Nessus Plugin #12293

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Note: This file has been created from a downloaded version of the Nessus Plugins from http://www.nessus.org/. Therefore, the information here can be outdated.

Apache Input Header Folding and mod_ssl ssl_io_filter_cleanup DoS Vulnerabilities

Family:

Denial of Service

Category:

infos

Copyright:

This script is Copyright (C) 2004 David Maciejak

Summary:

Checks for version of Apache

Version:

$Revision: 1.6 $

Cve_id:

CAN-2004-0493

Bugtraq_id:

10619, 12877

Xrefs:

OSVDB:7269

Description:

The remote host appears to be running a version of Apache 2.x which is
older than 2.0.50.

There is denial of service in apache httpd 2.0.x by sending a
specially crafted HTTP request. It is possible to consume arbitrary
amount of memory. On 64 bit systems with more than 4GB virtual memory
this may lead to heap based buffer overflow. See also
http://www.guninski.com/httpd1.html

There is also a denial of service vulnerability in mod_ssl's
ssl_io_filter_cleanup function. By sending a request to vulnerable
server over SSL and closing the connection before the server can send
a response, an attacker can cause a memory violation that crashes the
server.

Solution : Upgrade to Apache/2.0.50 or newer
Risk factor : Medium