Ubuntu Security Notice USN-160-1
4th August, 2005
apache2 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 5.04
- Ubuntu 4.10
Details
Marc Stern discovered a buffer overflow in the SSL module's
certificate revocation list (CRL) handler. If Apache is configured to
use a malicious CRL, this could possibly lead to a server crash or
arbitrary code execution with the privileges of the Apache web server.
(CAN-2005-1268)
Watchfire discovered that Apache insufficiently verified the
"Transfer-Encoding" and "Content-Length" headers when acting as an
HTTP proxy. By sending a specially crafted HTTP request, a remote
attacker who is authorized to use the proxy could exploit this to
bypass web application firewalls, poison the HTTP proxy cache, and
conduct cross-site scripting attacks against other proxy users.
(CAN-2005-2088)
Update instructions
The problem can be corrected by updating your system to the following package version:
- Ubuntu 5.04:
- apache2-mpm-worker
- apache2-mpm-perchild
- apache2-mpm-threadpool
- apache2-mpm-prefork
- Ubuntu 4.10:
- apache2-mpm-worker
- apache2-mpm-perchild
- apache2-mpm-threadpool
- apache2-mpm-prefork
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
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