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Kerberos V5 "libkadm5srv" Buffer Overflow Vulnerability Advisory Available in Danish 

Secunia Advisory: SA13592  
Release Date: 2004-12-21

Critical:
Moderately critical
Impact: System access
Where: From local network
Solution Status: Vendor Patch

Software:Kerberos 5.x

CVE reference:CVE-2004-1189 (Secunia mirror)

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Description:
Michael Tautschnig has reported a vulnerability in Kerberos V5, which potentially can be exploited by malicious users to compromise a vulnerable system.

The vulnerability is caused due to a boundary error in the libkadm5srv administration library within the "add_to_history()" function during the password history handling. This can be exploited to cause a heap-based buffer overflow when a principal changes the password and has a certain password history state.

Successful exploitation may allow execution of arbitrary code on a vulnerable Key Distribution Center (KDC) server. However, this requires that the administrator has performed a certain password policy change.

The vulnerability has been reported in version 1.3.5 and prior.

Solution:
Apply patch for version 1.3.5:
http://web.mit.edu/kerberos/advisories/2004-004-patch_1.3.5.txt
http://web.mit.edu/kerberos/advisories/2004-004-patch_1.3.5.txt.asc

The vulnerability is fixed in version 1.4-beta3. The vulnerability will reportedly be fixed in the upcoming krb5-1.4 release and krb5-1.3.6 patch release.

Provided and/or discovered by:
Michael Tautschnig

Original Advisory:
http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2004-004-pwhist.txt



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.

Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

19 Related Secunia Security Advisories, displaying 10

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5. Kerberos kadmind xprt->xp_auth Code Execution Vulnerability
6. Kerberos kadmind "mechglue" Code Execution Vulnerability
7. Kerberos V5 setuid Security Issue
8. Kerberos V5 Multiple Vulnerabilities
9. Kerberos V5 Telnet Client Information Disclosure Weakness
10. MIT Kerberos Telnet Client Buffer Overflow Vulnerabilities

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