GLSA 200504-28: Heimdal: Buffer overflow vulnerabilities

http://security.gentoo.org/

Severity:	normal
Title:	Heimdal: Buffer overflow vulnerabilities
Date:	04/28/2005
Bugs:	#89861
ID:	200504-28

Synopsis

Buffer overflow vulnerabilities have been found in the telnet client in Heimdal which could lead to execution of arbitrary code.

Background

Heimdal is a free implementation of Kerberos 5 that includes a telnet client program.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
app-crypt/heimdal	< 0.6.4	>= 0.6.4	All supported architectures

Description

Buffer overflow vulnerabilities in the slc_add_reply() and env_opt_add() functions have been discovered by Gael Delalleau in the telnet client in Heimdal.

Impact

Successful exploitation would require a vulnerable user to connect to an attacker-controlled host using the telnet client, potentially executing arbitrary code with the permissions of the user running the application.

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-0.6.4"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200504-28.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.