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USN-717-1: Firefox and Xulrunner vulnerabilities

10 February 2009

Firefox and Xulrunner vulnerabilities




Several flaws were discovered in the browser engine. These problems could allow
an attacker to crash the browser and possibly execute arbitrary code with user
privileges. (CVE-2009-0352, CVE-2009-0353)

A flaw was discovered in the JavaScript engine. An attacker could bypass the
same-origin policy in Firefox by utilizing a chrome XBL method and execute
arbitrary JavaScript within the context of another website. (CVE-2009-0354)

A flaw was discovered in the browser engine when restoring closed tabs. If a
user were tricked into restoring a tab to a malicious website with form input
controls, an attacker could steal local files on the user's system.

Wladimir Palant discovered that Firefox did not restrict access to cookies in
HTTP response headers. If a user were tricked into opening a malicious web
page, a remote attacker could view sensitive information. (CVE-2009-0357)

Paul Nel discovered that Firefox did not honor certain Cache-Control HTTP
directives. A local attacker could exploit this to view private data in
improperly cached pages of another user. (CVE-2009-0358)

Update instructions

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

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

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