CVE-2021-30762 is a vulnerability in Apple iOS
Published on September 8, 2021

A use after free issue was addressed with improved memory management. This issue is fixed in iOS 12.5.4. 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..

Vendor Advisory NVD

Known Exploited Vulnerability

This Apple WebKit Browser Engine Use-After-Free Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Use after free issue. 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-2021-30762 is exploitable 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-2021-30762 has been classified to as a Dangling pointer vulnerability or weakness.

Products Associated with CVE-2021-30762

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Apple iOS

What versions of iOS are vulnerable to CVE-2021-30762?