Heimdal: Arbitrary code execution

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 201202-05 / heimdal
Release Date	February 22, 2012
Latest Revision	February 22, 2012: 1
Impact	high
Exploitable	remote

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

Related bugreports: #396105

Synopsis

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

2. Impact Information

Background

Heimdal is a free implementation of Kerberos 5.

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.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All Heimdal users should upgrade to the latest version:

Code Listing 3.1: Resolution

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

4. References

CVE-2011-4862

Page updated February 22, 2012

Summary: This is a Gentoo Linux Security Advisory

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