ISC DHCP: dhcpclient Remote execution of arbitrary code

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200907-12 / dhcp
Release Date	July 14, 2009
Latest Revision	July 14, 2009: 01
Impact	high
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
net-misc/dhcp	< 3.1.1-r1	>= 3.1.1-r1	All supported architectures

Related bugreports: #277729

Synopsis

A buffer overflow in dhclient as included in the ISC DHCP implementation allows for the remote execution of arbitrary code with root privileges.

2. Impact Information

Background

ISC DHCP is the reference implementation of the Dynamic Host Configuration Protocol as specified in RFC 2131.

Description

The Mandriva Linux Engineering Team has reported a stack-based buffer overflow in the subnet-mask handling of dhclient.

Impact

A remote attacker might set up a rogue DHCP server in a victim's local network, possibly leading to the execution of arbitrary code with root privileges.

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-3.1.1-r1"

4. References

CVE-2009-0692

Page updated July 14, 2009

Summary: This is a Gentoo Linux Security Advisory

Security Team
Contact Address

Donate to support our development efforts.