Apple OS Kernel OOB Write (CVE-2023-28206) Fixed in macOS 12.6.5, iOS 16.4.1
CVE-2023-28206 Published on April 10, 2023
An out-of-bounds write issue was addressed with improved input validation. This issue is fixed in macOS Monterey 12.6.5, iOS 16.4.1 and iPadOS 16.4.1, macOS Ventura 13.3.1, iOS 15.7.5 and iPadOS 15.7.5, macOS Big Sur 11.7.6. An app may be able to execute arbitrary code with kernel privileges. Apple is aware of a report that this issue may have been actively exploited.
Known Exploited Vulnerability
This Apple iOS, iPadOS, and macOS IOSurfaceAccelerator Out-of-Bounds Write Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Apple iOS, iPadOS, and macOS IOSurfaceAccelerator contain an out-of-bounds write vulnerability that allows an app to execute code with kernel privileges.
The following remediation steps are recommended / required by May 1, 2023: Apply updates per vendor instructions.
Vulnerability Analysis
CVE-2023-28206 is exploitable with local system 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-2023-28206 has been classified to as a Memory Corruption vulnerability or weakness.
Products Associated with CVE-2023-28206
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Affected Versions
Apple iOS and iPadOS:- Version unspecified and below 15.7 is affected.
- Version unspecified and below 11.7 is affected.
- Version unspecified and below 12.6 is affected.
- Version unspecified and below 13.3 is affected.
- Version unspecified and below 16.4 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.