Vulnerability Note VU#757612

Apache Portable Runtime contains heap buffer overflow in apr_psprintf()

Overview

The Apache HTTP server contains a denial-of-service vulnerability that allows remote attackers to conduct denial-of-service attacks against an affected server.

I. Description

The Apache HTTP server contains a heap buffer overflow vulnerability in the apr_psprintf() function. The Apache Software Foundation has provided the following description of this vulnerability:

Apache 2.0 versions 2.0.37 through 2.0.45 can be caused to crash in certain circumstances. This can be triggered remotely through mod_dav and possibly other mechanisms. The crash was originally reported by David Endler <DEndler@iDefense.com> and was researched and fixed by Joe Orton <jorton@redhat.com>. Specific details and an analysis of the crash will be published Friday, May 30. No more specific information is disclosed at this time, but all Apache 2.0 users are encouraged to upgrade now.

For further information, please read the announcement located at

http://www.apache.org/dist/httpd/Announcement2.html

II. Impact

This vulnerability allows remote attackers to conduct denial-of-service attacks against an affected server.

III. Solution

The Apache Software Foundation recommends that users upgrade to version 2.0.46 to address this vulnerability. The latest version of Apache is available at:

http://httpd.apache.org/download.cgi

Systems Affected

Vendor	Status	Date Notified
Apache Software Foundation	Vulnerable	2-Jun-2003
Apple Computer Inc.	Vulnerable	24-Jun-2003
Conectiva	Vulnerable	23-Jun-2003
Hewlett-Packard Company	Vulnerable	18-Sep-2003
MandrakeSoft	Vulnerable	24-Jun-2003
Red Hat Inc.	Vulnerable	2-Jun-2003

References

http://www.apache.org/dist/httpd/Announcement2.html
http://www.idefense.com/advisory/05.30.03.txt
http://www.secunia.com/advisories/8881/
http://www.webdav.org/mod_dav/
http://www.iss.net/security_center/static/12090.php

Credit

The CERT/CC thanks David Endler for discovering this vulnerability.

This document was written by Jeffrey P. Lanza.

Other Information

Date Public:	2003-05-28
Date First Published:	2003-06-24
Date Last Updated:	2003-09-18
CERT Advisory:
CVE-ID(s):	CAN-2003-0245
NVD-ID(s):	CAN-2003-0245
US-CERT Technical Alerts:
Metric:	18.00
Document Revision:	15

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