TencentOS Server 3: firefox (TSSA-2026:0912)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Tencent Linux Security Advisory TSSA-2026:0912.
##

include('compat.inc');

if (description)
{
  script_id(341101);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/08/27");

  script_cve_id(
    "CVE-2026-74934",
    "CVE-2026-74935",
    "CVE-2026-74936",
    "CVE-2026-74939",
    "CVE-2026-74940",
    "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-2026-74964",
    "CVE-2026-74965",
    "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"
  );
  script_xref(name:"IAVA", value:"2026-A-0876");

  script_name(english:"TencentOS Server 3: firefox (TSSA-2026:0912)");

  script_set_attribute(attribute:"synopsis", value:
"The remote TencentOS Server 3 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 3 host is prior to tested version. It is,
therefore, affected by multiple vulnerabilities as referenced in the TSSA-2026:0912 advisory.

    Package updates are available for TencentOS Server 3 that fix the following vulnerabilities:

    CVE-2026-74934:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the
    following issue:
    Site isolation issue in the Graphics: CanvasWebGL component

    CVE-2026-74935:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the
    following issue:
    Privilege escalation in the DOM: Networking component

    CVE-2026-74936:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the
    following issue:
    Use-after-free in the JavaScript: WebAssembly component

    CVE-2026-74939:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the
    following issue:
    Privilege escalation in the DOM: Navigation component

    CVE-2026-74940:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the
    following issue:
    Use-after-free in the Graphics: Text component

    CVE-2026-74941:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the
    following issue:
    Privilege escalation in the Graphics: CanvasWebGL component

    CVE-2026-74942:
    A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue:
    Privilege escalation in the Remote Settings Client component

    CVE-2026-74943:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the
    following issue:
    Use-after-free in the Graphics: ImageLib component

    CVE-2026-74944:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the
    following issue:
    Use-after-free in the DOM: Core & HTML component

    CVE-2026-74945:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the
    following issue:
    Information disclosure in the Graphics: Text component

    CVE-2026-74946:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the
    following issue:
    Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component

    CVE-2026-74948:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the
    following issue:
    Information disclosure in the Graphics component

    CVE-2026-74949:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the
    following issue:
    Privilege escalation due to use-after-free in the Graphics: Canvas2D component

    CVE-2026-74953:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the
    following issue:
    Privilege escalation in the Networking: Cookies component

    CVE-2026-74957:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the
    following issue:
    Mitigation bypass in the Safe Browsing component

    CVE-2026-74959:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the
    following issue:
    Mitigation bypass in the Storage: Cache API component

    CVE-2026-74960:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the
    following issue:
    Site isolation issue in the WebExtensions component

    CVE-2026-74962:
    A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue:
    Site isolation issue in the Networking: Cookies component

    CVE-2026-74963:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the
    following issue:
    Same-origin policy bypass in the Networking: Cookies component

    CVE-2026-74964:
    A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue:
    Integer overflow in the Graphics component

    CVE-2026-74965:
    A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue:
    Privilege escalation in the Shell Integration component

    CVE-2026-74967:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the
    following issue:
    Same-origin policy bypass in the Audio/Video: Playback component

    CVE-2026-74969:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the
    following issue:
    Use-after-free in the Layout: Text and Fonts component

    CVE-2026-74971:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the
    following issue:
    Information disclosure in the DOM: UI Events & Focus Handling component

    CVE-2026-74972:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the
    following issue:
    Information disclosure in the DOM: Push Subscriptions component

    CVE-2026-74973:
    A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue:
    Race condition, use-after-free in the Graphics component

    CVE-2026-74974:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the
    following issue:
    Same-origin policy bypass in the Graphics: ImageLib component

    CVE-2026-74976:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the
    following issue:
    JIT miscompilation in the JavaScript Engine: JIT component

    CVE-2026-74983:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the
    following issue:
    Mitigation bypass in the Data Loss Prevention component

    CVE-2026-74987:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the
    following issue:
    Internally found bugs present in Thunderbird ESR 140.13, Thunderbird ESR 153.0 and Thunderbird 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.

    CVE-2026-74990:
    A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the
    following issue:
    Internally found bugs present in Thunderbird ESR 140.13, Thunderbird ESR 153.0 and Thunderbird 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.

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-20260912.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-2026-74944");

  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:"2026/08/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/08/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/08/27");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:tencent:tencentos_server:3");
  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:"^3([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'TencentOS 3.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': '3',
    'pkgs': [
      {'reference':'firefox-140.14.0-1.tl3.ap.1', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE},
      {'reference':'firefox-140.14.0-1.tl3.ap.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE},
      {'reference':'firefox-debuginfo-140.14.0-1.tl3.ap.1', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE},
      {'reference':'firefox-debuginfo-140.14.0-1.tl3.ap.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE},
      {'reference':'firefox-debugsource-140.14.0-1.tl3.ap.1', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE},
      {'reference':'firefox-debugsource-140.14.0-1.tl3.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');
}