Markus Kliegl mod_bf Buffer Overflow Vulnerability

BID:3713

Info

Markus Kliegl mod_bf Buffer Overflow Vulnerability

Bugtraq ID: 3713
Class: Boundary Condition Error
CVE:
Remote: No
Local: Yes
Published: Dec 18 2001 12:00AM
Updated: Dec 18 2001 12:00AM
Credit: Discovered by GOBBLES <[email protected]> and published in an advisory dated December 17, 2001.
Vulnerable: Markus Kliegl mod_bf 0.2
- FreeBSD FreeBSD 4.4
Not Vulnerable:

Discussion

Markus Kliegl mod_bf Buffer Overflow Vulnerability

mod_bf is an Apache module which allows execution of scripts written in the brainf*ck programming language. Brainf*ck is a language consisting of only eight commands. Noteably, it contains the ability to move through a byte array of memory, and display or modify values in this array.

The mod_bf interpreter does not impose boundary checking on the array allocated for the brainf*ck script. As a result, maliciously constructed scripts may overflow the allocated space, and read or modify arbitrary locations in memory. It may be possible to execute arbitrary code as the Apache process (generally user 'nobody').

Exploit / POC

Markus Kliegl mod_bf Buffer Overflow Vulnerability

Currently the SecurityFocus staff are not aware of any exploits for this issue. If you feel we are in error or are aware of more recent information, please mail us at: [email protected] <mailto:[email protected]>.

Solution / Fix

Markus Kliegl mod_bf Buffer Overflow Vulnerability

Solution:
Currently the SecurityFocus staff are not aware of any vendor-supplied patches for this issue. If you feel we are in error or are aware of more recent information, please mail us at: [email protected] <mailto:[email protected]>.

References

Markus Kliegl mod_bf Buffer Overflow Vulnerability

References:

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