Apache 2 vulnerabilities

Releases

• Ubuntu 5.04
• Ubuntu 4.10

Details

Apache did not honour the “SSLVerifyClient require” directive within a

block if the surrounding block contained a
directive “SSLVerifyClient optional”. This allowed clients to bypass
client certificate validation on servers with the above configuration.
(CAN-2005-2700)

Filip Sneppe discovered a Denial of Service vulnerability in the byte
range filter handler. By requesting certain large byte ranges, a
remote attacker could cause memory exhaustion in the server.
(CAN-2005-2728)

The updated libapache-mod-ssl also fixes two older Denial of Service
vulnerabilities: A format string error in the ssl_log() function which
could be exploited to crash the server (CAN-2004-0700), and a flaw in
the SSL cipher negotiation which could be exploited to terminate a
session (CAN-2004-0885). Please note that Apache 1.3 and
libapache-mod-ssl are not officially supported (they are in the
“universe” component of the Ubuntu archive).