Vulnerability Note VU#541310

Apache HTTP Server contains a buffer overflow in the mod_proxy module

Overview

Apache Web Server contains a buffer overflow vulnerability in the mod_proxy module that may allow a remote attacker to execute arbitrary code or launch a denial of service (DoS) attack.

I. Description

The Apache Server is an open-source web server offered by The Apache Software Foundation. The Apache Server uses the mod_proxy module to implement proxying for various common protocols such as FTP and HTTP. In versions of Apache prior to and including 1.3.31-r2, the mod_proxy module contains a buffer overflow vulnerability located in the file proxy_util.c. To exploit this vulnerability an attacker must persuade an Apache server with mod_proxy enabled to connect to a malicious server configured to return an invalid content-length header.

II. Impact

A remote attacker may be able to execute arbitrary code with the privileges of an Apache child process. Exploitation of this vulnerability may completely disable the Apache

server resulting in a denial-of-service condition.

III. Solution

Upgrade Apache

Apache states this issue was fixed in Apache httpd 1.3.32-dev.

Systems Affected

Vendor	Status	Date Notified	Date Updated
Apache	Vulnerable	20-Aug-2004

References

http://www.guninski.com/modproxy1.html
http://secunia.com/advisories/11841/
http://www-1.ibm.com/support/docview.wss?rs=177&context=SSEQTJ&uid=swg21173021

Credit

This vulnerability was reported by Georgi Guninski.

This document was written by Jeff Gennari.

Other Information

Date Public:	2004-06-10
Date First Published:	2004-10-19
Date Last Updated:	2004-10-19
CERT Advisory:
CVE-ID(s):	CAN-2004-0492
NVD-ID(s):	CAN-2004-0492
US-CERT Technical Alerts:
Metric:	4.02
Document Revision:	106

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