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'Bash' Security Flaw in OS X Allows for Malicious Attacks on Devices and Services
Security researcher Robert Graham noted on his blog that the Bash exploit is "as big as Heartbleed," referring to the flaw discovered earlier this year in the popular OpenSSL software which secures connections between clients and servers:
Internet-of-things devices like video cameras are especially vulnerable because a lot of their software is built from web-enabled bash scripts. Thus, not only are they less likely to be patched, they are more likely to expose the vulnerability to the outside world.Heartbleed was said to have affected 66% of the Internet, although Apple announced in April that the exploit did not affect its software or "key services." Apple also released updates for the AirPort Extreme and Time Capsule to better secure both web devices against Heartbleed.
Unlike Heartbleed, which only affected a specific version of OpenSSL, this bash bug has been around for a long, long time. That means there are lots of old devices on the network vulnerable to this bug. The number of systems needing to be patched, but which won't be, is much larger than Heartbleed.
A topic discussing the Bash exploit on StackExchange also notes that Apple did not include a fix for the bug in its latest round of security updates that came alongside the release of OS X Mavericks 10.9.5 last week. It is possible however that Apple will release a fix for OS X in the near future to address the exploit, similar to what it has done for other security issues in the past.