RHEL 9 : thunderbird (RHSA-2026:8286)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2026:8286. The text
# itself is copyright (C) Red Hat, Inc.
##

include('compat.inc');

if (description)
{
  script_id(306513);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/15");

  script_cve_id(
    "CVE-2026-3889",
    "CVE-2026-4371",
    "CVE-2026-4684",
    "CVE-2026-4685",
    "CVE-2026-4686",
    "CVE-2026-4687",
    "CVE-2026-4688",
    "CVE-2026-4689",
    "CVE-2026-4690",
    "CVE-2026-4691",
    "CVE-2026-4692",
    "CVE-2026-4693",
    "CVE-2026-4694",
    "CVE-2026-4695",
    "CVE-2026-4696",
    "CVE-2026-4697",
    "CVE-2026-4698",
    "CVE-2026-4699",
    "CVE-2026-4700",
    "CVE-2026-4701",
    "CVE-2026-4702",
    "CVE-2026-4704",
    "CVE-2026-4705",
    "CVE-2026-4706",
    "CVE-2026-4707",
    "CVE-2026-4708",
    "CVE-2026-4709",
    "CVE-2026-4710",
    "CVE-2026-4711",
    "CVE-2026-4712",
    "CVE-2026-4713",
    "CVE-2026-4714",
    "CVE-2026-4715",
    "CVE-2026-4716",
    "CVE-2026-4717",
    "CVE-2026-4718",
    "CVE-2026-4719",
    "CVE-2026-4720",
    "CVE-2026-4721"
  );
  script_xref(name:"RHSA", value:"2026:8286");

  script_name(english:"RHEL 9 : thunderbird (RHSA-2026:8286)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing one or more security updates for thunderbird.");
  script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 9 host has a package installed that is affected by multiple vulnerabilities as
referenced in the RHSA-2026:8286 advisory.

    Mozilla Thunderbird is a standalone mail and newsgroup client.

    Security Fix(es):

    * firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-4701)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR
    140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4721)

    * firefox: thunderbird: Privilege escalation in the Netmonitor component (CVE-2026-4717)

    * firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component
    (CVE-2026-4688)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4706)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component
    (CVE-2026-4695)

    * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM
    component (CVE-2026-4689)

    * firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-4698)

    * firefox: thunderbird: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine
    component (CVE-2026-4716)

    * firefox: thunderbird: Race condition, use-after-free in the Graphics: WebRender component
    (CVE-2026-4684)

    * firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4705)

    * firefox: thunderbird: Uninitialized memory in the Graphics: Canvas2D component (CVE-2026-4715)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4685)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4714)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-4709)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4710)

    * firefox: thunderbird: Information disclosure in the Widget: Cocoa component (CVE-2026-4712)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component
    (CVE-2026-4697)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4713)

    * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM
    component (CVE-2026-4690)

    * firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-4711)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4686)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4708)

    * firefox: thunderbird: Use-after-free in the CSS Parsing and Computation component (CVE-2026-4691)

    * firefox: thunderbird: Incorrect boundary conditions in the Layout: Text and Fonts component
    (CVE-2026-4699)

    * firefox: thunderbird: Use-after-free in the Layout: Text and Fonts component (CVE-2026-4696)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component
    (CVE-2026-4693)

    * firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4718)

    * firefox: thunderbird: JIT miscompilation in the JavaScript Engine component (CVE-2026-4702)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Text component (CVE-2026-4719)

    * firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component
    (CVE-2026-4694)

    * firefox: thunderbird: Sandbox escape in the Responsive Design Mode component (CVE-2026-4692)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149
    and Thunderbird 149 (CVE-2026-4720)

    * firefox: thunderbird: Mitigation bypass in the Networking: HTTP component (CVE-2026-4700)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4707)

    * firefox: thunderbird: Denial-of-service in the WebRTC: Signaling component (CVE-2026-4704)

    * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Telemetry component
    (CVE-2026-4687)

    * thunderbird: Out of bounds read in IMAP parsing (CVE-2026-4371)

