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Debian DSA-2519-2 : isc-dhcp - several vulnerabilities

medium Nessus Plugin ID 61382

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Synopsis

The remote Debian host is missing a security-related update.

Description

Several security vulnerabilities affecting ISC dhcpd, a server for automatic IP address assignment, have been discovered. Additionally, the latest security update for isc-dhcp, DSA-2516-1, did not properly apply the patches for CVE-2012-3571 and CVE-2012-3954. This has been addressed in this additional update.

 - CVE-2011-4539 BlueCat Networks discovered that it is possible to crash DHCP servers configured to evaluate requests with regular expressions via crafted DHCP request packets.

 - CVE-2012-3571 Markus Hietava of the Codenomicon CROSS project discovered that it is possible to force the server to enter an infinite loop via messages with malformed client identifiers.

 - CVE-2012-3954 Glen Eustace discovered that DHCP servers running in DHCPv6 mode and possibly DHCPv4 mode suffer of memory leaks while processing messages. An attacker can use this flaw to exhaust resources and perform denial of service attacks.

Solution

Upgrade the isc-dhcp packages.

For the stable distribution (squeeze), this problem has been fixed in version 4.1.1-P1-15+squeeze6.

See Also

https://security-tracker.debian.org/tracker/CVE-2012-3571

https://security-tracker.debian.org/tracker/CVE-2012-3954

https://security-tracker.debian.org/tracker/CVE-2011-4539

https://packages.debian.org/source/squeeze/isc-dhcp

https://www.debian.org/security/2012/dsa-2519

Plugin Details

Severity: Medium

ID: 61382

File Name: debian_DSA-2519.nasl

Version: 1.15

Type: local

Agent: unix

Published: 8/2/2012

Updated: 1/11/2021

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 4.8

Vector: CVSS2#AV:A/AC:L/Au:N/C:N/I:N/A:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:isc-dhcp, cpe:/o:debian:debian_linux:6.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/4/2012

Reference Information

CVE: CVE-2011-4539, CVE-2012-3571, CVE-2012-3954

BID: 50971, 54665

DSA: 2519