TencentOS Server 4: firefox (TSSA-2026:0166)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Tencent Linux Security Advisory TSSA-2026:0166.
##

include('compat.inc');

if (description)
{
  script_id(302081);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/03/13");

  script_cve_id(
    "CVE-2026-2447",
    "CVE-2026-2757",
    "CVE-2026-2758",
    "CVE-2026-2759",
    "CVE-2026-2760",
    "CVE-2026-2761",
    "CVE-2026-2762",
    "CVE-2026-2763",
    "CVE-2026-2764",
    "CVE-2026-2765",
    "CVE-2026-2766",
    "CVE-2026-2767",
    "CVE-2026-2768",
    "CVE-2026-2769",
    "CVE-2026-2770",
    "CVE-2026-2771",
    "CVE-2026-2772",
    "CVE-2026-2773",
    "CVE-2026-2774",
    "CVE-2026-2775",
    "CVE-2026-2776",
    "CVE-2026-2777",
    "CVE-2026-2778",
    "CVE-2026-2779",
    "CVE-2026-2780",
    "CVE-2026-2781",
    "CVE-2026-2782",
    "CVE-2026-2783",
    "CVE-2026-2784",
    "CVE-2026-2785",
    "CVE-2026-2786",
    "CVE-2026-2787",
    "CVE-2026-2788",
    "CVE-2026-2789",
    "CVE-2026-2790",
    "CVE-2026-2791",
    "CVE-2026-2792",
    "CVE-2026-2793"
  );
  script_xref(name:"IAVA", value:"2026-A-0169-S");
  script_xref(name:"IAVA", value:"2026-A-0184-S");

  script_name(english:"TencentOS Server 4: firefox (TSSA-2026:0166)");

  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-2026:0166 advisory.

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

    CVE-2026-2793:
    Memory safety bugs present in Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird ESR 140.7, Firefox 147
    and Thunderbird 147. Some of these bugs showed evidence of memory corruption and we presume that with
    enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects
    Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2792:
    Memory safety bugs present in Firefox ESR 140.7, Thunderbird ESR 140.7, Firefox 147 and Thunderbird 147.
    Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of
    these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 148, Firefox
    ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2791:
    Mitigation bypass in the Networking: Cache component. This vulnerability affects Firefox < 148, Firefox
    ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2790:
    Same-origin policy bypass in the Networking: JAR component. This vulnerability affects Firefox < 148,
    Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2789:
    Use-after-free in the Graphics: ImageLib component. This vulnerability affects Firefox < 148, Firefox ESR
    < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2788:
    Incorrect boundary conditions in the Audio/Video: GMP component. This vulnerability affects Firefox < 148,
    Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2787:
    Use-after-free in the DOM: Window and Location component. This vulnerability affects Firefox < 148,
    Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2786:
    Use-after-free in the JavaScript Engine component. This vulnerability affects Firefox < 148, Firefox ESR <
    140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2785:
    Invalid pointer in the JavaScript Engine component. This vulnerability affects Firefox < 148, Firefox ESR
    < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2784:
    Mitigation bypass in the DOM: Security component. This vulnerability affects Firefox < 148, Firefox ESR <
    140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2783:
    Information disclosure due to JIT miscompilation in the JavaScript Engine: JIT component. This
    vulnerability affects Firefox < 148, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2782:
    Privilege escalation in the Netmonitor component. This vulnerability affects Firefox < 148, Firefox ESR <
    140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2781:
    Integer overflow in the Libraries component in NSS. This vulnerability affects Firefox < 148, Firefox ESR
    < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2780:
    Privilege escalation in the Netmonitor component. This vulnerability affects Firefox < 148, Firefox ESR <
    140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2779:
    Incorrect boundary conditions in the Networking: JAR component. This vulnerability affects Firefox < 148,
    Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2778:
    Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component. This vulnerability
    affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird <
    140.8.

    CVE-2026-2777:
    Privilege escalation in the Messaging System component. This vulnerability affects Firefox < 148, Firefox
    ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2776:
    Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This
    vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and
    Thunderbird < 140.8.

    CVE-2026-2775:
    Mitigation bypass in the DOM: HTML Parser component. This vulnerability affects Firefox < 148, Firefox ESR
    < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2774:
    Integer overflow in the Audio/Video component. This vulnerability affects Firefox < 148, Firefox ESR <
    115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2773:
    Incorrect boundary conditions in the Web Audio component. This vulnerability affects Firefox < 148,
    Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2772:
    Use-after-free in the Audio/Video: Playback component. This vulnerability affects Firefox < 148, Firefox
    ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2771:
    Undefined behavior in the DOM: Core & HTML component. This vulnerability affects Firefox < 148, Firefox
    ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2770:
    Use-after-free in the DOM: Bindings (WebIDL) component. This vulnerability affects Firefox < 148, Firefox
    ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2769:
    Use-after-free in the Storage: IndexedDB component. This vulnerability affects Firefox < 148, Firefox ESR
    < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2768:
    Sandbox escape in the Storage: IndexedDB component. This vulnerability affects Firefox < 148, Firefox ESR
    < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2767:
    Use-after-free in the JavaScript: WebAssembly component. This vulnerability affects Firefox < 148, Firefox
    ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2766:
    Use-after-free in the JavaScript Engine: JIT component. This vulnerability affects Firefox < 148, Firefox
    ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2765:
    Use-after-free in the JavaScript Engine component. This vulnerability affects Firefox < 148, Firefox ESR <
    140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2764:
    JIT miscompilation, use-after-free in the JavaScript Engine: JIT component. This vulnerability affects
    Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2763:
    Use-after-free in the JavaScript Engine component. This vulnerability affects Firefox < 148, Firefox ESR <
    115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2762:
    Integer overflow in the JavaScript: Standard Library component. This vulnerability affects Firefox < 148,
    Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2761:
    Sandbox escape in the Graphics: WebRender component. This vulnerability affects Firefox < 148, Firefox ESR
    < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2760:
    Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component. This
    vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and
    Thunderbird < 140.8.

    CVE-2026-2759:
    Incorrect boundary conditions in the Graphics: ImageLib component. This vulnerability affects Firefox <
    148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2758:
    Use-after-free in the JavaScript: GC component. This vulnerability affects Firefox < 148, Firefox ESR <
    115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2757:
    Incorrect boundary conditions in the WebRTC: Audio/Video component. This vulnerability affects Firefox <
    148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

    CVE-2026-2447:
    Heap buffer overflow in libvpx. This vulnerability affects Firefox < 147.0.4, Firefox ESR < 140.7.1,
    Firefox ESR < 115.32.1, Thunderbird < 140.7.2, and Thunderbird < 147.0.2.

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-20260166.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:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/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-2026-2793");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2026-2778");

  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:"2026/02/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/03/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/03/13");

  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-140.8.0-1.tl4.ap.1', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE},
      {'reference':'firefox-140.8.0-1.tl4.ap.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE},
      {'reference':'firefox-debuginfo-140.8.0-1.tl4.ap.1', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE},
      {'reference':'firefox-debuginfo-140.8.0-1.tl4.ap.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE},
      {'reference':'firefox-debugsource-140.8.0-1.tl4.ap.1', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE},
      {'reference':'firefox-debugsource-140.8.0-1.tl4.ap.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE},
      {'reference':'firefox-x11-140.8.0-1.tl4.ap.1', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE},
      {'reference':'firefox-x11-140.8.0-1.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');
}