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[USN-1197-1] Firefox and Xulrunner vulnerability

Posted on 01 September 2011
Ubuntu Security

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Ubuntu Security Notice USN-1197-1
September 01, 2011

firefox, xulrunner-1.9.2 vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 11.04
- Ubuntu 10.10
- Ubuntu 10.04 LTS

Summary:

A certificate authority issued fraudulent certificates.

Software Description:
- firefox: Mozilla Open Source web browser
- xulrunner-1.9.2: Mozilla Gecko runtime environment

Details:

It was discovered that Dutch Certificate Authority DigiNotar, had
mis-issued multiple fraudulent certificates. These certificates could all=
ow
an attacker to perform a "man in the middle" (MITM) attack which would ma=
ke
the user believe their connection is secure, but is actually being
monitored.

For the protection of its users, Mozilla has removed the DigiNotar
certificate. Sites using certificates issued by DigiNotar will need to se=
ek
another certificate vendor.

We are currently aware of a regression that blocks one of two Staat der
Nederlanden root certificates which are believed to still be secure. This=

regression is being tracked at https://launchpad.net/bugs/838322.

Update instructions:

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

Ubuntu 11.04:
firefox 6.0.1+build1+nobinonly-0ubuntu0.11.04.1=


Ubuntu 10.10:
firefox 3.6.21+build1+nobinonly-0ubuntu0.10.10.=
1
xulrunner-1.9.2 1.9.2.21+build1+nobinonly-0ubuntu0.10.1=
0.1

Ubuntu 10.04 LTS:
firefox 3.6.21+build1+nobinonly-0ubuntu0.10.04.=
1
xulrunner-1.9.2 1.9.2.21+build1+nobinonly-0ubuntu0.10.0=
4.1

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

References:
http://www.ubuntu.com/usn/usn-1197-1
https://launchpad.net/bugs/837557, https://launchpad.net/bugs/838322

Package Information:
https://launchpad.net/ubuntu/+source/firefox/6.0.1+build1+nobinonly-0ub=
untu0.11.04.1
https://launchpad.net/ubuntu/+source/firefox/3.6.21+build1+nobinonly-0u=
buntu0.10.10.1
https://launchpad.net/ubuntu/+source/xulrunner-1.9.2/1.9.2.21+build1+no=
binonly-0ubuntu0.10.10.1
https://launchpad.net/ubuntu/+source/firefox/3.6.21+build1+nobinonly-0u=
buntu0.10.04.1
https://launchpad.net/ubuntu/+source/xulrunner-1.9.2/1.9.2.21+build1+no=
binonly-0ubuntu0.10.04.1




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