USN-873-1

A security issue affects the following Ubuntu releases:

Ubuntu 8.04 LTS
Ubuntu 8.10
Ubuntu 9.04

This advisory also applies to the corresponding versions of
Kubuntu, Edubuntu, and Xubuntu.

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

Ubuntu 8.04 LTS:
firefox-3.0 3.0.16+nobinonly-0ubuntu0.8.04.1
xulrunner-1.9 1.9.0.16+nobinonly-0ubuntu0.8.04.1

Ubuntu 8.10:
abrowser 3.0.16+nobinonly-0ubuntu0.8.10.1
firefox-3.0 3.0.16+nobinonly-0ubuntu0.8.10.1
xulrunner-1.9 1.9.0.16+nobinonly-0ubuntu0.8.10.1

Ubuntu 9.04:
abrowser 3.0.16+nobinonly-0ubuntu0.9.04.1
firefox-3.0 3.0.16+nobinonly-0ubuntu0.9.04.1
xulrunner-1.9 1.9.0.16+nobinonly-0ubuntu0.9.04.1

After a standard system upgrade you need to restart Firefox and any
applications that use xulrunner to effect the necessary changes.

Details follow:

Jesse Ruderman, Josh Soref, Martijn Wargers, Jose Angel, Olli Pettay, and
David James discovered several flaws in the browser and JavaScript engines
of Firefox. 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-2009-3979, CVE-2009-3981, CVE-2009-3986)

Takehiro Takahashi discovered flaws in the NTLM implementation in Firefox.
If an NTLM authenticated user visited a malicious website, a remote
attacker could send requests to other applications, authenticated as the
user. (CVE-2009-3983)

Jonathan Morgan discovered that Firefox did not properly display SSL
indicators under certain circumstances. This could be used by an attacker
to spoof an encrypted page, such as in a phishing attack. (CVE-2009-3984)

Jordi Chancel discovered that Firefox did not properly display invalid URLs
for a blank page. 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. (CVE-2009-3985)