TencentOS Server 4: httpd (TSSA-2026:0759)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Tencent Linux Security Advisory TSSA-2026:0759.
##

include('compat.inc');

if (description)
{
  script_id(330793);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/29");

  script_cve_id(
    "CVE-2026-23918",
    "CVE-2026-29167",
    "CVE-2026-29170",
    "CVE-2026-34355",
    "CVE-2026-34356",
    "CVE-2026-42535",
    "CVE-2026-42536",
    "CVE-2026-43951",
    "CVE-2026-44119",
    "CVE-2026-44185",
    "CVE-2026-44186",
    "CVE-2026-48913"
  );

  script_name(english:"TencentOS Server 4: httpd (TSSA-2026:0759)");

  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-2026:0759 advisory.

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

    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-2026-44119:
    Improper Privilege Management vulnerability in Apache HTTP Server 2.4.67 and earlier allows local
    .htaccess authors to read files with the privileges of the httpd user.

    This issue affects Apache HTTP Server: from through 2.4.67.

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

    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-2026-43951:
    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-2026-44186:
    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-2026-29167:
    Use After Free vulnerability in Apache HTTP Server with mod_ldap in per-directory 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.

    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-2026-29170:
    A cross-site scripting vulnerability exists in mod_proxy_ftp's HTML directory list generation in Apache
    HTTP Server 2.4.67 and earlier when listing FTP directory contents either via forward or reverse proxy
    configuration.

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

    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-2026-48913:
    Use After Free vulnerability in Apache HTTP Server module mod_http2 when file handles are already
    exhausted.

    This issue affects Apache HTTP Server: from 2.4.55 through 2.4.67.

    CVE-2026-42535:
    A path handling issue in mod_dav_fs in Apache 2.4.67 and earlierallows a WebDAV content author to
    directly manipulate trusted DAV property databases, potentially causing child process crashes.

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

    CVE-2026-23918:
    Double Free and possible RCE vulnerability in Apache HTTP Server with the HTTP/2 protocol.

    This issue affects Apache HTTP Server: 2.4.66.

    Users are recommended to upgrade to version 2.4.67, 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-20260759.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:POC/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:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-29167");

  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:"2026/05/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/07/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/07/29");

  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:httpd");
  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:"^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':'httpd-2.4.66-2.tl4', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-2.4.66-2.tl4', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-core-2.4.66-2.tl4', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-core-2.4.66-2.tl4', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-core-debuginfo-2.4.66-2.tl4', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-core-debuginfo-2.4.66-2.tl4', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-debuginfo-2.4.66-2.tl4', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-debuginfo-2.4.66-2.tl4', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-debugsource-2.4.66-2.tl4', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-debugsource-2.4.66-2.tl4', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-devel-2.4.66-2.tl4', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-devel-2.4.66-2.tl4', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-filesystem-2.4.66-2.tl4', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-tools-2.4.66-2.tl4', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-tools-2.4.66-2.tl4', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-tools-debuginfo-2.4.66-2.tl4', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-tools-debuginfo-2.4.66-2.tl4', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_ldap-2.4.66-2.tl4', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_ldap-2.4.66-2.tl4', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_ldap-debuginfo-2.4.66-2.tl4', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_ldap-debuginfo-2.4.66-2.tl4', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_lua-2.4.66-2.tl4', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_lua-2.4.66-2.tl4', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_lua-debuginfo-2.4.66-2.tl4', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_lua-debuginfo-2.4.66-2.tl4', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_proxy_html-2.4.66-2.tl4', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_proxy_html-2.4.66-2.tl4', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_proxy_html-debuginfo-2.4.66-2.tl4', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_proxy_html-debuginfo-2.4.66-2.tl4', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_session-2.4.66-2.tl4', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_session-2.4.66-2.tl4', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_session-debuginfo-2.4.66-2.tl4', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_session-debuginfo-2.4.66-2.tl4', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_ssl-2.4.66-2.tl4', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_ssl-2.4.66-2.tl4', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_ssl-debuginfo-2.4.66-2.tl4', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_ssl-debuginfo-2.4.66-2.tl4', '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_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-core / httpd-core-debuginfo / etc');
}