GLSA 200708-06: Net::DNS: Multiple vulnerabilities

http://security.gentoo.org/

Severity:	normal
Title:	Net::DNS: Multiple vulnerabilities
Date:	08/11/2007
Bugs:	#184029
ID:	200708-06

Synopsis

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

Background

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

Affected packages

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

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.

Workaround

There is no known workaround at this time.

Resolution

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

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

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200708-06.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.