Mac OS X software update temporarily broken, likely due to expired SSL certificate

Apple’s SSL certificate that is responsible for verifying and authenticating connections to Apple’s Mac App Store software update servers has expired, causing the Mac App Store to issue errors like those above. Another error notification points to the swscan.apple.com server as being the issue, below.

Server-cert-error

 

A quick search shows that this SSL certificate expired yesterday May 24th at midnight.

Screenshot 2014-05-25 13.11.59


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Security consultant takes less than a day to exploit OS X bug to capture all SSL traffic

ssl

Update: The bug has been fixed in OS X 10.9.2

Security consultant Aldo Cortesi said in a blog post (via ZDNet) that it took him less than a day to exploit the goto fail bug in OS X to capture all SSL traffic, and that there’s a good chance he isn’t the first to have done so – an implicit suggestion that the vulnerability may already be being used in man-in-the-middle attacks.

I’ve confirmed full transparent interception of HTTPS traffic on both IOS (prior to 7.0.6) and OSX Mavericks. Nearly all encrypted traffic, including usernames, passwords, and even Apple app updates can be captured. This includes:

  • App store and software update traffic
  • iCloud data, including KeyChain enrollment and updates
  • Data from the Calendar and Reminders
  • Find My Mac updates
  • Traffic for applications that use certificate pinning, like Twitter …  Read more

Apple patched a major SSL bug in iOS yesterday, but OS X is still at risk

SSL-Bug-OSX

Update: Apple says an OS X fix is coming soon.

Yesterday Apple released iOS update 7.0.6 alongside new builds for iOS 6 and Apple TV  that it said provided “a fix for SSL connection verification.” While Apple didn’t provide much specific information on the bug, it wasn’t long before the answer was at the top of Hacker News. It turns out that minor security fix was actually a major flaw that could in theory allow attackers to intercept communications between affected browsers and just about any SSL-protected site. Not only that, but the bug is also present in current builds of OS X that Apple has yet to release a security patch for.

Researchers from CrowdStrike described the bug in a report:

“To pull off the attack an adversary has to be able to Man-in-The-Middle (MitM) network connections, which can be done if they are present on the same wired or wireless network as the victim. Due to a flaw in authentication logic on iOS and OS X platforms, an attacker can bypass SSL/TLS verification routines upon the initial connection handshake. This enables an adversary to masquerade as coming from a trusted remote endpoint, such as your favorite webmail provider and perform full interception of encrypted traffic between you and the destination server, as well as give them a capability to modify the data in flight (such as deliver exploits to take control of your system),”

Adam Langley, a senior software engineer at Google, also wrote about the flaw on his blog ImperialViolet and created a test site to check if you have the bug (pictured above): Read more