Code Exec via WebKit Mem Corrupt before iOS 16.7.1, fixed Safari 17.1.2
CVE-2023-42917 Published on November 30, 2023
A memory corruption vulnerability was addressed with improved locking. This issue is fixed in iOS 17.1.2 and iPadOS 17.1.2, macOS Sonoma 14.1.2, Safari 17.1.2. Processing web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been exploited against versions of iOS before iOS 16.7.1.
Known Exploited Vulnerability
This Apple Multiple Products WebKit Memory Corruption Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Apple iOS, iPadOS, macOS, and Safari WebKit contain a memory corruption vulnerability that leads to code execution when processing web content.
The following remediation steps are recommended / required by December 25, 2023: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Vulnerability Analysis
CVE-2023-42917 can be exploited with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. This vulnerability is known to be actively exploited by threat actors. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
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-2023-42917 has been classified to as a Memory Corruption vulnerability or weakness.
Products Associated with CVE-2023-42917
You can be notified by email with stack.watch whenever vulnerabilities like CVE-2023-42917 are published in these products:
Affected Versions
Apple Safari:- Version unspecified and below 17.1 is affected.
- Version unspecified and below 14.1 is affected.
- Version unspecified and below 17.1 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.