TencentOS Server 4: nodejs20 (TSSA-2025:0295)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Tencent Linux Security Advisory TSSA-2025:0295.
##

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

if (description)
{
  script_id(239208);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/12/04");

  script_cve_id("CVE-2024-52811");

  script_name(english:"TencentOS Server 4: nodejs20 (TSSA-2025:0295)");

  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 a vulnerability as referenced in the TSSA-2025:0295 advisory.

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

    CVE-2024-52811:
    The ngtcp2 project is an effort to implement IETF QUIC protocol in C. In affected versions acks are not
    validated before being written to the qlog leading to a buffer overflow. In `ngtcp2_conn::conn_recv_pkt`
    for an ACK, there was new logic that got added to skip `conn_recv_ack` if an ack has already been
    processed in the payload. However, this causes us to also skip `ngtcp2_pkt_validate_ack`. The ack which
    was skipped still got written to qlog. The bug occurs in `ngtcp2_qlog::write_ack_frame`. It is now
    possible to reach this code with an invalid ack, suppose `largest_ack=0` and `first_ack_range=15`.
    Subtracting `largest_ack - first_ack_range` will lead to an integer underflow which is 20 chars long.
    However, the ngtcp2 qlog code assumes the number written is a signed integer and only accounts for 19
    characters of overhead (see `NGTCP2_QLOG_ACK_FRAME_RANGE_OVERHEAD`). Therefore, we overwrite the buffer
    causing a heap overflow. This is high priority and could potentially impact many users if they enable
    qlog. qlog is disabled by default. Due to its overhead, it is most likely used for debugging purpose, but
    the actual use is unknown. ngtcp2 v1.9.1 fixes the bug and users are advised to upgrade. Users unable to
    upgrade should not turn on qlog.

Tenable has extracted the preceding description block directly from the Tencent Linux security advisory.

Note that Nessus has not tested for this issue 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-20250295.xml");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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-2024-52811");

  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:"2025/04/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/04/21");
  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:nodejs20");
  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':'nodejs20-20.19.0-3.oc9', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'nodejs20-20.19.0-3.oc9', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'nodejs20-devel-20.19.0-3.oc9', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'nodejs20-devel-20.19.0-3.oc9', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'nodejs20-docs-20.19.0-3.oc9', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'nodejs20-full-i18n-20.19.0-3.oc9', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'nodejs20-full-i18n-20.19.0-3.oc9', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'nodejs20-libs-20.19.0-3.oc9', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'nodejs20-libs-20.19.0-3.oc9', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'nodejs20-npm-10.7.0-20.19.0.3.oc9', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'nodejs20-npm-10.7.0-20.19.0.3.oc9', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'v8-11.3-devel-11.3.244.8-20.19.0.3.oc9', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'v8-11.3-devel-11.3.244.8-20.19.0.3.oc9', '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, 'nodejs20 / nodejs20-devel / nodejs20-docs / etc');
}