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[SA11170] Apache 2 Connection Denial of Service Vulnerability

From: Secunia Security Advisories (sec-advsecunia.com)
Date: Sat Mar 20 2004 - 01:20:43 CST

TITLE:
Apache 2 Connection Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA11170

VERIFY ADVISORY:
http://secunia.com/advisories/11170/

CRITICAL:
Moderately critical

IMPACT:
DoS

WHERE:
From remote

SOFTWARE:
Apache 2.0.x

DESCRIPTION:
The vendor has reported a vulnerability in Apache 2, which can be
exploited by malicious people to cause a Denial of Service.

The problem is that when using multiple listening sockets, a short
lived connection on a rarely used socket causes the child process to
hold the accept mutex, thereby preventing new connections from being
served until another connection uses the socket.

This has been reported to affect Apache 2.0.48 and prior on some
versions of AIX, Solaris, and Tru64.

Linux, FreeBSD, and Windows are not affected.

SOLUTION:
Update to version 2.0.49:
http://httpd.apache.org/download.cgi

NOTE: Two older issues have also be fixed in version 2.0.49.
SA11092
SA8146

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

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

OTHER REFERENCES:
SA11092:
http://secunia.com/advisories/11092/

SA8146:
http://secunia.com/advisories/8146/

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