    * thunderbird: Spoofing issue in Thunderbird (CVE-2026-3889)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and
    other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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://access.redhat.com/security/updates/classification/#important");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450710");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450711");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450712");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450713");
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  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450715");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450718");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450719");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450720");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450721");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450722");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450723");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450724");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450725");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450726");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450727");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450728");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450729");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450730");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450732");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450733");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450734");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450735");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450738");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450739");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450740");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450741");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450742");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450744");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450746");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450747");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450748");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450751");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450752");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450755");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450756");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2450757");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2451001");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2451006");
  # https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_8286.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d485a70d");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2026:8286");
  script_set_attribute(attribute:"solution", value:
"Update the RHEL thunderbird package based on the guidance in RHSA-2026:8286.");
  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-2026-4717");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2026-4692");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(20, 120, 125, 130, 131, 190, 266, 359, 364, 444, 475, 501, 653, 733, 770, 787, 805, 823, 824, 825);
  script_set_attribute(attribute:"vendor_severity", value:"Important");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/03/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/04/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/04/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_e4s:9.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:thunderbird");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Red Hat 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_info.nasl", "redhat_repos.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");

  exit(0);
}


include('rpm2.inc');
include('rhel.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) || 'Red Hat' >!< os_product) audit(AUDIT_OS_NOT, 'Red Hat');
var os_version = get_kb_item('installed_os/local/SSH/0/version');
if (isnull(os_version)) audit(AUDIT_UNKNOWN_APP_VER, 'Red Hat');
if (!rhel_check_release(operator: 'eq', os_version: os_version, rhel_version: '9.0')) audit(AUDIT_OS_NOT, 'Red Hat 9.0', 'Red Hat ' + os_version);

if (!get_kb_item('Host/RedHat/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 && 'ppc' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Red Hat', cpu);

var constraints = [
  {
    'release': '9',
    'sp': '0',
    'repo_relative_urls': [
      'content/e4s/rhel9/9.0/aarch64/appstream/debug',
      'content/e4s/rhel9/9.0/aarch64/appstream/os',
      'content/e4s/rhel9/9.0/aarch64/appstream/source/SRPMS',
      'content/e4s/rhel9/9.0/ppc64le/appstream/debug',
      'content/e4s/rhel9/9.0/ppc64le/appstream/os',
      'content/e4s/rhel9/9.0/ppc64le/appstream/source/SRPMS',
      'content/e4s/rhel9/9.0/s390x/appstream/debug',
      'content/e4s/rhel9/9.0/s390x/appstream/os',
      'content/e4s/rhel9/9.0/s390x/appstream/source/SRPMS',
      'content/e4s/rhel9/9.0/x86_64/appstream/debug',
      'content/e4s/rhel9/9.0/x86_64/appstream/os',
      'content/e4s/rhel9/9.0/x86_64/appstream/source/SRPMS'
    ],
    'pkgs': [
      {'reference':'thunderbird-140.9.0-1.el9_0', 'sp':'0', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE}
    ]
  }
];

var applicable_repo_urls = rhel_determine_applicable_repository_urls(constraints:constraints);
if(applicable_repo_urls == RHEL_REPOS_NO_OVERLAP_MESSAGE) exit(0, RHEL_REPO_NOT_ENABLED);

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 repo_relative_urls;
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;
  }

  if (!empty_or_null(constraint['repo_relative_urls'])) repo_relative_urls = constraint['repo_relative_urls'];

  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 &&
        rhel_decide_repo_relative_url_check(required_repo_url_list:repo_relative_urls) &&
        (applicable_repo_urls || (!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)
{
  var subscription_caveat = '\n' +
    'NOTE: This vulnerability check contains fixes that apply to\n' +
    'packages only available in the Red Hat Enterprise Linux\n' +
    'Update Services for SAP Solutions repository.\n' +
    'Access to this repository requires a paid RHEL subscription.\n';
  var extra = NULL;
  if (isnull(applicable_repo_urls) || !applicable_repo_urls) extra = subscription_caveat + rpm_report_get() + redhat_report_repo_caveat();
  else extra = subscription_caveat + rpm_report_get();
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : extra
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'thunderbird');
}