GLSA 200605-10: pdnsd: Denial of Service and potential arbitrary code execution

http://security.gentoo.org/

Severity:	high
Title:	pdnsd: Denial of Service and potential arbitrary code execution
Date:	05/10/2006
Bugs:	#131341
ID:	200605-10

Synopsis

pdnsd is vulnerable to a buffer overflow that may result in arbitrary code execution.

Background

pdnsd is a proxy DNS server with permanent caching that is designed to cope with unreachable DNS servers.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-dns/pdnsd	< 1.2.4	>= 1.2.4	All supported architectures

Description

The pdnsd team has discovered an unspecified buffer overflow vulnerability. The PROTOS DNS Test Suite, by the Oulu University Secure Programming Group (OUSPG), has also revealed a memory leak error within the handling of the QTYPE and QCLASS DNS queries, leading to consumption of large amounts of memory.

Impact

An attacker can craft malicious DNS queries leading to a Denial of Service, and potentially the execution of arbitrary code.

Workaround

There is no known workaround at this time.

Resolution

All pdnsd users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-dns/pdnsd-1.2.4-r1"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200605-10.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.