SUSE SLED15 / SLES15 Security Update : clamav (SUSE-SU-2022:1644-1)

##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# SUSE update advisory SUSE-SU-2022:1644-1. The text itself
# is copyright (C) SUSE.
##

include('compat.inc');

if (description)
{
  script_id(161158);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/07/13");

  script_cve_id(
    "CVE-2022-20770",
    "CVE-2022-20771",
    "CVE-2022-20785",
    "CVE-2022-20792",
    "CVE-2022-20796"
  );
  script_xref(name:"SuSE", value:"SUSE-SU-2022:1644-1");

  script_name(english:"SUSE SLED15 / SLES15 Security Update : clamav (SUSE-SU-2022:1644-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote SUSE host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by
multiple vulnerabilities as referenced in the SUSE-SU-2022:1644-1 advisory.

  - On April 20, 2022, the following vulnerability in the ClamAV scanning library versions 0.103.5 and earlier
    and 0.104.2 and earlier was disclosed: A vulnerability in CHM file parser of Clam AntiVirus (ClamAV)
    versions 0.104.0 through 0.104.2 and LTS version 0.103.5 and prior versions could allow an
    unauthenticated, remote attacker to cause a denial of service condition on an affected device. For a
    description of this vulnerability, see the ClamAV blog. This advisory will be updated as additional
    information becomes available. (CVE-2022-20770)

  - On April 20, 2022, the following vulnerability in the ClamAV scanning library versions 0.103.5 and earlier
    and 0.104.2 and earlier was disclosed: A vulnerability in the TIFF file parser of Clam AntiVirus (ClamAV)
    versions 0.104.0 through 0.104.2 and LTS version 0.103.5 and prior versions could allow an
    unauthenticated, remote attacker to cause a denial of service condition on an affected device. For a
    description of this vulnerability, see the ClamAV blog. This advisory will be updated as additional
    information becomes available. (CVE-2022-20771)

  - On April 20, 2022, the following vulnerability in the ClamAV scanning library versions 0.103.5 and earlier
    and 0.104.2 and earlier was disclosed: A vulnerability in HTML file parser of Clam AntiVirus (ClamAV)
    versions 0.104.0 through 0.104.2 and LTS version 0.103.5 and prior versions could allow an
    unauthenticated, remote attacker to cause a denial of service condition on an affected device. For a
    description of this vulnerability, see the ClamAV blog. This advisory will be updated as additional
    information becomes available. (CVE-2022-20785)

  - A vulnerability in the regex module used by the signature database load module of Clam AntiVirus (ClamAV)
    versions 0.104.0 through 0.104.2 and LTS version 0.103.5 and prior versions could allow an authenticated,
    local attacker to crash ClamAV at database load time, and possibly gain code execution. The vulnerability
    is due to improper bounds checking that may result in a multi-byte heap buffer overwflow write. An
    attacker could exploit this vulnerability by placing a crafted CDB ClamAV signature database file in the
    ClamAV database directory. An exploit could allow the attacker to run code as the clamav user.
    (CVE-2022-20792)

  - On May 4, 2022, the following vulnerability in the ClamAV scanning library versions 0.103.5 and earlier
    and 0.104.2 and earlier was disclosed: A vulnerability in Clam AntiVirus (ClamAV) versions 0.103.4,
    0.103.5, 0.104.1, and 0.104.2 could allow an authenticated, local attacker to cause a denial of service
    condition on an affected device. For a description of this vulnerability, see the ClamAV blog.
    (CVE-2022-20796)

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://bugzilla.suse.com/1199242");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1199244");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1199245");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1199246");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1199274");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-20770");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-20771");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-20785");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-20792");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-20796");
  # https://lists.suse.com/pipermail/sle-security-updates/2022-May/010993.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?ce1b61b9");
  script_set_attribute(attribute:"solution", value:
"Update the affected clamav, clamav-devel, libclamav9 and / or libfreshclam2 packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/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: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-2022-20785");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2022-20792");

  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:"2022/05/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/05/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/05/13");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:clamav");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:clamav-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libclamav9");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libfreshclam2");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:15");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2022-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}


include('rpm.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item("Host/SuSE/release");
if (isnull(os_release) || os_release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE");
var os_ver = pregmatch(pattern: "^(SLE(S|D)(?:_SAP)?\d+)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'SUSE');
os_ver = os_ver[1];
if (! preg(pattern:"^(SLED15|SLED_SAP15|SLES15|SLES_SAP15)$", string:os_ver)) audit(AUDIT_OS_NOT, 'SUSE SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15', 'SUSE (' + os_ver + ')');

if (!get_kb_item("Host/SuSE/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, 'SUSE (' + os_ver + ')', cpu);

var service_pack = get_kb_item("Host/SuSE/patchlevel");
if (isnull(service_pack)) service_pack = "0";
if (os_ver == "SLED15" && (! preg(pattern:"^(3|4)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLED15 SP3/4", os_ver + " SP" + service_pack);
if (os_ver == "SLED_SAP15" && (! preg(pattern:"^(3|4)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLED_SAP15 SP3/4", os_ver + " SP" + service_pack);
if (os_ver == "SLES15" && (! preg(pattern:"^(3|4)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLES15 SP3/4", os_ver + " SP" + service_pack);
if (os_ver == "SLES_SAP15" && (! preg(pattern:"^(3|4)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLES_SAP15 SP3/4", os_ver + " SP" + service_pack);

