Apple patches critical OS X SSL bug with Mavericks update

It releases OS X 10.9.2 with nearly three dozen security fixes, also adds FaceTime audio calls

Apple today updated OX Mavericks, plugging the embarrassing SSL security hole that the company left wide open in the operating system's implementation of basic Internet encryption.

Mac users running Mavericks should update as soon as possible, as exploit code has already begun circulating on the Internet. Apple had the same flaw in iOS, which it patched over the weekend.

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OS X 10.9.2, which weighed in at between 460MB and 860MB for the download, patches the vulnerability, according to tests conducted by Computerworld using the gotofail.com website, which indicated that the Safari browser was again secure.

The update, the first since mid-December, patched 32 other vulnerabilities in various versions of OS X, including six in QuickTime, Apple's media player, and more disturbing, four bugs that could be used by attackers to bypass the application sandbox, an isolation technology designed to minimize damage when malware does make it onto a Mac.

But CVE-2014-1266, the identifier for the bug in Mavericks' handling of SSL (Secure Socket Layer) and TLS (Transport Layer Security), was the one that stood out. Those protocols create an encrypted connection between a personal computer and a server -- such as one at Amazon.com -- so that snoopers cannot read the traffic and extract information like credit card numbers or login credentials.

The flaw had been dubbed the "gotofail" bug because Apple left an extraneous "goto" command in the code that validated SSL certificates, a monumental oversight that many security experts blasted Apple for not catching during development and testing, or in the 16 months since the release of iOS 6, where it first appeared.

Apple took heat for the delay in patching Mavericks; it issued updates for iOS 6 and iOS 7 on Feb. 21 that plugged the gotofail hole.

"How difficult is it to release for OS X?" asked Andrew Storms, director of DevOps at security firm CloudPassage, in an interview yesterday. "Shouldn't it have been out an hour later?"

Storms defended his criticism, and that of other security professionals. "We all know what happens. Whenever patches don't appear simultaneously, attackers mine it in one version for others. It's the gateway for finding the bug," Storms said.

In a separate security-only update, Apple patched four vulnerabilities in 2012's Safari 6, pushing the version number to 6.1.2. Safari 6 is the most current edition of Apple's browser for OS X 10.7 Lion and OS X 10.8 Mountain Lion. Those flaws were also fixed in Safari 7, taking it up to 7.0.2, for Mavericks, which was included with the 10.9.2 update.

Along with the vulnerability patches in OS X 10.9.2, Apple also provided several nonsecurity fixes to deal with reliability, stability, and performance issues, as well as a few that beefed up some integrated features and tools.

Mac users can now make and take audio-only calls using FaceTime, OS X's built-in video conferencing software, and block incoming iMessages from individual users. iMessage is OS X's and iOS's integrated chat and texting client that lets users bypass carriers' SMS fees when sending and receiving messages to and from iOS and OS X devices.

OS X 10.9.2 addressed other problems as well, resolving one that prevented Mail from receiving some email messages; fixing another that erratically disconnected VPN connections, which are often used by workers to connect to their businesses' networks; and tackling two related to how Mail handled Google Gmail mailboxes and message labels.

Apple posted a longer list of 10.9.2's contents on its website.

OS X 10.9.2 and Safari 6.1.2 can be retrieved by choosing Software Update from the Apple menu, or by opening the Mac App Store application and clicking the Update icon at the top right. Mavericks 10.9.2 can also be downloaded manually from Apple's support site.

Gotofail.com, one of several online tests sites, with OS X 10.9.2's Safari shows that Apple fixed the embarrassing flaw.

Gregg Keizer covers Microsoft, security issues, Apple, Web browsers and general technology breaking news for Computerworld. Follow Gregg on Twitter at @gkeizer, or subscribe to Gregg's RSS feed . His email address is gkeizer@computerworld.com.. Read more about security in Computerworld's Security Topic Center.

This story, "Apple patches critical OS X SSL bug with Mavericks update" was originally published by Computerworld.

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