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nessusThis script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.REDHAT-RHSA-2024-3261.NASL
HistoryMay 23, 2024 - 12:00 a.m.

RHEL 8 : tigervnc (RHSA-2024:3261)

2024-05-2300:00:00
This script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
4
rhel 8
tigervnc
security vulnerabilities
heap buffer overread
data leakage
use-after-free
cve-2024-31080
cve-2024-31081
cve-2024-31083
red hat enterprise linux
tenable

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

7.7 High

AI Score

Confidence

High

0.0005 Low

EPSS

Percentile

17.1%

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:3261 advisory.

Virtual Network Computing (VNC) is a remote display system which allows users to view a computing desktop     environment not only on the machine where it is running, but from anywhere on the Internet and from a wide     variety of machine architectures. TigerVNC is a suite of VNC servers and clients.

Security Fix(es):

* xorg-x11-server: Heap buffer overread/data leakage in ProcXIGetSelectedEvents (CVE-2024-31080)

* xorg-x11-server: Heap buffer overread/data leakage in ProcXIPassiveGrabDevice (CVE-2024-31081)

* xorg-x11-server: Use-after-free in ProcRenderAddGlyphs (CVE-2024-31083)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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.

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2024:3261. The text
# itself is copyright (C) Red Hat, Inc.
##

include('compat.inc');

if (description)
{
  script_id(197777);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/05/23");

  script_cve_id("CVE-2024-31080", "CVE-2024-31081", "CVE-2024-31083");
  script_xref(name:"RHSA", value:"2024:3261");

  script_name(english:"RHEL 8 : tigervnc (RHSA-2024:3261)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing one or more security updates for tigervnc.");
  script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as
referenced in the RHSA-2024:3261 advisory.

    Virtual Network Computing (VNC) is a remote display system which allows users to view a computing desktop
    environment not only on the machine where it is running, but from anywhere on the Internet and from a wide
    variety of machine architectures. TigerVNC is a suite of VNC servers and clients.

    Security Fix(es):

    * xorg-x11-server: Heap buffer overread/data leakage in ProcXIGetSelectedEvents (CVE-2024-31080)

    * xorg-x11-server: Heap buffer overread/data leakage in ProcXIPassiveGrabDevice (CVE-2024-31081)

    * xorg-x11-server: Use-after-free in ProcRenderAddGlyphs (CVE-2024-31083)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and
    other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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://access.redhat.com/security/updates/classification/#important");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2271997");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2271998");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2272000");
  # https://access.redhat.com/security/data/csaf/v2/advisories/2024/rhsa-2024_3261.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e432a362");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2024:3261");
  script_set_attribute(attribute:"solution", value:
"Update the RHEL tigervnc package based on the guidance in RHSA-2024:3261.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:P/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: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-2024-31081");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2024-31083");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(126, 416);
  script_set_attribute(attribute:"vendor_severity", value:"Important");

  script_set_attribute(attribute:"vuln_publication_date", value:"2024/04/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/05/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/05/23");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:8");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:tigervnc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:tigervnc-icons");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:tigervnc-license");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:tigervnc-selinux");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:tigervnc-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:tigervnc-server-minimal");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:tigervnc-server-module");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl", "redhat_repos.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");

  exit(0);
}


include('rpm.inc');
include('rhel.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/RedHat/release');
if (isnull(os_release) || 'Red Hat' >!< os_release) audit(AUDIT_OS_NOT, 'Red Hat');
var os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Red Hat');
os_ver = os_ver[1];
if (!rhel_check_release(operator: 'ge', os_version: os_ver, rhel_version: '8')) audit(AUDIT_OS_NOT, 'Red Hat 8.x', 'Red Hat ' + os_ver);

if (!get_kb_item('Host/RedHat/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 && 'ppc' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Red Hat', cpu);

