Apple iOS, iPadOS, and macOS ImageIO Buffer Overflow Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2023-09-11
• EPSS: 53% chance of exploitation in the next 30 days (higher than 99% of CVEs)

[ Description ]Official description

A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 16.6.1 and iPadOS 16.6.1, macOS Monterey 12.6.9, macOS Ventura 13.5.2, iOS 15.7.9 and iPadOS 15.7.9, macOS Big Sur 11.7.10. Processing a maliciously crafted image may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.

CISA: Apple iOS, iPadOS, and macOS contain a buffer overflow vulnerability in ImageIO when processing a maliciously crafted image, which may lead to code execution. This vulnerability was chained with CVE-2023-41061.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 2 Oct 2023): Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

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

• www.openwall.com/lists/oss-security/2023/09/21/4Mailing List
• support.apple.com/en-us/HT213905Release NotesVendor Advisory
• support.apple.com/en-us/HT213906Release NotesVendor Advisory
• support.apple.com/en-us/HT213913Release NotesVendor Advisory
• support.apple.com/en-us/HT213914Release NotesVendor Advisory
• support.apple.com/en-us/HT213915Release NotesVendor Advisory
• support.apple.com/kb/HT213913Release NotesVendor Advisory
• support.apple.com/kb/HT213915Release NotesVendor Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource