Fedora Project leader Paul Frields ended speculation on Friday and revealed that the popular Linux implementation's servers have been breached.

"Last week, we discovered that some Fedora servers were illegally accessed," Frields said in a message to Fedora users about the security breach on Friday. "The intrusion into the servers was quickly discovered, and the servers were taken offline."

Fedora's servers have experienced some downtime in the past two weeks, and Frields had previously asked users not to download any new versions of the operating system, leading some observers to speculate that a security breach had occurred. (See Linux Users Speculate Over Fedora Outage.)

One of the compromised Fedora servers was a system used for signing Fedora packages, Frields said. "However, based on our efforts, we have high confidence that the intruder was not able to capture the passphrase used to secure the Fedora package signing key. Based on our review to date, the passphrase was not used during the time of the intrusion on the system, and the passphrase is not stored on any of the Fedora servers."

However, because Fedora packages are distributed via multiple third-party mirrors and repositories, the Fedora project has decided to convert to new Fedora signing keys, Frields said. "This may require affirmative steps from every Fedora system owner or administrator," he warned.

Frields said there is "little risk" to Fedora users who want to install or upgrade signed Fedora packages. Our previous warnings against further package updates were based on an abundance of caution, out of respect for our users," he said. "This is also why we are proceeding with plans to change the Fedora package signing key."

While Frields was issuing his warning, Red Hat also issued its own advisory on a security breach. "Last week, Red Hat detected an intrusion on certain of its computer systems and took immediate action," the advisory states.

"While the investigation into the intrusion is on-going, our initial focus was to review and test the distribution channel we use with our customers, Red Hat Network(RHN) and its associated security measures," the company said. "Based on these efforts, we remain highly confident that our systems and processes prevented the intrusion from compromising RHN or the content distributed via RHN, and accordingly believe that customers who keep their systems updated using Red Hat Network are not at risk."

The advisory is mainly for "those who may obtain Red Hat binary packages via channels other than those of official Red Hat subscribers," Red Hat said.

"It is important to note that the effects of the intrusion on Fedora and Red Hat are *not* the same," Frields wrote. "Accordingly, the Fedora package signing key is not connected to, and is different from, the one used to sign Red Hat Enterprise Linux packages."

Frields said the Fedora Project will contact users soon to let them know how to handle they change in signing keys.

— Tim Wilson, Site Editor, Dark Reading