TencentOS Server 2: abrt (TSSA-2026:1063)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Tencent Linux Security Advisory TSSA-2026:1063.
##

include('compat.inc');

if (description)
{
  script_id(349544);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/23");

  script_cve_id("CVE-2026-54228", "CVE-2026-54229");

  script_name(english:"TencentOS Server 2: abrt (TSSA-2026:1063)");

  script_set_attribute(attribute:"synopsis", value:
"The remote TencentOS Server 2 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 2 host is prior to tested version. It is,
therefore, affected by multiple vulnerabilities as referenced in the TSSA-2026:1063 advisory.

    Package updates are available for TencentOS Server 2 that fix the following vulnerabilities:

    CVE-2026-54228:
    A time-of-check time-of-use (TOCTOU) race condition was found in the abrt-dbus D-Bus service's SetElement
    method. Between dump directory creation and post-create event execution, any local user can call
    SetElement to write arbitrary text files into the root-owned dump directory, bypassing package validation
    and allowing crashes of unpackaged binaries to survive post-create processing.

    CVE-2026-54229:
    A race condition was found in the abrt-dbus D-Bus service's ChownProblemDir method. ChownProblemDir opens
    the dump directory with DD_OPEN_READONLY and calls dd_chown to change ownership of all files to the
    caller's uid, succeeding even while post-create event handlers hold a write lock. This allows an attacker
    to gain filesystem-level control of the dump directory while privileged event scripts are still running.

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-20261063.xml");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C");
  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:H/I:H/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-2026-54228");

  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:"2026/06/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/07/31");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/23");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:tencent:tencentos_server:2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:tencent:tencentos_server:abrt");
  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) 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:"^2([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'TencentOS 2.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': '2',
    'pkgs': [
      {'reference':'abrt-2.1.11-61.tl2.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'abrt-addon-ccpp-2.1.11-61.tl2.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'abrt-addon-kerneloops-2.1.11-61.tl2.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'abrt-addon-pstoreoops-2.1.11-61.tl2.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'abrt-addon-python-2.1.11-61.tl2.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'abrt-addon-upload-watch-2.1.11-61.tl2.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'abrt-addon-vmcore-2.1.11-61.tl2.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'abrt-addon-xorg-2.1.11-61.tl2.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'abrt-cli-2.1.11-61.tl2.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'abrt-console-notification-2.1.11-61.tl2.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'abrt-dbus-2.1.11-61.tl2.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'abrt-debuginfo-2.1.11-61.tl2.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'abrt-desktop-2.1.11-61.tl2.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'abrt-devel-2.1.11-61.tl2.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'abrt-gui-2.1.11-61.tl2.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'abrt-gui-devel-2.1.11-61.tl2.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'abrt-gui-libs-2.1.11-61.tl2.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'abrt-libs-2.1.11-61.tl2.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'abrt-python-2.1.11-61.tl2.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'abrt-python-doc-2.1.11-61.tl2.1', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'abrt-retrace-client-2.1.11-61.tl2.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'abrt-tui-2.1.11-61.tl2.1', '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, 'abrt / abrt-addon-ccpp / abrt-addon-kerneloops / etc');
}