Adam Blake has reported a security issue in Cisco Trust Agent, which can be exploited by malicious people to bypass certain security restrictions.
The security issue is caused due to errors in the "user notification" feature, which displays "user notification" messages from the Cisco Secure Access Control Server (ACS) over the top of the login screen or the screen saver unlock window. This allows an attacker to access the "System preference" dialog and e.g. to change the password of administrative users when the system is performing a posture assessment.
Successful exploitation requires physical access to the system.
The vulnerability is reported in version 188.8.131.52 on Mac OS X. Other versions may also be affected.
Note: Installations on Microsoft Windows or Linux are reportedly not affected.
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