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Insecure Library Loading
Moderately critical

mod_auth_kerb "der_get_oid()" Off-By-One Vulnerability

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Release Date:  2006-11-21    Last Update:  2006-11-22    Views:  12,763

Secunia Advisory SA23023

Where:

From remote

Impact:

DoS

Solution Status:

Vendor Workaround

CVE Reference(s):

Description


A vulnerability has been reported in mod_auth_kerb module for Apache, which can be exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an off-by-one error within the "der_get_oid()" function in spnegokrb5/der_get.c. This can be exploited to cause a one-byte heap based buffer overflow by sending specially crafted Kerberos messages.


Solution:
Fixed in CVS.

Provided and/or discovered by:
Reported in a Red Hat bug.

Original Advisory:
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=216482
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=206736

http://modauthkerb.cvs.sourceforge.net/modauthkerb/mod_auth_kerb/spnegokrb5/der_get.c?r1=1.1&r2=1.1.2.1

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: mod_auth_kerb "der_get_oid()" Off-By-One Vulnerability

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