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ISC DHCP: Denial of Service

Content:

1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 201401-05 / dhcp
Release Date January 06, 2014
Latest Revision January 06, 2014: 1
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
net-misc/dhcp < 4.2.5_p1 >= 4.2.5_p1 All supported architectures

Related bugreports: #463848

Synopsis

A memory exhaustion vulnerability in ISC DHCP could lead to Denial of Service.

2.  Impact Information

Background

ISC DHCP is a Dynamic Host Configuration Protocol (DHCP) client/server.

Description

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.

3.  Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All ISC DHCP users should upgrade to the latest version:

Code Listing 3.1: Resolution

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=net-misc/dhcp-4.2.5_p1"

4.  References



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Page updated January 06, 2014

Summary: This is a Gentoo Linux Security Advisory

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