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National Cyber Awareness System

Vulnerability Summary for CVE-2011-4539

Original release date:12/08/2011
Last revised:11/06/2012
Source: US-CERT/NIST

Overview

dhcpd in ISC DHCP 4.x before 4.2.3-P1 and 4.1-ESV before 4.1-ESV-R4 does not properly handle regular expressions in dhcpd.conf, which allows remote attackers to cause a denial of service (daemon crash) via a crafted request packet.

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score:5.0 (MEDIUM) (AV:N/AC:L/Au:N/C:N/I:N/A:P) (legend)
Impact Subscore: 2.9
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type:Allows disruption of serviceUnknown

References to Advisories, Solutions, and Tools

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External Source: CONFIRM
Name: https://www.isc.org/software/dhcp/advisories/cve-2011-4539
Type: Advisory
Hyperlink:https://www.isc.org/software/dhcp/advisories/cve-2011-4539
External Source: XF
Name: isc-dhcp-dhcpd-regex-dos(71680)
Hyperlink:http://xforce.iss.net/xforce/xfdb/71680
External Source: UBUNTU
Name: USN-1309-1
Hyperlink:http://www.ubuntu.com/usn/USN-1309-1
External Source: SECTRACK
Name: 1026393
Hyperlink:http://www.securitytracker.com/id?1026393
External Source: BID
Name: 50971
Hyperlink:http://www.securityfocus.com/bid/50971
External Source: MANDRIVA
Name: MDVSA-2011:182
Hyperlink:http://www.mandriva.com/security/advisories?name=MDVSA-2011:182
External Source: DEBIAN
Name: DSA-2519
Hyperlink:http://www.debian.org/security/2012/dsa-2519
External Source: SECUNIA
Name: 47178
Hyperlink:http://secunia.com/advisories/47178
External Source: SECUNIA
Name: 47153
Hyperlink:http://secunia.com/advisories/47153
External Source: SUSE
Name: openSUSE-SU-2011:1318
Hyperlink:http://lists.opensuse.org/opensuse-updates/2011-12/msg00006.html
External Source: FEDORA
Name: FEDORA-2011-16976
Hyperlink:http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071549.html
External Source: FEDORA
Name: FEDORA-2011-16981
Hyperlink:http://lists.fedoraproject.org/pipermail/package-announce/2011-December/070980.html

Vulnerable software and versions

Nav control imageConfiguration 1
line trunkNav control imageOR
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.2.3
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.2.2
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.2.2:rc1
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.2.2:b1
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.0
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.0.0
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.0.1
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.0.1:b1
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.0.1:rc1
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.0.2
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.0.2:b1
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.0.2:b2
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.0.2:b3
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.0.2:rc1
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.0.3
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.0.3:b1
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.0.3:rc1
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.1.1:b3
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.1.1:rc1
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.1.2
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.2.0
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.2.0:a1
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.2.0:a2
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.2.0:b1
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.2.0:b2
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.2.0:p1
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.2.0:rc1
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.2.1
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.2.1:b1
line trunkspacerNav control image* cpe:/a:isc:dhcp:4.2.1:rc1
Nav control imageConfiguration 2
spacerNav control imageOR
spacerspacerNav control image* cpe:/a:isc:dhcp:4.1-esv:r3
spacerspacerNav control image* cpe:/a:isc:dhcp:4.1-esv:r3_b1
spacerspacerNav control image* cpe:/a:isc:dhcp:4.1-esv:r2
spacerspacerNav control image* cpe:/a:isc:dhcp:4.1-esv:r1
spacerspacerNav control image* cpe:/a:isc:dhcp:4.1-esv
* Denotes Vulnerable Software
* Changes related to vulnerability configurations

Technical Details

Vulnerability Type (View All)
CVE Standard Vulnerability Entry:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4539