Mozilla Firefox Unicode Characters Remote Buffer Overflow Vulnerability
IntelliShield: Security Activity Bulletin
2009 July 16 01:36 GMT
2009 July 20 14:44 GMT
Mozilla has confirmed the Firefox Unicode characters remote buffer overflow vulnerability can be exploited to cause a DoS condition. It is not exploitable for code execution. Updates are not available.
Mozilla Firefox versions 3.5 and 3.5.1 contain a vulnerability that could allow an unauthenticated, remote attacker to cause the affected software to crash.
The vulnerability is due to a lack of bounds checking when the application handles Unicode characters. An unauthenticated, remote attacker could exploit this vulnerability by creating a malicious web page that contains crafted Unicode characters. By convincing a user to visit the page, the attacker could cause a stack-based buffer overflow that is not exploitable for code execution. An exploit could cause the application to crash.
Exploit code is publicly available which can crash the affected browser.
Mozilla has confirmed this vulnerability; however, software updates are not available.
Cisco Systems Cisco Intrusion Prevention System (IPS) 6.0
Version 1, July 15, 2009, 9:36 PM: Mozilla Firefox contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code with the privileges of the user. Updates are not available.
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