Net::DNS: Multiple vulnerabilities

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200708-06 / net-dns
Release Date	August 11, 2007
Latest Revision	August 11, 2007: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
dev-perl/Net-DNS	< 0.60	>= 0.60	All supported architectures

Related bugreports: #184029

Synopsis

Multiple vulnerabilities have been discovered in the Net::DNS Perl module, allowing for a Denial of Service and a cache poisoning attack.

2. Impact Information

Background

Net::DNS is a Perl implementation of a DNS resolver.

Description

hjp discovered an error when handling DNS query IDs which make them partially predictable. Steffen Ullrich discovered an error in the dn_expand() function which could lead to an endless loop.

Impact

A remote attacker could send a specially crafted DNS request to the server which could result in a Denial of Service with an infinite recursion, or perform a cache poisoning attack.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All Net::DNS users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-perl/Net-DNS-0.60"

4. References

Page updated August 11, 2007

Summary: This is a Gentoo Linux Security Advisory

Security Team
Contact Address

Donate to support our development efforts.