Current versions of Apple products use the updated version of Bonjour. For previous versions, Apple has issued a security update.
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Apple has issued a security update for mDNSResponder, the low-level open source software that implements Bonjour in Apple and third-party products.
Which Apple platforms are affected?
OS X:
• Versions prior to OS X El Capitan v10.11.1
• Versions prior to OS X Yosemite v10.10.5 with Security Update 2015-004 Yosemite
• Versions prior to OS X Mavericks v10.9.5 with Security Update 2015-007 Mavericks
• iOS versions prior to iOS 9.1
• watchOS versions prior to watchOS 2.1
• AirPort Base Station Firmware versions prior to 7.7.7 and 7.6.7
Apple has coordinated with many third-party vendors to make sure that they are aware of the availability of this update. For non-Apple products, Apple suggests that you reach out to your vendor to determine if a product you use is affected and whether the vendor has already updated their product.