TencentOS Server 3: libtpms (TSSA-2022:0274)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Tencent Linux Security Advisory TSSA-2022:0274.
##

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

if (description)
{
  script_id(239862);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/12/05");

  script_cve_id("CVE-2021-3623", "CVE-2021-3746");

  script_name(english:"TencentOS Server 3: libtpms (TSSA-2022:0274)");

  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-2022:0274 advisory.

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

      CVE-2021-3746:
      A flaw was found in the libtpms code that may cause access beyond the boundary of internal buffers. The
    vulnerability is triggered by specially-crafted TPM2 command packets that then trigger the issue when the
    state of the TPM2's volatile state is written. The highest threat from this vulnerability is to system
    availability. This issue affects libtpms versions before 0.8.5, before 0.7.9 and before 0.6.6.

      CVE-2021-3623:
      A flaw was found in libtpms. The flaw can be triggered by specially-crafted TPM 2 command packets
    containing illegal values and may lead to an out-of-bounds access when the volatile state of the TPM 2 is
    marshalled/written or unmarshalled/read. The highest threat from this vulnerability is to system
    availability.

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-20220274.xml");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/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-2021-3623");

  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:"2022/12/23");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/12/23");
  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:3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:tencent:tencentos_server:libtpms");
  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:"^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':'libtpms-0.9.1-1.20211126git1ff6fe1f43.module+el8.6.0+402+96cec09c', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'libtpms-0.9.1-1.20211126git1ff6fe1f43.module+el8.6.0+402+96cec09c', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'libtpms-debuginfo-0.9.1-1.20211126git1ff6fe1f43.module+el8.6.0+402+96cec09c', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'libtpms-debuginfo-0.9.1-1.20211126git1ff6fe1f43.module+el8.6.0+402+96cec09c', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'libtpms-debugsource-0.9.1-1.20211126git1ff6fe1f43.module+el8.6.0+402+96cec09c', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'libtpms-debugsource-0.9.1-1.20211126git1ff6fe1f43.module+el8.6.0+402+96cec09c', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'libtpms-devel-0.9.1-1.20211126git1ff6fe1f43.module+el8.6.0+402+96cec09c', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'libtpms-devel-0.9.1-1.20211126git1ff6fe1f43.module+el8.6.0+402+96cec09c', '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_NOTE,
      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, 'libtpms / libtpms-debuginfo / libtpms-debugsource / etc');
}