Vulnerabilities > CVE-2013-2494 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in ISC Dhcp

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 201401-05.
#
# The advisory text is Copyright (C) 2001-2015 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(71812);
  script_version("1.5");
  script_cvs_date("Date: 2018/08/10 18:07:07");

  script_cve_id("CVE-2013-2494");
  script_xref(name:"GLSA", value:"201401-05");

  script_name(english:"GLSA-201401-05 : ISC DHCP: Denial of Service");
  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-201401-05
(ISC DHCP: Denial of Service)

    ISC DHCP is vulnerable to a memory exhaustion attack involving regular
      expressions sent by DHCP clients.
  
Impact :

    A remote attacker could send a specially crafted request from a
      malicious or spoofed client, potentially leading to a Denial of Service
      condition.
  
Workaround :

    There is no known workaround at this time."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/201401-05"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"All ISC DHCP users should upgrade to the latest version:
      # emerge --sync
      # emerge --ask --oneshot --verbose '>=net-misc/dhcp-4.2.5_p1'"
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:S/C:N/I:N/A:C");

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

  script_set_attribute(attribute:"patch_publication_date", value:"2014/01/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2014/01/07");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2014-2018 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:"net-misc/dhcp", unaffected:make_list("ge 4.2.5_p1"), vulnerable:make_list("lt 4.2.5_p1"))) flag++;

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

#%NASL_MIN_LEVEL 80502

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Mandriva Linux Security Advisory MDVSA-2013:059. 
# The text itself is copyright (C) Mandriva S.A.
#

include("compat.inc");

if (description)
{
  script_id(66073);
  script_version("1.5");
  script_cvs_date("Date: 2019/08/02 13:32:55");

  script_cve_id("CVE-2013-2494");
  script_bugtraq_id(58772);
  script_xref(name:"MDVSA", value:"2013:059");

  script_name(english:"Mandriva Linux Security Advisory : dhcp (MDVSA-2013:059)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Mandriva Linux host is missing one or more security
updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"A security issue was identified and fixed in ISC DHCP :

libdns in ISC DHCP 4.2.x before 4.2.5-P1 allows remote name servers to
cause a denial of service (memory consumption) via vectors involving a
regular expression, as demonstrated by a memory-exhaustion attack
against a machine running a dhcpd process, a related issue to
CVE-2013-2266 (CVE-2013-2494).

The updated packages have upgraded to the 4.2.5-P1 version which is
not vulnerable to this issue"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:S/C:N/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:dhcp-client");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:dhcp-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:dhcp-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:dhcp-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:dhcp-relay");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:dhcp-server");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mandriva:business_server:1");

  script_set_attribute(attribute:"patch_publication_date", value:"2013/04/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/04/20");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2013-2019 Tenable Network Security, Inc.");
  script_family(english:"Mandriva Local Security Checks");

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

  exit(0);
}


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


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Mandrake/release")) audit(AUDIT_OS_NOT, "Mandriva / Mandake Linux");
if (!get_kb_item("Host/Mandrake/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^(amd64|i[3-6]86|x86_64)$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Mandriva / Mandrake Linux", cpu);


flag = 0;
if (rpm_check(release:"MDK-MBS1", cpu:"x86_64", reference:"dhcp-client-4.2.5P1-1.mbs1")) flag++;
if (rpm_check(release:"MDK-MBS1", cpu:"x86_64", reference:"dhcp-common-4.2.5P1-1.mbs1")) flag++;
if (rpm_check(release:"MDK-MBS1", cpu:"x86_64", reference:"dhcp-devel-4.2.5P1-1.mbs1")) flag++;
if (rpm_check(release:"MDK-MBS1", cpu:"x86_64", reference:"dhcp-doc-4.2.5P1-1.mbs1")) flag++;
if (rpm_check(release:"MDK-MBS1", cpu:"x86_64", reference:"dhcp-relay-4.2.5P1-1.mbs1")) flag++;
if (rpm_check(release:"MDK-MBS1", cpu:"x86_64", reference:"dhcp-server-4.2.5P1-1.mbs1")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");