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USN-546-2: Firefox regression

4 December 2007

Firefox regression

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Releases

Packages

Details

USN-546-1 fixed vulnerabilities in Firefox. The upstream update included
a faulty patch which caused the drawImage method of the canvas element to
fail. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

It was discovered that Firefox incorrectly associated redirected sites
as the origin of "jar:" contents. A malicious web site could exploit this
to modify or steal confidential data (such as passwords) from other web
sites. (CVE-2007-5947)

Various flaws were discovered in the layout and JavaScript engines. By
tricking a user into opening a malicious web page, an attacker could
execute arbitrary code with the user's privileges. (CVE-2007-5959)

Gregory Fleischer discovered that it was possible to use JavaScript to
manipulate Firefox's Referer header. A malicious web site could exploit
this to conduct cross-site request forgeries against sites that relied
only on Referer headers for protection from such attacks. (CVE-2007-5960)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 7.10
Ubuntu 7.04
Ubuntu 6.10

After a standard system upgrade you need to restart Firefox to effect
the necessary changes.