TencentOS Server 3: httpd:2.4 (TSSA-2026:0732)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Tencent Linux Security Advisory TSSA-2026:0732.
##

include('compat.inc');

if (description)
{
  script_id(329085);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/22");

  script_cve_id(
    "CVE-2024-42516",
    "CVE-2026-29169",
    "CVE-2026-34355",
    "CVE-2026-34356",
    "CVE-2026-42536",
    "CVE-2026-43951",
    "CVE-2026-44185",
    "CVE-2026-44186",
    "CVE-2026-44631"
  );

  script_name(english:"TencentOS Server 3: httpd:2.4 (TSSA-2026:0732)");

  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-2026:0732 advisory.

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

    CVE-2024-42516:
    HTTP response splitting in the core of Apache HTTP Server allows an attacker who can manipulate the
    Content-Type response headers of applications hosted or proxied by the server can split the HTTP response.

    This vulnerability was described as CVE-2023-38709 but the patch included in Apache HTTP Server 2.4.59 did
    not address the issue.

    Users are recommended to upgrade to version 2.4.64, which fixes this issue.

    CVE-2026-29169:
    A NULL pointer dereference in mod_dav_lock in Apache HTTP Server 2.4.66 and earlier may allow an attacker
    to crash the server with a malicious request.mod_dav_lock is not used internally by mod_dav or mod_dav_fs.

    The only known use-case for mod_dav_lock was mod_dav_svn from Apache Subversion earlier than version
    1.2.0.

    Users are recommended to upgrade to version 2.4.66, which fixes this issue, or remove mod_dav_lock.

    CVE-2026-34355:
    A buffer overflow in mod_proxy_html in Apache HTTP Server 2.4.67 and earlier allows an attack by an
    untrusted backend.
    Users are recommended to upgrade to version 2.4.68, which fixes this issue.

    CVE-2026-34356:
    Heap-based Buffer Overflow vulnerability in Apache HTTP Server with malicious backend servers and
    ProxyPassReverseCookie*

    This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.

    Users are recommended to upgrade to version 2.4.68, which fixes the issue.

    CVE-2026-42536:
    Heap-based Buffer Overflow vulnerability in Apache HTTP Server withmod_xml2enc, xml2StartParse, and
    untrusted content

    This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.

    Users are recommended to upgrade to version 2.4.68, which fixes the issue.

    CVE-2026-43951:
    Out-of-bounds Read vulnerability in Apache HTTP Server with mod_headers and mod_mime and multiple response
    languages.

    This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.

    CVE-2026-44185:
    Buffer Over-read vulnerability in Apache HTTP Server via outbound OCSP requests to an attacker controlled
    OCSP server

    This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.

    Users are recommended to upgrade to version 2.4.68, which fixes the issue.

    CVE-2026-44186:
    Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability in the mod_proxy_ftp module in Apache
    HTTP Server with an attacker controlled backend FTP server.

    This issue affects undefined: from 2.4.0 through 2.4.67.

    Users are recommended to upgrade to version 2.4.68, which fixes the issue.

    CVE-2026-44631:
    Buffer Underwrite vulnerability in Apache HTTP Server on crafted regular expressions in the configuration.

    This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.

    Users are recommended to upgrade to version 2.4.68, which fixes the issue.

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-20260732.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:U/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-2026-44631");

  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:"2025/07/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/07/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/07/22");

  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:httpd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:tencent:tencentos_server:mod_http2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:tencent:tencentos_server:mod_md");
  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:"^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':'httpd-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-debuginfo-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-debuginfo-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-debugsource-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-debugsource-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-devel-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-devel-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-filesystem-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-manual-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-tools-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-tools-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-tools-debuginfo-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-tools-debuginfo-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_http2-1.15.7-10.module+el8.10.0+673+2d55fd1f', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_http2-1.15.7-10.module+el8.10.0+673+2d55fd1f', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_http2-debuginfo-1.15.7-10.module+el8.10.0+673+2d55fd1f', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_http2-debuginfo-1.15.7-10.module+el8.10.0+673+2d55fd1f', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_http2-debugsource-1.15.7-10.module+el8.10.0+673+2d55fd1f', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_http2-debugsource-1.15.7-10.module+el8.10.0+673+2d55fd1f', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_ldap-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_ldap-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_ldap-debuginfo-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_ldap-debuginfo-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_md-2.0.8-8.module+el8.10.0+673+2d55fd1f', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'mod_md-2.0.8-8.module+el8.10.0+673+2d55fd1f', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'mod_md-debuginfo-2.0.8-8.module+el8.10.0+673+2d55fd1f', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'mod_md-debuginfo-2.0.8-8.module+el8.10.0+673+2d55fd1f', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'mod_md-debugsource-2.0.8-8.module+el8.10.0+673+2d55fd1f', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'mod_md-debugsource-2.0.8-8.module+el8.10.0+673+2d55fd1f', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'mod_proxy_html-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'mod_proxy_html-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'mod_proxy_html-debuginfo-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'mod_proxy_html-debuginfo-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'mod_session-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_session-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_session-debuginfo-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_session-debuginfo-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_ssl-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'mod_ssl-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'mod_ssl-debuginfo-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'mod_ssl-debuginfo-2.4.37-65.module+el8.10.0+673+2d55fd1f.2', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'}
    ]
  }
];

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, 'httpd / httpd-debuginfo / httpd-debugsource / etc');
}