GLSA 200407-03: Apache 2: Remote denial of service attack
| Severity: | normal |
| Title: | Apache 2: Remote denial of service attack |
| Date: | 07/04/2004 |
| Bugs: | |
| ID: | 200407-03 |
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 | Architecture(s) |
|---|---|---|---|
| www-servers/apache | <= 2.0.49-r3 | >= 2.0.49-r4 | All supported architectures |
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 ">=www-servers/apache-2.0.49-r4"
# emerge ">=www-servers/apache-2.0.49-r4"
References
Availability
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
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 2010 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.