Use-after-free vulnerability in Apple Safari 5.1.2, when a plug-in with a blocking function is installed, allows user-assisted remote attackers to execute arbitrary code via a crafted web page that is accessed during user interaction with the plug-in, leading to improper coordination between an API call and the plug-in unloading functionality, as demonstrated by the Adobe Flash and RealPlayer plug-ins.
CVSS Severity (version 2.0):
Impact Subscore: 10.0
Exploitability Subscore: 4.9
CVSS Version 2 Metrics:
Access Vector: Network exploitable; Victim must voluntarily interact with attack mechanism
Access Complexity: High
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service
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Vulnerable software and versions