2021-30775 | Apple watchOS CoreAudio memory corruption (HT212605)

By Max On Jul 23, 2021

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6.0	$0-$5k	0.46+

A vulnerability was found in Apple watchOS up to 7.5 (Smartwatch Operating System) and classified as critical. This issue affects an unknown functionality of the component CoreAudio. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. Impacted is confidentiality, integrity, and availability.

The weakness was disclosed 07/19/2021 by JunDong Xie as HT212605 as confirmed advisory (Website). The advisory is shared at support.apple.com. The identification of this vulnerability is CVE-2021-30775. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/23/2021). The advisory points out:

Processing a maliciously crafted audio file may lead to arbitrary code execution

Upgrading to version 7.6 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark: