TencentOS Server 3: edk2 (TSSA-2024:0190)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Tencent Linux Security Advisory TSSA-2024:0190.
##

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

if (description)
{
  script_id(240041);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/11/20");

  script_cve_id(
    "CVE-2022-36763",
    "CVE-2022-36764",
    "CVE-2022-36765",
    "CVE-2023-45229",
    "CVE-2023-45231",
    "CVE-2023-45232",
    "CVE-2023-45233",
    "CVE-2023-45235"
  );

  script_name(english:"TencentOS Server 3: edk2 (TSSA-2024:0190)");

  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-2024:0190 advisory.

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

    CVE-2022-36763:
    A heap buffer overflow flaw was found via the Tcg2MeasureGptTable() function in EDK2, arising from
    inadequate validation of the GPT Primary Header, presenting a minor risk to confidentiality and integrity.
    The primary consequence is likely a crash or denial of service. This issue may allow a local attacker to
    craft a GPT table, causing an integer overflow and consequent buffer overflow.

    CVE-2022-36764:
    A heap-based buffer overflow flaw was found via the Tcg2MeasurePeImage() function in EDK2. Successful
    exploitation requires a local attacker to trigger an integer overflow in the calculation of the EventSize
    variable at DxeTpm2MeasureBootLib.c, leading to the heap-buffer overflow, presenting a moderate risk to
    confidentiality and integrity. However, the primary consequence is likely a crash or denial of service.

    CVE-2022-36765:
    A flaw was found in the CreateHob() function in EDK2. An attacker, leveraging a local network, can
    initiate an integer overflow leading to a buffer overflow. This issue arises during size alignment within
    the CreateHob() function, requiring activation in the PEI phase. Successful exploitation of this flaw
    poses a moderate threat to confidentiality and integrity, however, the primary consequence is likely a
    crash or denial of service.

    CVE-2023-45229:
    A vulnerability has been identified in the NetworkPkg IP stack of EDK2, the open-source reference
    implementation of the UEFI specification. This flaw enables an unauthenticated attacker within the same
    network vicinity to transmit a specifically crafted DHCPv6 message. Exploiting this vulnerability may
    result in unauthorized access to memory beyond its boundaries, potentially leading to the exposure of
    sensitive information.

    CVE-2023-45231:
    A security loophole involving an out-of-bounds read was identified in EDK2, the open-source reference
    implementation of the UEFI specification. This vulnerability enables an unauthorized attacker within the
    vicinity of the network to transmit a specifically crafted Neighbor Discovery Redirect message.
    Consequently, this may lead to the unauthorized reading of memory beyond the message boundaries,
    potentially resulting in the exposure of sensitive information.

    CVE-2023-45232:
    A security loophole involving an infinite loop was identified in EDK2, the open-source reference
    implementation of the UEFI specification. This weakness enables an unauthorized attacker to exploit system
    availability by sending a specifically crafted Destination Options IPv6 header.

    CVE-2023-45233:
    The Network Package in EDK2 is vulnerable to an infinite loop exploit when parsing a PadN option within
    the Destination Options header of IPv6. This flaw allows an unauthorized attacker to gain access and
    potentially result in a loss of system availability.

    CVE-2023-45235:
    A security flaw involving buffer overflow was identified in EDK2, the open-source reference implementation
    of the UEFI specification. This vulnerability enables an unauthorized attacker within the vicinity network
    to transmit a specifically crafted DHCPv6 proxy Advertise message, resulting in the disclosure of
    information and potential compromise of 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-20240190.xml");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:A/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:A/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-2023-45235");

  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:"2024/05/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/05/22");
  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:edk2");
  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':'edk2-aarch64-20220126gitbb1bba3d77-13.tl3', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'edk2-ovmf-20220126gitbb1bba3d77-13.tl3', '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, 'edk2-aarch64 / edk2-ovmf');
}