USN-878-1

A security issue affects the following Ubuntu releases:

Ubuntu 9.10

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 9.10:
firefox-3.5 3.5.7+nobinonly-0ubuntu0.9.10.1
xulrunner-1.9.1 1.9.1.7+nobinonly-0ubuntu0.9.10.1

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

Details follow:

USN-874-1 fixed vulnerabilities in Firefox and Xulrunner. The upstream
changes introduced a regression when using NTLM authentication. This update
fixes the problem and added additional stability fixes.

We apologize for the inconvenience.

Original advisory details:
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-2009-3980, CVE-2009-3982, 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)

David Keeler, Bob Clary, and Dan Kaminsky discovered several flaws in third
party media libraries. If a user were tricked into opening a crafted media
file, a remote attacker could cause a denial of service or possibly execute
arbitrary code with the privileges of the user invoking the program.
(CVE-2009-3388, CVE-2009-3389)