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Gentoo Linux Security Advisory                           GLSA 200407-03
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                                            https://security.gentoo.org/
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  Severity: Normal
     Title: Apache 2: Remote denial of service attack
      Date: July 04, 2004
      Bugs: #55441
        ID: 200407-03

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Synopsis
=======
A bug in Apache may allow a remote attacker to perform a Denial of
Service attack. With certain configurations this could lead to a heap
based buffer overflow.

Background
=========
The Apache HTTP Server Project is an effort to develop and maintain an
open-source HTTP server for modern operating systems. The goal of this
project is to provide a secure, efficient and extensible server that
provides services in tune with the current HTTP standards.

Affected packages
================
    -------------------------------------------------------------------
     Package         /    Vulnerable    /                   Unaffected
    -------------------------------------------------------------------
  1  net-www/apache      <= 2.0.49-r3                     >= 2.0.49-r4
                                                                   < 2

Description
==========
A bug in the protocol.c file handling header lines will cause Apache to
allocate memory for header lines starting with TAB or SPACE.

Impact
=====
An attacker can exploit this vulnerability to perform a Denial of
Service attack by causing Apache to exhaust all memory. On 64 bit
systems with more than 4GB of virtual memory a possible integer
signedness error could lead to a buffer based overflow causing Apache
to crash and under some circumstances execute arbitrary code as the
user running Apache, usually "apache".

Workaround
=========
There is no known workaround at this time. All users are encouraged to
upgrade to the latest available version:

Resolution
=========
Apache 2 users should upgrade to the latest version of Apache:

    # emerge sync

    # emerge -pv ">=net-www/apache-2.0.49-r4"
    # emerge ">=net-www/apache-2.0.49-r4"

References
=========
  [ 1 ] Georgi Guninski security advisory #70, 2004
        https://www.guninski.com/httpd1.html
  [ 2 ] CAN-2004-0493
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0493

Availability
===========
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

    https://security.gentoo.org/glsa/200407-03

Concerns?
========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org/.

License
======
Copyright 2004 Gentoo Technologies, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

https://creativecommons.org/licenses/by-sa/1.0/

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