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

047910
CVSS 4.9 - MEDIUM
Attack vector
NETWORK
Attack complexity
HIGH
Privileges required
SINGLE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
COMPLETE
network
high complexity
isc
CWE-119
nessus
NVD
Published: 2013-03-28
Updated: 2013-03-29

Summary

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.

Vulnerable Configurations

Part Description Count
Application
Isc
19

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.

Nessus

  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-201401-05.NASL
    descriptionThe 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.
    last seen2020-06-01
    modified2020-06-02
    plugin id71812
    published2014-01-07
    reporterThis script is Copyright (C) 2014-2018 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/71812
    titleGLSA-201401-05 : ISC DHCP: Denial of Service
    code
    #
# (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 familyMandriva Local Security Checks
    NASL idMANDRIVA_MDVSA-2013-059.NASL
    descriptionA 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
    last seen2020-06-01
    modified2020-06-02
    plugin id66073
    published2013-04-20
    reporterThis script is Copyright (C) 2013-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/66073
    titleMandriva Linux Security Advisory : dhcp (MDVSA-2013:059)
    code
    #%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");

References