SUSE SLES11 Security Update : clamav (SUSE-SU-2021:14692-1)

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
#
# The package checks in this plugin were extracted from
# SUSE update advisory SUSE-SU-2021:14692-1. The text itself
# is copyright (C) SUSE.
##

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(150524);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/12/26");

  script_cve_id("CVE-2021-1252", "CVE-2021-1404", "CVE-2021-1405");
  script_xref(name:"SuSE", value:"SUSE-SU-2021:14692-1");

  script_name(english:"SUSE SLES11 Security Update : clamav (SUSE-SU-2021:14692-1)");

  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 SLES11 host has a package installed that is affected by multiple vulnerabilities as referenced in
the SUSE-SU-2021:14692-1 advisory.

  - A vulnerability in the Excel XLM macro parsing module in Clam AntiVirus (ClamAV) Software versions 0.103.0
    and 0.103.1 could allow an unauthenticated, remote attacker to cause a denial of service condition on an
    affected device. The vulnerability is due to improper error handling that may result in an infinite loop.
    An attacker could exploit this vulnerability by sending a crafted Excel file to an affected device. An
    exploit could allow the attacker to cause the ClamAV scanning process hang, resulting in a denial of
    service condition. (CVE-2021-1252)

  - A vulnerability in the PDF parsing module in Clam AntiVirus (ClamAV) Software versions 0.103.0 and 0.103.1
    could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected
    device. The vulnerability is due to improper buffer size tracking that may result in a heap buffer over-
    read. An attacker could exploit this vulnerability by sending a crafted PDF file to an affected device. An
    exploit could allow the attacker to cause the ClamAV scanning process to crash, resulting in a denial of
    service condition. (CVE-2021-1404)

  - A vulnerability in the email parsing module in Clam AntiVirus (ClamAV) Software version 0.103.1 and all
    prior versions could allow an unauthenticated, remote attacker to cause a denial of service condition on
    an affected device. The vulnerability is due to improper variable initialization that may result in an
    NULL pointer read. An attacker could exploit this vulnerability by sending a crafted email to an affected
    device. An exploit could allow the attacker to cause the ClamAV scanning process crash, resulting in a
    denial of service condition. (CVE-2021-1405)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1181256");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1184532");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1184533");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1184534");
  # https://lists.suse.com/pipermail/sle-security-updates/2021-April/008635.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?24d593d9");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-1252");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-1404");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-1405");
  script_set_attribute(attribute:"solution", value:
"Update the affected clamav package.");
  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:N/AC:L/PR:N/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-2021-1252");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2021-1405");

  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:"2021/04/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/04/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/06/10");

  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:"cpe:/o:novell:suse_linux:11");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2021-2023 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('audit.inc');
include('global_settings.inc');
include('misc_func.inc');
include('rpm.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/SuSE/release");
if (isnull(release) || release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE");
os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'SUSE');
os_ver = os_ver[1];
if (! preg(pattern:"^(SLES11)$", string:os_ver)) audit(AUDIT_OS_NOT, 'SUSE SLES11', 'SUSE ' + os_ver);

if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

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);

sp = get_kb_item("Host/SuSE/patchlevel");
if (isnull(sp)) sp = "0";
if (os_ver == "SLES11" && (! preg(pattern:"^(4)$", string:sp))) audit(AUDIT_OS_NOT, "SLES11 SP4", os_ver + " SP" + sp);

pkgs = [
    {'reference':'clamav-0.103.2-0.20.35', 'sp':'4', 'release':'SLES11', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'SLES_SAP-release-11.4'},
    {'reference':'clamav-0.103.2-0.20.35', 'sp':'4', 'release':'SLES11', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'sles-release-11.4'}
];

flag = 0;
foreach package_array ( pkgs ) {
  reference = NULL;
  release = NULL;
  sp = NULL;
  cpu = NULL;
  exists_check = NULL;
  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 && exists_check) {
    if (rpm_exists(release:release, rpm:exists_check) && rpm_check(release:release, sp:sp, cpu:cpu, reference:reference, rpm_spec_vers_cmp:rpm_spec_vers_cmp)) flag++;
  }
  else if (reference && release) {
    if (rpm_check(release:release, sp:sp, cpu:cpu, reference:reference, rpm_spec_vers_cmp:rpm_spec_vers_cmp)) flag++;
  }
}

if (flag)
{
  ltss_plugin_caveat = '\n' +
    'NOTE: This vulnerability check contains fixes that apply to\n' +
    'packages only available in SUSE Enterprise Linux Server LTSS\n' +
    'repositories. Access to these package security updates require\n' +
    'a paid SUSE LTSS subscription.\n';
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : rpm_report_get() + ltss_plugin_caveat
  );
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'clamav');
}