TencentOS Server 2: cups-filters (TSSA-2024:0529)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Tencent Linux Security Advisory TSSA-2024:0529.
##

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(239746);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/11/20");

  script_cve_id(
    "CVE-2024-47076",
    "CVE-2024-47175",
    "CVE-2024-47176",
    "CVE-2024-47850"
  );

  script_name(english:"TencentOS Server 2: cups-filters (TSSA-2024:0529)");

  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-2024:0529 advisory.

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

    CVE-2024-47076:
    CUPS is a standards-based, open-source printing system, and libcupsfilters contains the code of the
    filters of the former cups-filters package as library functions to be used for the data format conversion
    tasks needed in Printer Applications. The cfGetPrinterAttributes5 function in libcupsfilters does not
    sanitize IPP attributes returned from an IPP server. When these IPP attributes are used, for instance, to
    generate a PPD file, this can lead to attacker controlled data to be provided to the rest of the CUPS
    system.

    CVE-2024-47175:
    CUPS is a standards-based, open-source printing system, and libppd can be used for legacy PPD file
    support. The libppd function ppdCreatePPDFromIPP2 does not sanitize IPP attributes when creating the PPD
    buffer. When used in combination with other functions such as cfGetPrinterAttributes5, can result in user
    controlled input and ultimately code execution via Foomatic. This vulnerability can be part of an exploit
    chain leading to remote code execution (RCE), as described in CVE-2024-47176.

    CVE-2024-47176:
    CUPS is a standards-based, open-source printing system, and cups-browsed contains network printing
    functionality including, but not limited to, auto-discovering print services and shared printers. cups-
    browsed binds to INADDR_ANY:631, causing it to trust any packet from any source, and can cause the Get-
    Printer-Attributes IPP request to an attacker controlled URL.

    Due to the service binding to *:631 ( INADDR_ANY ), multiple bugs in cups-browsed can be exploited in
    sequence to introduce a malicious printer to the system. This chain of exploits ultimately enables an
    attacker to execute arbitrary commands remotely on the target machine without authentication when a print
    job is started. This poses a significant security risk over the network. Notably, this vulnerability is
    particularly concerning as it can be exploited from the public internet, potentially exposing a vast
    number of systems to remote attacks if their CUPS services are enabled.

    CVE-2024-47850:
    CUPS cups-browsed before 2.5b1 will send an HTTP POST request to an arbitrary destination and port in
    response to a single IPP UDP packet requesting a printer to be added, a different vulnerability than
    CVE-2024-47176. (The request is meant to probe the new printer but can be used to create DDoS
    amplification attacks.)

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-20240529.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:F/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:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2024-47175");

  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:"2024/10/02");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/10/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/06/16");

  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:cups-filters");
  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) 2025 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':'cups-filters-1.0.35-29.tl2.3', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'cups-filters-debuginfo-1.0.35-29.tl2.3', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'cups-filters-devel-1.0.35-29.tl2.3', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'cups-filters-libs-1.0.35-29.tl2.3', '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, 'cups-filters / cups-filters-debuginfo / cups-filters-devel / etc');
}