var constraints = [
  {
    'repo_relative_urls': [
      'content/dist/rhel8/8.10/aarch64/appstream/debug',
      'content/dist/rhel8/8.10/aarch64/appstream/os',
      'content/dist/rhel8/8.10/aarch64/appstream/source/SRPMS',
      'content/dist/rhel8/8.10/ppc64le/appstream/debug',
      'content/dist/rhel8/8.10/ppc64le/appstream/os',
      'content/dist/rhel8/8.10/ppc64le/appstream/source/SRPMS',
      'content/dist/rhel8/8.10/s390x/appstream/debug',
      'content/dist/rhel8/8.10/s390x/appstream/os',
      'content/dist/rhel8/8.10/s390x/appstream/source/SRPMS',
      'content/dist/rhel8/8.10/x86_64/appstream/debug',
      'content/dist/rhel8/8.10/x86_64/appstream/os',
      'content/dist/rhel8/8.10/x86_64/appstream/source/SRPMS',
      'content/dist/rhel8/8.6/aarch64/appstream/debug',
      'content/dist/rhel8/8.6/aarch64/appstream/os',
      'content/dist/rhel8/8.6/aarch64/appstream/source/SRPMS',
      'content/dist/rhel8/8.6/ppc64le/appstream/debug',
      'content/dist/rhel8/8.6/ppc64le/appstream/os',
      'content/dist/rhel8/8.6/ppc64le/appstream/source/SRPMS',
      'content/dist/rhel8/8.6/s390x/appstream/debug',
      'content/dist/rhel8/8.6/s390x/appstream/os',
      'content/dist/rhel8/8.6/s390x/appstream/source/SRPMS',
      'content/dist/rhel8/8.6/x86_64/appstream/debug',
      'content/dist/rhel8/8.6/x86_64/appstream/os',
      'content/dist/rhel8/8.6/x86_64/appstream/source/SRPMS',
      'content/dist/rhel8/8.8/aarch64/appstream/debug',
      'content/dist/rhel8/8.8/aarch64/appstream/os',
      'content/dist/rhel8/8.8/aarch64/appstream/source/SRPMS',
      'content/dist/rhel8/8.8/ppc64le/appstream/debug',
      'content/dist/rhel8/8.8/ppc64le/appstream/os',
      'content/dist/rhel8/8.8/ppc64le/appstream/source/SRPMS',
      'content/dist/rhel8/8.8/s390x/appstream/debug',
      'content/dist/rhel8/8.8/s390x/appstream/os',
      'content/dist/rhel8/8.8/s390x/appstream/source/SRPMS',
      'content/dist/rhel8/8.8/x86_64/appstream/debug',
      'content/dist/rhel8/8.8/x86_64/appstream/os',
      'content/dist/rhel8/8.8/x86_64/appstream/source/SRPMS',
      'content/dist/rhel8/8.9/aarch64/appstream/debug',
      'content/dist/rhel8/8.9/aarch64/appstream/os',
      'content/dist/rhel8/8.9/aarch64/appstream/source/SRPMS',
      'content/dist/rhel8/8.9/ppc64le/appstream/debug',
      'content/dist/rhel8/8.9/ppc64le/appstream/os',
      'content/dist/rhel8/8.9/ppc64le/appstream/source/SRPMS',
      'content/dist/rhel8/8.9/s390x/appstream/debug',
      'content/dist/rhel8/8.9/s390x/appstream/os',
      'content/dist/rhel8/8.9/s390x/appstream/source/SRPMS',
      'content/dist/rhel8/8.9/x86_64/appstream/debug',
      'content/dist/rhel8/8.9/x86_64/appstream/os',
      'content/dist/rhel8/8.9/x86_64/appstream/source/SRPMS',
      'content/dist/rhel8/8/aarch64/appstream/debug',
      'content/dist/rhel8/8/aarch64/appstream/os',
      'content/dist/rhel8/8/aarch64/appstream/source/SRPMS',
      'content/dist/rhel8/8/ppc64le/appstream/debug',
      'content/dist/rhel8/8/ppc64le/appstream/os',
      'content/dist/rhel8/8/ppc64le/appstream/source/SRPMS',
      'content/dist/rhel8/8/s390x/appstream/debug',
      'content/dist/rhel8/8/s390x/appstream/os',
      'content/dist/rhel8/8/s390x/appstream/source/SRPMS',
      'content/dist/rhel8/8/x86_64/appstream/debug',
      'content/dist/rhel8/8/x86_64/appstream/os',
      'content/dist/rhel8/8/x86_64/appstream/source/SRPMS'
    ],
    'pkgs': [
      {'reference':'tigervnc-1.13.1-10.el8_10', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'tigervnc-icons-1.13.1-10.el8_10', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'tigervnc-license-1.13.1-10.el8_10', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'tigervnc-selinux-1.13.1-10.el8_10', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'tigervnc-server-1.13.1-10.el8_10', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'tigervnc-server-minimal-1.13.1-10.el8_10', 'release':'8', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'tigervnc-server-module-1.13.1-10.el8_10', 'release':'8', 'rpm_spec_vers_cmp':TRUE}
    ]
  }
];

