Vulnerabilities > CVE-2017-6420 - Use After Free vulnerability in Clamav 0.99.2

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 201804-16.
#
# The advisory text is Copyright (C) 2001-2018 Gentoo Foundation, Inc.
# and licensed under the Creative Commons - Attribution / Share Alike 
# license. See http://creativecommons.org/licenses/by-sa/3.0/
#

include("compat.inc");

if (description)
{
  script_id(109230);
  script_version("1.2");
  script_cvs_date("Date: 2018/06/07 13:15:38");

  script_cve_id("CVE-2012-6706", "CVE-2017-11423", "CVE-2017-6418", "CVE-2017-6419", "CVE-2017-6420", "CVE-2018-0202", "CVE-2018-1000085");
  script_xref(name:"GLSA", value:"201804-16");

  script_name(english:"GLSA-201804-16 : ClamAV: Multiple vulnerabilities");
  script_summary(english:"Checks for updated package(s) in /var/db/pkg");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Gentoo host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"The remote host is affected by the vulnerability described in GLSA-201804-16
(ClamAV: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in ClamAV. Please review
      the CVE identifiers referenced below for details.
  
Impact :

    A remote attacker, through multiple vectors, could execute arbitrary
      code, cause a Denial of Service condition, or have other unspecified
      impacts.
  
Workaround :

    There is no known workaround at this time."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/201804-16"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"All ClamAV users should upgrade to the latest version:
      # emerge --sync
      # emerge --ask --oneshot --verbose '>=app-antivirus/clamav-0.99.4'"
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:clamav");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");

  script_set_attribute(attribute:"patch_publication_date", value:"2018/04/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/04/23");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018 Tenable Network Security, Inc.");
  script_family(english:"Gentoo Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("qpkg.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo");
if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;

if (qpkg_check(package:"app-antivirus/clamav", unaffected:make_list("ge 0.99.4"), vulnerable:make_list("lt 0.99.4"))) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:qpkg_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = qpkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "ClamAV");
}