Old Versions of Cisco AnyConnect and Java 6u29
By Weijun-Oracle on Nov 08, 2011
Unfortunately, it seems quite a lot of AnyConnect servers out there are not updated to the latest version. Some are not that ancient, which do no harm to a Windows client, but can still be exploited if the client is on a non-Windows system like Linux or Apple MacOS X. Read the Cisco page above for details.
Therefore, 6u29 users will see an error when trying to install AnyConnect clients from such a server, for example, this report to Cisco. AnyConnect admins, please update your server as soon as possible.
Please note that this is not a vulnerability in Oracle's JRE. On the contrary, 6u29 protects you from any possible exploit of this issue to damage your system.