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USN-811-1: Firefox and Xulrunner vulnerability

8 August 2009

Firefox and Xulrunner vulnerability




Juan Pablo Lopez Yacubian discovered that Firefox did not properly display
invalid URLs. If a user were tricked into accessing a malicious website, an
attacker could exploit this to spoof the location bar, such as in a
phishing attack. Furthermore, if the malicious website had a valid SSL
certificate, Firefox would display the spoofed page as trusted.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 9.04
Ubuntu 8.10
Ubuntu 8.04

After a standard system upgrade you need to restart Firefox and any
applications that use xulrunner, such as Epiphany, to effect the necessary