Symantec released a new Client Intrusion Detection System (CIDS) 14.1 engine update. The new engine update is listed as “Client Intrusion Detection System signatures 12.1 RU5” and is versioned “revision 10/23/2014 r12”. As part of this update the new engine removes the dependency of the Browser Intrusion Prevention functionality in the CIDS engine from browser plugins/add-ons. After clients received this update we have reports that Internet Explorer may hang unexpectedly or the system may freeze and become unresponsive.
Symantec has altered the CIDS injection code to avoid this condition. Additional protections were added to avoid injecting into the same process twice. We have created new content with an updated engine to fix this issue. Test content is available to confirm compatibility in your environment and can be made available through Symantec Technical Support. Symantec is releasing a new CIDS engine for all 12.1 versions of SEP up to RU5 in a staged rollout beginning in early December 2014. Please refer to KB document TECH206118 for information about the staged rollout.
In preparation for the new engine release, please refer to KB document TECH164924, to prevent the pop-up messages indicating that the "Browser Intrusion Prevention is malfunctioning. Check the System logs for details."