Addressing a vulnerability that could have potentially resulted in remote code execution, Apple announced a firmware update for several of its AirPort Wi-Fi products on Monday.
According to an Apple mailing list notification, firmware updates 7.6.7 and 7.7.7 have been applied to AirPort Express, AirPort Extreme and AirPort Time Capsule base stations using the 802.11n Wi-Fi standard, as well as AirPort Extreme and AirPort Time Capsule base stations with the 802.11ac standard and using AirPort Utility for Mac or iOS.
Apple described the vulnerability – officially designated as CVE-2015-7029 – as a memory corruption issue existing in the DNS data parsing process. “This issue was addressed through improved bounds checking,” the notification explained.
Sophos senior security advisor Paul Ducklin wrote in a Naked Security article that the bug – originally discovered nine months ago – is probably exploitable “by feeding malformed replies to an AirPort that makes outbound DNS requests on behalf of the devices on its internal network”.