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Fedora 43 : firefox (2026-6dab7a3eff)

🗓️ 26 Jul 2026 00:00:00Reported by TenableType 
nessus
 nessus
🔗 www.tenable.com👁 2 Views

Fedora 43 Firefox update to 153.0 fixes multiple vulnerabilities per FEDORA-2026-6dab7a3eff.

Related
Refs
Code
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#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##
# The descriptive text and package checks in this plugin were
# extracted from Fedora Security Advisory FEDORA-2026-6dab7a3eff
#

include('compat.inc');

if (description)
{
  script_id(329998);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/26");

  script_cve_id(
    "CVE-2026-16349",
    "CVE-2026-16350",
    "CVE-2026-16351",
    "CVE-2026-16352",
    "CVE-2026-16353",
    "CVE-2026-16354",
    "CVE-2026-16355",
    "CVE-2026-16356",
    "CVE-2026-16357",
    "CVE-2026-16358",
    "CVE-2026-16359",
    "CVE-2026-16360",
    "CVE-2026-16362",
    "CVE-2026-16363",
    "CVE-2026-16364",
    "CVE-2026-16365",
    "CVE-2026-16366",
    "CVE-2026-16367",
    "CVE-2026-16368",
    "CVE-2026-16369",
    "CVE-2026-16370",
    "CVE-2026-16371",
    "CVE-2026-16372",
    "CVE-2026-16373",
    "CVE-2026-16374",
    "CVE-2026-16375",
    "CVE-2026-16376",
    "CVE-2026-16377",
    "CVE-2026-16378",
    "CVE-2026-16379",
    "CVE-2026-16380",
    "CVE-2026-16381",
    "CVE-2026-16382",
    "CVE-2026-16383",
    "CVE-2026-16384",
    "CVE-2026-16385",
    "CVE-2026-16386",
    "CVE-2026-16387",
    "CVE-2026-16388",
    "CVE-2026-16389",
    "CVE-2026-16390",
    "CVE-2026-16391",
    "CVE-2026-16392",
    "CVE-2026-16393",
    "CVE-2026-16394",
    "CVE-2026-16395",
    "CVE-2026-16396",
    "CVE-2026-16397",
    "CVE-2026-16398",
    "CVE-2026-16399",
    "CVE-2026-16400",
    "CVE-2026-16401",
    "CVE-2026-16402",
    "CVE-2026-16403",
    "CVE-2026-16404",
    "CVE-2026-16405",
    "CVE-2026-16406",
    "CVE-2026-16407",
    "CVE-2026-16408",
    "CVE-2026-16409",
    "CVE-2026-16410",
    "CVE-2026-16411",
    "CVE-2026-16412"
  );
  script_xref(name:"IAVA", value:"2026-A-0755");
  script_xref(name:"FEDORA", value:"2026-6dab7a3eff");

  script_name(english:"Fedora 43 : firefox (2026-6dab7a3eff)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Fedora host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the
FEDORA-2026-6dab7a3eff advisory.

    - Update to latest upstream (153.0)

    ----

    - New upstream release (153.0)

    ----

    - Updated to latest upstream (153.0)

Tenable has extracted the preceding description block directly from the Fedora 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://bodhi.fedoraproject.org/updates/FEDORA-2026-6dab7a3eff");
  script_set_attribute(attribute:"solution", value:
"Update the affected firefox package.");
  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:C/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-2026-16412");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2026-16367");

  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:"2026/07/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/07/26");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:43");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora: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:"Fedora 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");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list");

  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) || 'Fedora' >!< os_product) audit(AUDIT_OS_NOT, 'Fedora');
var os_version = get_kb_item('installed_os/local/SSH/0/version');
if (isnull(os_version)) audit(AUDIT_UNKNOWN_APP_VER, 'Fedora');
if (! preg(pattern:"^43([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'Fedora 43', 'Fedora ' + 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) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Fedora', cpu);

var constraints = [
  {
    'release': '43',
    'pkgs': [
      {'reference':'firefox-153.0-3.fc43', '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');
}

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26 Jul 2026 00:00Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.110
EPSS0.00436
SSVC
2