apple ios CVE-2021-30761 is a vulnerability in Apple iOS
Published on September 8, 2021

A memory corruption issue was addressed with improved state 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 Memory Corruption Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Memory corruption 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-2021-30761 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 Memory Corruption Vulnerability?

The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.

CVE-2021-30761 has been classified to as a Memory Corruption vulnerability or weakness.


Products Associated with CVE-2021-30761

You can be notified by stack.watch whenever vulnerabilities like CVE-2021-30761 are published in these products:

Apple iOS
 

What versions of iOS are vulnerable to CVE-2021-30761?