TencentOS Server 3: mysql:8.0 (TSSA-2026:0245)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Tencent Linux Security Advisory TSSA-2026:0245.
##

include('compat.inc');

if (description)
{
  script_id(310053);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/24");

  script_cve_id(
    "CVE-2026-21936",
    "CVE-2026-21937",
    "CVE-2026-21941",
    "CVE-2026-21948",
    "CVE-2026-21964",
    "CVE-2026-21968"
  );
  script_xref(name:"IAVA", value:"2026-A-0073");

  script_name(english:"TencentOS Server 3: mysql:8.0 (TSSA-2026:0245)");

  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-2026:0245 advisory.

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

    CVE-2026-21936:
    Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB).  Supported versions that
    are affected are 8.0.0-8.0.44, 8.4.0-8.4.7 and  9.0.0-9.5.0. Easily exploitable vulnerability allows high
    privileged attacker with network access via multiple protocols to compromise MySQL Server.  Successful
    attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable
    crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 4.9 (Availability impacts).  CVSS Vector:
    (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

    CVE-2026-21937:
    Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: DDL).  Supported versions
    that are affected are 8.0.0-8.0.44, 8.4.0-8.4.7 and  9.0.0-9.5.0. Easily exploitable vulnerability allows
    high privileged attacker with network access via multiple protocols to compromise MySQL Server.
    Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently
    repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 4.9 (Availability impacts).  CVSS
    Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

    CVE-2026-21941:
    Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer).  Supported
    versions that are affected are 8.0.0-8.0.44, 8.4.0-8.4.7 and  9.0.0-9.5.0. Easily exploitable
    vulnerability allows high privileged attacker with network access via multiple protocols to compromise
    MySQL Server.  Successful attacks of this vulnerability can result in unauthorized ability to cause a hang
    or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 4.9 (Availability
    impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

    CVE-2026-21948:
    Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer).  Supported
    versions that are affected are 8.0.0-8.0.44, 8.4.0-8.4.7 and  9.0.0-9.5.0. Easily exploitable
    vulnerability allows high privileged attacker with network access via multiple protocols to compromise
    MySQL Server.  Successful attacks of this vulnerability can result in unauthorized ability to cause a hang
    or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 4.9 (Availability
    impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

    CVE-2026-21964:
    Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Thread Pooling).  Supported
    versions that are affected are 8.0.0-8.0.44, 8.4.0-8.4.7 and  9.0.0-9.5.0. Easily exploitable
    vulnerability allows high privileged attacker with network access via multiple protocols to compromise
    MySQL Server.  Successful attacks of this vulnerability can result in unauthorized ability to cause a hang
    or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 4.9 (Availability
    impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

    CVE-2026-21968:
    Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer).  Supported
    versions that are affected are 8.0.0-8.0.44, 8.4.0-8.4.7 and  9.0.0-9.5.0. Easily exploitable
    vulnerability allows low privileged attacker with network access via multiple protocols to compromise
    MySQL Server.  Successful attacks of this vulnerability can result in unauthorized ability to cause a hang
    or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 6.5 (Availability
    impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).

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-20260245.xml");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/I:N/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:H/UI:N/S:U/C:N/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-2026-21968");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2026-21948");

  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:"2026/01/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/03/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/04/24");

  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:mecab");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:tencent:tencentos_server:mecab-ipadic");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:tencent:tencentos_server:mysql");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Tencent Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2026 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':'mecab-0.996-2.module+el8.10.0+781+68a1cbe0', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mecab-0.996-2.module+el8.10.0+781+68a1cbe0', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mecab-debuginfo-0.996-2.module+el8.10.0+781+68a1cbe0', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mecab-debuginfo-0.996-2.module+el8.10.0+781+68a1cbe0', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mecab-debugsource-0.996-2.module+el8.10.0+781+68a1cbe0', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mecab-debugsource-0.996-2.module+el8.10.0+781+68a1cbe0', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mecab-devel-0.996-2.module+el8.10.0+781+68a1cbe0', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mecab-devel-0.996-2.module+el8.10.0+781+68a1cbe0', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mecab-ipadic-2.7.0.20070801-17.module+el8.10.0+727+ecc1cc8b', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mecab-ipadic-2.7.0.20070801-17.module+el8.10.0+727+ecc1cc8b', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mecab-ipadic-EUCJP-2.7.0.20070801-17.module+el8.10.0+727+ecc1cc8b', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mecab-ipadic-EUCJP-2.7.0.20070801-17.module+el8.10.0+727+ecc1cc8b', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mysql-8.0.45-1.module+el8.10.0+864+833fc4b0', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mysql-8.0.45-1.module+el8.10.0+864+833fc4b0', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mysql-common-8.0.45-1.module+el8.10.0+864+833fc4b0', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mysql-common-8.0.45-1.module+el8.10.0+864+833fc4b0', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mysql-debuginfo-8.0.45-1.module+el8.10.0+864+833fc4b0', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mysql-debuginfo-8.0.45-1.module+el8.10.0+864+833fc4b0', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mysql-debugsource-8.0.45-1.module+el8.10.0+864+833fc4b0', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mysql-debugsource-8.0.45-1.module+el8.10.0+864+833fc4b0', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mysql-devel-8.0.45-1.module+el8.10.0+864+833fc4b0', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mysql-devel-8.0.45-1.module+el8.10.0+864+833fc4b0', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mysql-devel-debuginfo-8.0.45-1.module+el8.10.0+864+833fc4b0', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mysql-devel-debuginfo-8.0.45-1.module+el8.10.0+864+833fc4b0', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mysql-errmsg-8.0.45-1.module+el8.10.0+864+833fc4b0', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mysql-errmsg-8.0.45-1.module+el8.10.0+864+833fc4b0', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mysql-libs-8.0.45-1.module+el8.10.0+864+833fc4b0', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mysql-libs-8.0.45-1.module+el8.10.0+864+833fc4b0', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mysql-libs-debuginfo-8.0.45-1.module+el8.10.0+864+833fc4b0', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mysql-libs-debuginfo-8.0.45-1.module+el8.10.0+864+833fc4b0', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mysql-server-8.0.45-1.module+el8.10.0+864+833fc4b0', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mysql-server-8.0.45-1.module+el8.10.0+864+833fc4b0', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mysql-server-debuginfo-8.0.45-1.module+el8.10.0+864+833fc4b0', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mysql-server-debuginfo-8.0.45-1.module+el8.10.0+864+833fc4b0', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mysql-test-8.0.45-1.module+el8.10.0+864+833fc4b0', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mysql-test-8.0.45-1.module+el8.10.0+864+833fc4b0', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mysql-test-debuginfo-8.0.45-1.module+el8.10.0+864+833fc4b0', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mysql-test-debuginfo-8.0.45-1.module+el8.10.0+864+833fc4b0', '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_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, 'mecab / mecab-debuginfo / mecab-debugsource / etc');
}