
"Update the affected 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:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/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-2026-84143");

  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:"2026/07/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/09");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:tencent:tencentos_server:4");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:tencent:tencentos_server:firefox");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Tencent 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_info2.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/etc/os-release", "Host/TencentOS/rpm-list", "Host/cpu");

  exit(0);
}


include('rpm2.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_product = get_kb_item('installed_os/local/SSH/0/product');
if (isnull(os_product) || 'TencentOS' >!< os_product) audit(AUDIT_OS_NOT, 'TencentOS');
var os_version = get_kb_item('installed_os/local/SSH/0/version');
if (isnull(os_version)) audit(AUDIT_UNKNOWN_APP_VER, 'TencentOS');
if (! preg(pattern:"^4([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'TencentOS 4.x', 'TencentOS ' + os_version);

if (!get_kb_item('Host/TencentOS/rpm-list')) 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, 'TencentOS', cpu);

var constraints = [
  {
    'release': '4',
    'pkgs': [
      {'reference':'firefox-140.15.0-1.tl4.ap.1', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE},
      {'reference':'firefox-140.15.0-1.tl4.ap.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE},
      {'reference':'firefox-debuginfo-140.15.0-1.tl4.ap.1', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE},
      {'reference':'firefox-debuginfo-140.15.0-1.tl4.ap.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE},
      {'reference':'firefox-debugsource-140.15.0-1.tl4.ap.1', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE},
      {'reference':'firefox-debugsource-140.15.0-1.tl4.ap.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE},
      {'reference':'firefox-x11-140.15.0-1.tl4.ap.1', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE},
      {'reference':'firefox-x11-140.15.0-1.tl4.ap.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE}
    ]
  }
];

var os_release = get_one_kb_item('installed_os/local/SSH/0/release');
var os_sp = get_one_kb_item('Host/*/minor_release');

var flag = 0;
var reference;
var sp;
var _cpu;
var el_string;
var rpm_spec_vers_cmp;
var epoch;
var allowmaj;
var exists_check;
var cves;
foreach var constraint ( constraints ) {
  # Check that the target release is equal to the affected release
  if (!empty_or_null(constraint['release'])){
    if (constraint['release'] != os_release) continue;
  }
  if (!empty_or_null(constraint['sp'])){
    if (constraint['sp'] != os_sp) continue;
  }
  foreach var pkg ( constraint['pkgs'] ) {
    reference = NULL;
    sp = NULL;
    _cpu = NULL;
    el_string = NULL;
    rpm_spec_vers_cmp = NULL;
    epoch = NULL;
    allowmaj = NULL;
    exists_check = NULL;
    cves = NULL;
    if (!empty_or_null(pkg['reference'])) reference = pkg['reference'];
    if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
    if (!empty_or_null(pkg['cpu'])) _cpu = pkg['cpu'];
    if (!empty_or_null(pkg['el_string'])) el_string = pkg['el_string'];
    if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
    if (!empty_or_null(pkg['epoch'])) epoch = pkg['epoch'];
    if (!empty_or_null(pkg['allowmaj'])) allowmaj = pkg['allowmaj'];
    if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
    if (!empty_or_null(pkg['cves'])) cves = pkg['cves'];
    if (reference &&
        ## (no known rpm to check OR known rpm_exists)
        (!exists_check || rpm_exists(rpm:exists_check)) &&
        rpm_check(sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj, cves:cves)) flag++;
  }
}

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'firefox / firefox-debuginfo / firefox-debugsource / etc');
}