var applicable_repo_urls = rhel_determine_applicable_repository_urls(constraints:constraints);
if(applicable_repo_urls == RHEL_REPOS_NO_OVERLAP_MESSAGE) exit(0, RHEL_REPO_NOT_ENABLED);

var flag = 0;
foreach var constraint_array ( constraints ) {
  var repo_relative_urls = NULL;
  if (!empty_or_null(constraint_array['repo_relative_urls'])) repo_relative_urls = constraint_array['repo_relative_urls'];
  foreach var pkg ( constraint_array['pkgs'] ) {
    var reference = NULL;
    var _release = NULL;
    var sp = NULL;
    var _cpu = NULL;
    var el_string = NULL;
    var rpm_spec_vers_cmp = NULL;
    var epoch = NULL;
    var allowmaj = NULL;
    var exists_check = NULL;
    var cves = NULL;
    if (!empty_or_null(pkg['reference'])) reference = pkg['reference'];
    if (!empty_or_null(pkg['release'])) _release = 'RHEL' + pkg['release'];
    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 &&
        _release &&
        rhel_decide_repo_relative_url_check(required_repo_url_list:repo_relative_urls) &&
        (applicable_repo_urls || (!exists_check || rpm_exists(release:_release, rpm:exists_check))) &&
        rpm_check(release:_release, 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)
{
  var extra = NULL;
  if (isnull(applicable_repo_urls) || !applicable_repo_urls) extra = rpm_report_get() + redhat_report_repo_caveat();
  else extra = rpm_report_get();
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : extra
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'tigervnc / tigervnc-icons / tigervnc-license / tigervnc-selinux / etc');
}
VendorProductVersionCPE
redhatenterprise_linuxtigervncp-cpe:/a:redhat:enterprise_linux:tigervnc
redhatenterprise_linuxtigervnc-server-modulep-cpe:/a:redhat:enterprise_linux:tigervnc-server-module
redhatenterprise_linuxtigervnc-licensep-cpe:/a:redhat:enterprise_linux:tigervnc-license
redhatenterprise_linuxtigervnc-server-minimalp-cpe:/a:redhat:enterprise_linux:tigervnc-server-minimal
redhatenterprise_linuxtigervnc-serverp-cpe:/a:redhat:enterprise_linux:tigervnc-server
redhatenterprise_linuxtigervnc-selinuxp-cpe:/a:redhat:enterprise_linux:tigervnc-selinux
redhatenterprise_linuxtigervnc-iconsp-cpe:/a:redhat:enterprise_linux:tigervnc-icons
redhatenterprise_linux8cpe:/o:redhat:enterprise_linux:8

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

7.7 High

AI Score

Confidence

High

0.0005 Low

EPSS

Percentile

17.1%