TencentOS Server 2: webkitgtk4 (TSSA-2026:0593)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Tencent Linux Security Advisory TSSA-2026:0593.
##

include('compat.inc');

if (description)
{
  script_id(324651);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/02");

  script_cve_id(
    "CVE-2025-43213",
    "CVE-2025-43214",
    "CVE-2025-43457",
    "CVE-2025-43511",
    "CVE-2025-46299",
    "CVE-2026-20608",
    "CVE-2026-20635",
    "CVE-2026-20636",
    "CVE-2026-20643",
    "CVE-2026-20644",
    "CVE-2026-20652",
    "CVE-2026-20664",
    "CVE-2026-20665",
    "CVE-2026-20676",
    "CVE-2026-20691",
    "CVE-2026-28857",
    "CVE-2026-28859",
    "CVE-2026-28871"
  );

  script_name(english:"TencentOS Server 2: webkitgtk4 (TSSA-2026:0593)");

  script_set_attribute(attribute:"synopsis", value:
"The remote TencentOS Server 2 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 2 host is prior to tested version. It is,
therefore, affected by multiple vulnerabilities as referenced in the TSSA-2026:0593 advisory.

    Package updates are available for TencentOS Server 2 that fix the following vulnerabilities:

    CVE-2025-43213:
    The issue was addressed with improved memory handling. This issue is fixed in Safari 18.6, macOS Sequoia
    15.6, iOS 18.6 and iPadOS 18.6, tvOS 18.6, watchOS 11.6, visionOS 2.6. Processing maliciously crafted web
    content may lead to an unexpected Safari crash.

    CVE-2025-43214:
    The issue was addressed with improved memory handling. This issue is fixed in Safari 18.6, watchOS 11.6,
    iOS 18.6 and iPadOS 18.6, tvOS 18.6, macOS Sequoia 15.6, visionOS 2.6. Processing maliciously crafted web
    content may lead to an unexpected Safari crash.

    CVE-2025-43457:
    A use-after-free issue was addressed with improved memory management. This issue is fixed in watchOS 26.1,
    iOS 26.1 and iPadOS 26.1, Safari 26.1, visionOS 26.1. Processing maliciously crafted web content may lead
    to an unexpected Safari crash.

    CVE-2025-43511:
    A use-after-free issue was addressed with improved memory management. This issue is fixed in watchOS 26.2,
    Safari 26.2, iOS 26.2 and iPadOS 26.2, macOS Tahoe 26.2, iOS 18.7.2 and iPadOS 18.7.2, visionOS 26.2.
    Processing maliciously crafted web content may lead to an unexpected process crash.

    CVE-2025-46299:
    A memory initialization issue was addressed with improved memory handling. This issue is fixed in tvOS
    26.2, Safari 26.2, watchOS 26.2, visionOS 26.2, iOS 26.2 and iPadOS 26.2, macOS Tahoe 26.2. Processing
    maliciously crafted web content may disclose internal states of the app.

    CVE-2026-20608:
    This issue was addressed through improved state management. This issue is fixed in macOS Tahoe 26.3, iOS
    18.7.5 and iPadOS 18.7.5, visionOS 26.3, iOS 26.3 and iPadOS 26.3, Safari 26.3. Processing maliciously
    crafted web content may lead to an unexpected process crash.

    CVE-2026-20635:
    The issue was addressed with improved memory handling. This issue is fixed in watchOS 26.3, tvOS 26.3,
    macOS Tahoe 26.3, iOS 18.7.5 and iPadOS 18.7.5, visionOS 26.3, iOS 26.3 and iPadOS 26.3, Safari 26.3.
    Processing maliciously crafted web content may lead to an unexpected process crash.

    CVE-2026-20636:
    The issue was addressed with improved memory handling. This issue is fixed in iOS 26.3 and iPadOS 26.3,
    Safari 26.3, macOS Tahoe 26.3, visionOS 26.3. Processing maliciously crafted web content may lead to an
    unexpected process crash.

    CVE-2026-20643:
    A cross-origin issue in the Navigation API was addressed with improved input validation. This issue is
    fixed in Background Security Improvements for iOS, iPadOS, and macOS, Safari 26.4, iOS 18.7.7 and iPadOS
    18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, visionOS 26.4. Processing maliciously crafted web
    content may bypass Same Origin Policy.

    CVE-2026-20644:
    The issue was addressed with improved memory handling. This issue is fixed in macOS Tahoe 26.3, iOS 18.7.5
    and iPadOS 18.7.5, visionOS 26.3, iOS 26.3 and iPadOS 26.3, Safari 26.3. Processing maliciously crafted
    web content may lead to an unexpected process crash.

    CVE-2026-20652:
    The issue was addressed with improved memory handling. This issue is fixed in macOS Tahoe 26.3, iOS 18.7.5
    and iPadOS 18.7.5, visionOS 26.3, iOS 26.3 and iPadOS 26.3, Safari 26.3. A remote attacker may be able to
    cause a denial-of-service.

    CVE-2026-20664:
    The issue was addressed with improved memory handling. This issue is fixed in Safari 26.4, iOS 26.4 and
    iPadOS 26.4, macOS Tahoe 26.4, visionOS 26.4. Processing maliciously crafted web content may lead to an
    unexpected process crash.

    CVE-2026-20665:
    This issue was addressed through improved state management. This issue is fixed in Safari 26.4, iOS 18.7.7
    and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, tvOS 26.4, visionOS 26.4, watchOS 26.4.
    Processing maliciously crafted web content may prevent Content Security Policy from being enforced.

    CVE-2026-20676:
    This issue was addressed through improved state management. This issue is fixed in iOS 26.3 and iPadOS
    26.3, Safari 26.3, macOS Tahoe 26.3, visionOS 26.3. A website may be able to track users through Safari
    web extensions.

    CVE-2026-20691:
    An authorization issue was addressed with improved state management. This issue is fixed in Safari 26.4,
    iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, visionOS 26.4, watchOS 26.4. A maliciously crafted webpage may
    be able to fingerprint the user.

    CVE-2026-28857:
    The issue was addressed with improved memory handling. This issue is fixed in Safari 26.4, iOS 26.4 and
    iPadOS 26.4, macOS Tahoe 26.4, visionOS 26.4. Processing maliciously crafted web content may lead to an
    unexpected process crash.

    CVE-2026-28859:
    The issue was addressed with improved memory handling. This issue is fixed in Safari 26.4, iOS 26.4 and
    iPadOS 26.4, macOS Tahoe 26.4, tvOS 26.4, visionOS 26.4, watchOS 26.4. A malicious website may be able to
    process restricted web content outside the sandbox.

    CVE-2026-28871:
    A logic issue was addressed with improved checks. This issue is fixed in Safari 26.4, iOS 18.7.7 and
    iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4. Visiting a maliciously crafted website may lead
    to a cross-site scripting attack.

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-20260593.xml");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");
  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:L/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-20676");

  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:"2025/07/29");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/06/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/07/02");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:tencent:tencentos_server:2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:tencent:tencentos_server:webkitgtk4");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  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:"^2([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'TencentOS 2.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': '2',
    'pkgs': [
      {'reference':'webkitgtk4-2.52.4-1.tl2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'webkitgtk4-debuginfo-2.52.4-1.tl2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'webkitgtk4-devel-2.52.4-1.tl2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'webkitgtk4-doc-2.52.4-1.tl2', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'webkitgtk4-jsc-2.52.4-1.tl2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'webkitgtk4-jsc-devel-2.52.4-1.tl2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':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_WARNING,
      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, 'webkitgtk4 / webkitgtk4-debuginfo / webkitgtk4-devel / etc');
}