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USN-2557-1: Firefox vulnerability

7 April 2015

Firefox could be made to bypass SSL certificate verification.



  • firefox - Mozilla Open Source web browser


Muneaki Nishimura discovered a flaw in Mozilla's HTTP Alternative Services
implementation which meant SSL certificate verification could be bypassed
in some circumstances. A remote attacker could potentially exploit this to
conduct a machine-in-the-middle attack. (CVE-2015-0799)

Update instructions

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

Ubuntu 14.10
Ubuntu 14.04
Ubuntu 12.04

After a standard system update you need to restart Firefox to make
all the necessary changes.