GLSA 201202-05: Heimdal: Arbitrary code execution

http://security.gentoo.org/

Severity:	high
Title:	Heimdal: Arbitrary code execution
Date:	02/22/2012
Bugs:	#396105
ID:	201202-05

Synopsis

A boundary error in Heimdal could result in execution of arbitrary code.

Background

Heimdal is a free implementation of Kerberos 5.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
app-crypt/heimdal	< 1.5.1-r1	>= 1.5.1-r1	All supported architectures

Description

A boundary error in the "encrypt_keyid()" function in appl/telnet/libtelnet/encrypt.c of the telnet daemon and client could cause a buffer overflow.

Impact

An unauthenticated remote attacker may be able to execute arbitrary code with the privileges of the user running the telnet daemon or client, or cause Denial of Service.

Workaround

There is no known workaround at this time.

Resolution

All Heimdal users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=app-crypt/heimdal-1.5.1-r1"

References

CVE-2011-4862

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201202-05.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.