apple safari CVE-2021-30661 vulnerability in Apple Products
Published on September 8, 2021

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A use after free issue was addressed with improved memory management. This issue is fixed in Safari 14.1, iOS 12.5.3, iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5, macOS Big Sur 11.3. 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..

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Known Exploited Vulnerability

This Apple iOS Webkit Storage Use-After-Free Remote Code Execution Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. 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.

The following remediation steps are recommended / required by November 17, 2021: Apply updates per vendor instructions.

Vulnerability Analysis

CVE-2021-30661 can be exploited with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. It has an exploitability score of 2.8 out of four. The potential impact of an exploit of this vulnerability is considered to be very high.

What is a Dangling pointer Vulnerability?

Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.

CVE-2021-30661 has been classified to as a Dangling pointer vulnerability or weakness.


Products Associated with CVE-2021-30661

You can be notified by stack.watch whenever vulnerabilities like CVE-2021-30661 are published in these products:

Apple Safari
 
Apple iPadOS
 
Apple iOS
 
Apple macOS
 
Apple tvOS
 
Apple watchOS
 

What versions are vulnerable to CVE-2021-30661?