TencentOS Server 3: vim (TSSA-2026:0260)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Tencent Linux Security Advisory TSSA-2026:0260.
##

include('compat.inc');

if (description)
{
  script_id(310951);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/29");

  script_cve_id("CVE-2026-28417", "CVE-2026-28421", "CVE-2026-33412");
  script_xref(name:"IAVA", value:"2026-A-0195-S");
  script_xref(name:"IAVA", value:"2026-A-0278-S");

  script_name(english:"TencentOS Server 3: vim (TSSA-2026:0260)");

  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-2026:0260 advisory.

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

    CVE-2026-28417:
    Vim is an open source, command line text editor. Prior to version 9.2.0073, an OS command injection
    vulnerability exists in the netrw standard plugin bundled with Vim. By inducing a user to open a crafted
    URL (e.g., using the scp:// protocol handler), an attacker can execute arbitrary shell commands with the
    privileges of the Vim process. Version 9.2.0073 fixes the issue.

    CVE-2026-28421:
    Vim is an open source, command line text editor. Versions prior to 9.2.0077 have a heap-buffer-overflow
    and a segmentation fault (SEGV) exist in Vim's swap file recovery logic. Both are caused by unvalidated
    fields read from crafted pointer blocks within a swap file. Version 9.2.0077 fixes the issue.

    CVE-2026-33412:
    Vim is an open source, command line text editor. Prior to version 9.2.0202, a command injection
    vulnerability exists in Vim's glob() function on Unix-like systems. By including a newline character (\n)
    in a pattern passed to glob(), an attacker may be able to execute arbitrary shell commands. This
    vulnerability depends on the user's 'shell' setting. This issue has been patched in version 9.2.0202.

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-20260260.xml");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/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:N/UI:R/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-2026-28421");

  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:"2026/02/27");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/04/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/04/29");

  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:vim");
  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':'vim-common-8.0.1763-22.tl3.1', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'vim-common-8.0.1763-22.tl3.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'vim-common-debuginfo-8.0.1763-22.tl3.1', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'vim-common-debuginfo-8.0.1763-22.tl3.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'vim-debuginfo-8.0.1763-22.tl3.1', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'vim-debuginfo-8.0.1763-22.tl3.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'vim-debugsource-8.0.1763-22.tl3.1', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'vim-debugsource-8.0.1763-22.tl3.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'vim-enhanced-8.0.1763-22.tl3.1', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'vim-enhanced-8.0.1763-22.tl3.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'vim-enhanced-debuginfo-8.0.1763-22.tl3.1', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'vim-enhanced-debuginfo-8.0.1763-22.tl3.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'vim-filesystem-8.0.1763-22.tl3.1', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'vim-minimal-8.0.1763-22.tl3.1', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'vim-minimal-8.0.1763-22.tl3.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'vim-minimal-debuginfo-8.0.1763-22.tl3.1', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'vim-minimal-debuginfo-8.0.1763-22.tl3.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'vim-X11-8.0.1763-22.tl3.1', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'vim-X11-8.0.1763-22.tl3.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'vim-X11-debuginfo-8.0.1763-22.tl3.1', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'vim-X11-debuginfo-8.0.1763-22.tl3.1', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'}
    ]
  }
];

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, 'vim-X11 / vim-X11-debuginfo / vim-common / etc');
}