TencentOS Server 4: linux-firmware (TSSA-2024:0439)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Tencent Linux Security Advisory TSSA-2024:0439.
##

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

if (description)
{
  script_id(238948);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/11/20");

  script_cve_id(
    "CVE-2023-20584",
    "CVE-2023-31315",
    "CVE-2023-31346",
    "CVE-2023-31355",
    "CVE-2023-31356",
    "CVE-2024-21978"
  );

  script_name(english:"TencentOS Server 4: linux-firmware (TSSA-2024:0439)");

  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-2024:0439 advisory.

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

    CVE-2023-31356:
    Incomplete system memory cleanup in SEV firmware could
    allow a privileged attacker to corrupt guest private memory, potentially
    resulting in a loss of data integrity.

    CVE-2023-31346:
    IOMMU improperly handles certain special address
    ranges with invalid device table entries (DTEs), which may allow an attacker
    with privileges and a compromised Hypervisor to
    induce DTE faults to bypass RMP checks in SEV-SNP, potentially leading to a
    loss of guest integrity.

    CVE-2023-31315:
    Improper validation in a model specific register (MSR) could allow a malicious program with ring0 access
    to modify SMM configuration while SMI lock is enabled, potentially leading to arbitrary code execution.

    CVE-2023-20584:
    IOMMU improperly handles certain special address
    ranges with invalid device table entries (DTEs), which may allow an attacker
    with privileges and a compromised Hypervisor to
    induce DTE faults to bypass RMP checks in SEV-SNP, potentially leading to a
    loss of guest integrity.

    CVE-2024-21978:
    Improper input validation in SEV-SNP could allow a malicious hypervisor to read or overwrite guest memory
    potentially leading to data leakage or data corruption.

    CVE-2023-31355:
    Improper restriction of write operations in SNP firmware could allow a malicious hypervisor to overwrite a
    guest's UMC seed potentially allowing reading of memory from a decommissioned guest.

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-20240439.xml");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:M/C:C/I:C/A:N");
  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:H/UI:N/S:C/C:H/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2024-21978");

  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:"2025/01/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/01/13");
  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:4");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:tencent:tencentos_server:linux-firmware");
  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:"^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':'amd-gpu-firmware-20240909-1.tl4', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'amd-ucode-firmware-20240909-1.tl4', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'atheros-firmware-20240909-1.tl4', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'brcmfmac-firmware-20240909-1.tl4', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'cirrus-audio-firmware-20240909-1.tl4', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'dvb-firmware-20240909-1.tl4', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'intel-audio-firmware-20240909-1.tl4', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'intel-gpu-firmware-20240909-1.tl4', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'intel-vsc-firmware-20240909-1.tl4', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'iwlegacy-firmware-20240909-1.tl4', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'iwlwifi-dvm-firmware-20240909-1.tl4', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'iwlwifi-mvm-firmware-20240909-1.tl4', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'libertas-firmware-20240909-1.tl4', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'linux-firmware-20240909-1.tl4', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'linux-firmware-whence-20240909-1.tl4', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'liquidio-firmware-20240909-1.tl4', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mlxsw_spectrum-firmware-20240909-1.tl4', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mrvlprestera-firmware-20240909-1.tl4', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mt7xxx-firmware-20240909-1.tl4', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'netronome-firmware-20240909-1.tl4', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'nvidia-gpu-firmware-20240909-1.tl4', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'nxpwireless-firmware-20240909-1.tl4', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'qcom-firmware-20240909-1.tl4', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'qed-firmware-20240909-1.tl4', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'realtek-firmware-20240909-1.tl4', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'tiwilink-firmware-20240909-1.tl4', '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_WARNING,
      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, 'amd-gpu-firmware / amd-ucode-firmware / atheros-firmware / etc');
}