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TUCoPS :: Phreaking Cellular - Major Manufacturers :: bt-21807.htm

Palm Pre WebOS version <= 1.1 Floating Point Exception



Palm Pre WebOS version <= 1.1 Floating Point Exception
Palm Pre WebOS version <= 1.1 Floating Point Exception



I.  Description

The Palm Pre WebOS version <= 1.1 suffers from a floating point exception vulnerability when attempting to view a specially crafted web page. This vulnerability has been addressed in the latest patch from Palm and all users are recommended to update to WebOS version 1.2+.

II.  Impact

If a user views a malicious web page that contains specially crafted data, the "LunaSysMgr" process will crash, causing the device to simulate a reboot.  The bug itself is a floating point exception that crashes the "LunaSysMgr" process and forces the device to restart the process, simulating a reboot of the system.  At the time of the discovery, the greatest risk to the system was a denial of service condition. 

The crash does not occur when viewing the malicious web page while in landscape mode.

III. Proof of Concept

The Palm Pre WebOS version <= 1.1 will crash upon opening a web page that contains 50,280 bytes of data or greater and attempts to refresh the page.  Upon viewing the malicious web page the LunaSysMgr process will generate a floating point exception and simulate a system "reboot".

The following code will trigger the issue

"AAAAA..." using 50280 or more characters after the refresh.

IV. About

This vulnerability was discovered by Townsend Ladd Harris 

Vulnerability details will be posted at: http://tlhsecurity.blogspot.com/2009/10/palm-pre-webos-version-11-floating.html 






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