USN-690-1: Firefox and xulrunner vulnerabilities

17 December 2008

Firefox and xulrunner vulnerabilities

Releases

Packages

Details

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-2008-5500, CVE-2008-5501, CVE-2008-5502)

It was discovered that Firefox did not properly handle persistent cookie data.
If a user were tricked into opening a malicious website, an attacker could
write persistent data in the user's browser and track the user across browsing
sessions. (CVE-2008-5505)

Marius Schilder discovered that Firefox did not properly handle redirects to
an outside domain when an XMLHttpRequest was made to a same-origin resource.
It's possible that sensitive information could be revealed in the
XMLHttpRequest response. (CVE-2008-5506)

Chris Evans discovered that Firefox did not properly protect a user's data when
accessing a same-domain Javascript URL that is redirected to an unparsable
Javascript off-site resource. If a user were tricked into opening a malicious
website, an attacker may be able to steal a limited amount of private data.
(CVE-2008-5507)

Chip Salzenberg, Justin Schuh, Tom Cross, and Peter William discovered Firefox
did not properly parse URLs when processing certain control characters.
(CVE-2008-5508)

Kojima Hajime discovered that Firefox did not properly handle an escaped null
character. An attacker may be able to exploit this flaw to bypass script
sanitization. (CVE-2008-5510)

Several flaws were discovered in the Javascript engine. If a user were tricked
into opening a malicious website, an attacker could exploit this to execute
arbitrary Javascript code within the context of another website or with chrome
privileges. (CVE-2008-5511, CVE-2008-5512)

Flaws were discovered in the session-restore feature of Firefox. If a user were
tricked into opening a malicious website, an attacker could exploit this to
perform cross-site scripting attacks or execute arbitrary Javascript code with
chrome privileges. (CVE-2008-5513)

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
changes.

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