var pkgs = [
    {'reference':'clamav-0.103.6-150000.3.38.1', 'sp':'3', 'release':'SLED_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.3']},
    {'reference':'clamav-0.103.6-150000.3.38.1', 'sp':'3', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.3']},
    {'reference':'clamav-devel-0.103.6-150000.3.38.1', 'sp':'3', 'release':'SLED_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.3']},
    {'reference':'clamav-devel-0.103.6-150000.3.38.1', 'sp':'3', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.3']},
    {'reference':'libclamav9-0.103.6-150000.3.38.1', 'sp':'3', 'release':'SLED_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.3']},
    {'reference':'libclamav9-0.103.6-150000.3.38.1', 'sp':'3', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.3']},
    {'reference':'libfreshclam2-0.103.6-150000.3.38.1', 'sp':'3', 'release':'SLED_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.3']},
    {'reference':'libfreshclam2-0.103.6-150000.3.38.1', 'sp':'3', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.3']},
    {'reference':'clamav-0.103.6-150000.3.38.1', 'sp':'4', 'release':'SLED_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'clamav-0.103.6-150000.3.38.1', 'sp':'4', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'clamav-devel-0.103.6-150000.3.38.1', 'sp':'4', 'release':'SLED_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'clamav-devel-0.103.6-150000.3.38.1', 'sp':'4', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'libclamav9-0.103.6-150000.3.38.1', 'sp':'4', 'release':'SLED_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'libclamav9-0.103.6-150000.3.38.1', 'sp':'4', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'libfreshclam2-0.103.6-150000.3.38.1', 'sp':'4', 'release':'SLED_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'libfreshclam2-0.103.6-150000.3.38.1', 'sp':'4', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
    {'reference':'clamav-0.103.6-150000.3.38.1', 'sp':'3', 'release':'SLED15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.3', 'sle-module-basesystem-release-15.3', 'sled-release-15.3', 'sles-release-15.3']},
    {'reference':'clamav-0.103.6-150000.3.38.1', 'sp':'3', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.3', 'sle-module-basesystem-release-15.3', 'sled-release-15.3', 'sles-release-15.3']},
    {'reference':'clamav-devel-0.103.6-150000.3.38.1', 'sp':'3', 'release':'SLED15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.3', 'sle-module-basesystem-release-15.3', 'sled-release-15.3', 'sles-release-15.3']},
    {'reference':'clamav-devel-0.103.6-150000.3.38.1', 'sp':'3', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.3', 'sle-module-basesystem-release-15.3', 'sled-release-15.3', 'sles-release-15.3']},
    {'reference':'libclamav9-0.103.6-150000.3.38.1', 'sp':'3', 'release':'SLED15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.3', 'sle-module-basesystem-release-15.3', 'sled-release-15.3', 'sles-release-15.3']},
    {'reference':'libclamav9-0.103.6-150000.3.38.1', 'sp':'3', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.3', 'sle-module-basesystem-release-15.3', 'sled-release-15.3', 'sles-release-15.3']},
    {'reference':'libfreshclam2-0.103.6-150000.3.38.1', 'sp':'3', 'release':'SLED15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.3', 'sle-module-basesystem-release-15.3', 'sled-release-15.3', 'sles-release-15.3']},
    {'reference':'libfreshclam2-0.103.6-150000.3.38.1', 'sp':'3', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.3', 'sle-module-basesystem-release-15.3', 'sled-release-15.3', 'sles-release-15.3']},
    {'reference':'clamav-0.103.6-150000.3.38.1', 'sp':'4', 'release':'SLED15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'sle-module-basesystem-release-15.4', 'sled-release-15.4', 'sles-release-15.4']},
    {'reference':'clamav-0.103.6-150000.3.38.1', 'sp':'4', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'sle-module-basesystem-release-15.4', 'sled-release-15.4', 'sles-release-15.4']},
    {'reference':'clamav-devel-0.103.6-150000.3.38.1', 'sp':'4', 'release':'SLED15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'sle-module-basesystem-release-15.4', 'sled-release-15.4', 'sles-release-15.4']},
    {'reference':'clamav-devel-0.103.6-150000.3.38.1', 'sp':'4', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'sle-module-basesystem-release-15.4', 'sled-release-15.4', 'sles-release-15.4']},
    {'reference':'libclamav9-0.103.6-150000.3.38.1', 'sp':'4', 'release':'SLED15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'sle-module-basesystem-release-15.4', 'sled-release-15.4', 'sles-release-15.4']},
    {'reference':'libclamav9-0.103.6-150000.3.38.1', 'sp':'4', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'sle-module-basesystem-release-15.4', 'sled-release-15.4', 'sles-release-15.4']},
    {'reference':'libfreshclam2-0.103.6-150000.3.38.1', 'sp':'4', 'release':'SLED15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'sle-module-basesystem-release-15.4', 'sled-release-15.4', 'sles-release-15.4']},
    {'reference':'libfreshclam2-0.103.6-150000.3.38.1', 'sp':'4', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.4', 'sle-module-basesystem-release-15.4', 'sled-release-15.4', 'sles-release-15.4']}
];

var ltss_caveat_required = FALSE;
var flag = 0;
foreach var package_array ( pkgs ) {
  var reference = NULL;
  var _release = NULL;
  var sp = NULL;
  var _cpu = NULL;
  var exists_check = NULL;
  var rpm_spec_vers_cmp = NULL;
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) _release = package_array['release'];
  if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
  if (!empty_or_null(package_array['cpu'])) _cpu = package_array['cpu'];
  if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
  if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
  if (reference && _release) {
    if (exists_check) {
      var check_flag = 0;
      foreach var check (exists_check) {
        if (!rpm_exists(release:_release, rpm:check)) continue;
        check_flag++;
      }
      if (!check_flag) continue;
    }
    if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, rpm_spec_vers_cmp:rpm_spec_vers_cmp)) 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, 'clamav / clamav-devel / libclamav9 / libfreshclam2');
}