GLSA 201111-06: MaraDNS: Arbitrary code execution

http://security.gentoo.org/

Severity:	high
Title:	MaraDNS: Arbitrary code execution
Date:	11/20/2011
Bugs:	#352569
ID:	201111-06

Synopsis

A buffer overflow vulnerability in MaraDNS allows remote attackers to execute arbitrary code or cause a Denial of Service.

Background

MaraDNS is a proxy DNS server with permanent caching.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-dns/maradns	< 1.4.06	>= 1.4.06	All supported architectures

Description

A long DNS hostname with a large number of labels could trigger a buffer overflow in the compress_add_dlabel_points() function of dns/Compress.c.

Impact

A remote unauthenticated attacker could execute arbitrary code or cause a Denial of Service.

Workaround

There is no known workaround at this time.

Resolution

All MaraDNS users should upgrade to the latest stable version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=net-dns/maradns-1.4.06"

NOTE: This is a legacy GLSA. Updates for all affected architectures are available since February 12, 2011. It is likely that your system is already no longer affected by this issue.

References

CVE-2011-0520

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201111-06.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.