USN-821-1: Firefox and Xulrunner vulnerabilities

10 September 2009

Firefox and Xulrunner vulnerabilities

Releases

Packages

Details

Several flaws were discovered in the Firefox browser and JavaScript
engines. If a user were tricked into viewing a malicious website, a remote
attacker could cause a denial of service or possibly execute arbitrary code
with the privileges of the user invoking the program. (CVE-2009-3070,
CVE-2009-3071, CVE-2009-3072, CVE-2009-3074, CVE-2009-3075)

Jesse Ruderman and Dan Kaminsky discovered that Firefox did not adequately
inform users when security modules were added or removed via PKCS11. If
a user visited a malicious website, an attacker could exploit this to
trick the user into installing a malicious PKCS11 module. (CVE-2009-3076)

It was discovered that Firefox did not properly manage memory when using
XUL tree elements. If a user were tricked into viewing a malicious website,
a remote attacker could cause a denial of service or possibly execute
arbitrary code with the privileges of the user invoking the program.
(CVE-2009-3077)

Juan Pablo Lopez Yacubian discovered that Firefox did properly display
certain Unicode characters in the location bar and other text fields when
using a certain non-Ubuntu font. If a user configured Firefox to use this
font, an attacker could exploit this to spoof the location bar, such as in
a phishing attack. (CVE-2009-3078)

It was discovered that the BrowserFeedWriter in Firefox could be subverted
to run JavaScript code from web content with elevated chrome privileges.
If a user were tricked into viewing a malicious website, an attacker could
exploit this to execute arbitrary code with the privileges of the user
invoking the program. (CVE-2009-3079)

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
changes.

Related notices