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Category:   Application (Security)  >   Kerberos Vendors:   MIT
(Gentoo Issues Fix) Kerberos Telnet Encryption Feature Buffer Overflow Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1026732
SecurityTracker URL:  http://securitytracker.com/id/1026732
CVE Reference:   CVE-2011-4862   (Links to External Site)
Date:  Feb 23 2012
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Kerberos. A remote user can execute arbitrary code on the target system.

A remote user can supply a specially crafted encryption key to trigger a buffer overflow and execute arbitrary code on the target system. The code will run with the privileges of the telnet daemon (typically root privileges).

Versions prior to krb5-1.8 and all versions of krb5-appl are affected.

This vulnerability is being actively exploited.

[Editor's note: This vulnerability was previously reported in Alert ID 1026460 as also affecting FreeBSD telnetd.]

Impact:   A remote user can execute arbitrary code on the target system.
Solution:   Gentoo has issued a fix for Heimdal.

The Gentoo advisory is available at:

http://security.gentoo.org/glsa/glsa-201202-05.xml

Vendor URL:  web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-008.txt (Links to External Site)
Cause:   Boundary error
Underlying OS:  Linux (Gentoo)

Message History:   This archive entry is a follow-up to the message listed below.
Dec 27 2011 Kerberos Telnet Encryption Feature Buffer Overflow Lets Remote Users Execute Arbitrary Code



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