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Apache HTTP Server vulnerable to DoS race condition in the handling of short-lived connections

Vulnerability Note VU#132110

Original Release Date: 2004-03-24 | Last Revised: 2004-08-25

Overview

A race condition exists in Apache 2 HTTP Server that may cause a denial-of-service condition on some platforms.

Description

Apache HTTP Server versions 2.0.48 and prior contain a race condition in the handling of short-lived connections. According to the Apache anouncement, when using multiple listening sockets, a short-lived connection on a rarely-used socket may cause the child process to hold the accept mutex, blocking new connections from being served until another connection uses the socket.

This vulnerability does not affect Apache 2.x servers running on FreeBSD or Linux.

Impact

A denial-of-service situation may occur due the race condition until another connection is made the the socket.

Solution

This problem is resolved in Apache HTTP Server 2.0.49.

Vendor Information

132110
 
Affected   Unknown   Unaffected

Apache Software Foundation

Updated:  March 24, 2004

Status

  Vulnerable

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Please see, http://www.apache.org/dist/httpd/Announcement2.html

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Sun Microsystems Inc.

Updated:  August 25, 2004

Status

  Vulnerable

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Please see, http://sunsolve.sun.com/pub-cgi/retrieve.pl?doc=fsalert/57628.

If you have feedback, comments, or additional information about this vulnerability, please send us email.


CVSS Metrics

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A

References

Acknowledgements

Thanks to Apache Software Foundation for reporting this vulnerability.

This document was written by Jason A Rafail.

Other Information

CVE IDs: CVE-2004-0174
Severity Metric: 3.38
Date Public: 2004-03-19
Date First Published: 2004-03-24
Date Last Updated: 2004-08-25 14:40 UTC
Document Revision: 3

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