Apple doesn’t often update devices that aren’t on the latest version of iOS and iPadOS, so when they do you should take notice. And this week’s release of iOS 12.5.4 definitely falls into the “critical” category.
iOS 12.5.4 is for iPhone 5s, iPhone 6, iPhone 6 Plus, iPad Air, iPad mini 2, iPad mini 3, and iPod touch (6th generation). It patches WebKit vulnerabilities which have been exploited in the wild.
Security
Impact: Processing a maliciously crafted certificate may lead to arbitrary code execution
Description: A memory corruption issue in the ASN.1 decoder was addressed by removing the vulnerable code.
CVE-2021-30737: xerub
WebKit
Impact: Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.
Description: A memory corruption issue was addressed with improved state management.
CVE-2021-30761: an anonymous researcher
WebKit
Impact: Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.
Description: A use after free issue was addressed with improved memory management.
CVE-2021-30762: an anonymous researcher
The CVE-2021-30737 vulnerability was fixed for iOS 14 users in the iOS 14.6 update that released in May. The two other WebKit fixes will likely be patched in iOS 14.7, which is currently in beta testing. Apple usually pushed out software updates within similar time frames, so it could signal iOS 14.7’s imminent release, but as such, two WebKit vulnerabilities remain unpatched and exploitable.
Michael Simon has been covering Apple since the iPod was the iWalk. His obsession with technology goes back to his first PC—the IBM Thinkpad with the lift-up keyboard for swapping out the drive. He’s still waiting for that to come back in style tbh.
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