Apple iOS/iPadOS Safari OOB read (<16.7.1) fixed 17.1.2
CVE-2023-42916 Published on November 30, 2023
An out-of-bounds read was addressed with improved input validation. 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 disclose sensitive information. 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 Out-of-Bounds Read Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Apple iOS, iPadOS, macOS, and Safari WebKit contain an out-of-bounds read vulnerability that may disclose sensitive information 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-2023-42916 is exploitable 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 have a high impact on confidentiality, with no impact on integrity and availability.
Weakness Type
Out-of-bounds Read
The software reads data past the end, or before the beginning, of the intended buffer. Typically, this can allow attackers to read sensitive information from other memory locations or cause a crash. A crash can occur when the code reads a variable amount of data and assumes that a sentinel exists to stop the read operation, such as a NUL in a string. The expected sentinel might not be located in the out-of-bounds memory, causing excessive data to be read, leading to a segmentation fault or a buffer overflow. 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 read operation then produces undefined or unexpected results.
Products Associated with CVE-2023-42916
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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.
- Before 17.1.2 is affected.
- Before 17.1.2 is affected.
- Version 14.0.0 and below 14.1.2 is affected.
- Before 17.1.2 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.