Apple iOS and macOS Out-of-Bounds Write Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2022-08-18

[ Description ]Official description

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 15.6.1 and iPadOS 15.6.1, macOS Monterey 12.5.1. An application may be able to execute arbitrary code with kernel privileges. Apple is aware of a report that this issue may have been actively exploited.

CISA: Apple iOS and macOS contain an out-of-bounds write vulnerability that could allow an application to execute code with kernel privileges.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 8 Sep 2022): Apply updates per vendor instructions.

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• seclists.org/fulldisclosure/2022/Aug/16Mailing ListThird Party Advisory
• seclists.org/fulldisclosure/2022/Oct/45Mailing ListThird Party Advisory
• seclists.org/fulldisclosure/2022/Oct/49Mailing ListThird Party Advisory
• support.apple.com/en-us/HT213412Release NotesVendor Advisory
• support.apple.com/en-us/HT213413Release NotesVendor Advisory
• support.apple.com/kb/HT213443Third Party Advisory
• support.apple.com/kb/HT213486Third Party Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource