CVE-2021-30773

This exploit article is a "stub", an incomplete page. Please add more content to this article and remove this tag.

In July 2021, Apple released iOS 14.7, and the security notes mention:

Identity Service

Available for: iPhone 6s and later, iPad Pro (all models), iPad Air 2 and later, iPad 5th generation and later, iPad mini 4 and later, and iPod touch (7th generation)

Impact: A malicious application may be able to bypass code signing checks

Description: An issue in code signature validation was addressed with improved checks.

CVE-2021-30773: Linus Henze (pinauten.de)

Diffing 14.6 and 14.7 shows no changes in IDS frameworks, and the only change in the identityservicesd daemon is in IDSIDStatusQueryController, methods _loadCache and _saveCache. This seems unlikely to be related to "code signature validation".

It's all weird enough that it's even possible that Apple screwed up the vulnerability description, and 30773 is either unrelated to code signing or unrelated to IDS.

This vulnerability is apparently used in Linus Henze's untethered jailbreak PoC.

Research continues...