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To improve our services to our customers, we have made a number of
additions to the Secunia Advisories and have started translating the
advisories to German.

The improvements will help our customers to get a better
understanding of how we reached our conclusions, how it was rated,
our thoughts on exploitation, attack vectors, and scenarios.

This includes:
* Reason for rating
* Extended description
* Extended solution
* Exploit code or links to exploit code
* Deep links

Read the full description:
http://corporate.secunia.com/products/48/?r=l

Contact Secunia Sales for more information:
http://corporate.secunia.com/how_to_buy/15/?r=l

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

SECUNIA ADVISORY ID:
SA23023

VERIFY ADVISORY:
http://secunia.com/advisories/23023/

CRITICAL:
Moderately critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
mod_auth_kerb 5.x (module for Apache)
http://secunia.com/product/12684/

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:
Restrict access to trusted people only.

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

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

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