About the security content of iOS 12.5.3
This document describes the security content of iOS 12.5.3.
About Apple security updates
For our customers' protection, Apple doesn't disclose, discuss or confirm security issues until an investigation has taken place and patches or releases are available. Recent releases are listed on the Apple security updates page.
Apple security documents reference vulnerabilities by CVE-ID when possible.
For more information about security, see the Apple Product Security page.
iOS 12.5.3
WebKit
Available for: iPhone 5s, iPhone 6, iPhone 6 Plus, iPad Air, iPad mini 2, iPad mini 3, and iPod touch (6th generation)
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 buffer overflow issue was addressed with improved memory handling.
CVE-2021-30666: yangkang (@dnpushme)&zerokeeper&bianliang of 360 ATA
WebKit
Available for: iPhone 5s, iPhone 6, iPhone 6 Plus, iPad Air, iPad mini 2, iPad mini 3, and iPod touch (6th generation)
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-2021-30665: yangkang (@dnpushme)&zerokeeper&bianliang of 360 ATA
WebKit
Available for: iPhone 5s, iPhone 6, iPhone 6 Plus, iPad Air, iPad mini 2, iPad mini 3, and iPod touch (6th generation)
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: An integer overflow was addressed with improved input validation.
CVE-2021-30663: an anonymous researcher
WebKit Storage
Available for: iPhone 5s, iPhone 6, iPhone 6 Plus, iPad Air, iPad mini 2, iPad mini 3, and iPod touch (6th generation)
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-2021-30661: yangkang (@dnpushme)&zerokeeper&bianliang of 360 ATA
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