Home Business IT Security Mozilla bug tracker breached, Firefox zero-day bugs exposed

Mozilla bug tracker breached, Firefox zero-day bugs exposed

The Mozilla project has disclosed that its Bugzilla bug tracker was compromised and the attacker gained information about unpatched zero-day vulnerabilities.

In a post on its blog — titled "Improving security for Bugzilla" — the project said that it had reason to believe that the stolen information was being used to attack Firefox users.

The attacker gained access to the bug tracker by utilising the credentials of an existing account belonging to a privileged user. That account has since been shut down. The attacker may have had access to the bug tracker for as long as two years.

The project said the attacker had gained access to information about 185 non-public bugs of which 110 were protected because they were proprietary information, 22 minor bugs and 53 severe vulnerabilities.

Of these 53, a total of 43 had been fixed in the released version of Firefox at the time the attacker found out about them. In the case of the other 10, the attacker had a window of less than seven days for two and between seven and 36 days for five, before they were patched.

But in the case of the remaining three, there were big time intervals between the attacker gaining information about them and fixes being issued: 131 days in one case, 157 in a second, and 335 in a third.

The largest known impact so far has been through a vulnerability that was fixed on August 6. This vulnerability was exploited to collect private data from users visiting a news site in Russia.

Users have been advised to update to the version of Firefox released on August 27 which fixed all the vulnerabilities which the attacked had learned about and could have used to harm Firefox users.

From now on, all those who had access to security-sensitive information within the bug tracker would be required to use two-factor authentication, the project said.


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Sam Varghese

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A professional journalist with decades of experience, Sam for nine years used DOS and then Windows, which led him to start experimenting with GNU/Linux in 1998. Since then he has written widely about the use of both free and open source software, and the people behind the code. His personal blog is titled Irregular Expression.