Apple Safari before 4.0.5 on Windows does not properly validate external URL schemes, which allows remote attackers to open local files and execute arbitrary code via a crafted HTML document.
Available for: Windows 7, Vista, XP
Impact: Visiting a maliciously crafted website may lead to arbitrary
Description: An issue in Safari's handling of external URL schemes
may cause a local file to be opened in response to a URL encountered
on a web page. Visiting a maliciously crafted website may lead to
arbitrary code execution. This update addresses the issue through
improved validation of external URLs. This issue does not affect Mac
OS X systems. Credit to Billy Rios and Microsoft Vulnerability
Research (MSVR) for reporting this issue.
CVSS Severity (version 2.0):
Impact Subscore: 10.0
Exploitability Subscore: 8.6
CVSS Version 2 Metrics:
Access Vector: Network exploitable; Victim must voluntarily interact with attack mechanism
Access Complexity: Medium
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service
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