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Net::DNS: Multiple vulnerabilities


1.  Gentoo Linux Security Advisory

Version Information

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


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


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


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.


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


There is no known workaround at this time.


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

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