USN-160-1: Apache 2 vulnerabilities

Releases

• 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 versions:

Ubuntu 5.04

• apache2-mpm-worker -
• apache2-mpm-perchild -
• apache2-mpm-prefork -
• apache2-mpm-threadpool -

Ubuntu 4.10

• apache2-mpm-worker -
• apache2-mpm-perchild -
• apache2-mpm-prefork -
• apache2-mpm-threadpool -

In general, a standard system update will make all the necessary changes.

References

• CVE-2005-1268
• CVE-2005-2088