CVE-2023-28204 vulnerability in Apple Products
Published on June 23, 2023

An out-of-bounds read was addressed with improved input validation. This issue is fixed in watchOS 9.5, tvOS 16.5, macOS Ventura 13.4, iOS 15.7.6 and iPadOS 15.7.6, Safari 16.5, iOS 16.5 and iPadOS 16.5. Processing web content may disclose sensitive information. Apple is aware of a report that this issue may have been actively exploited.

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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, tvOS, watchOS, and Safari WebKit contain an out-of-bounds read vulnerability that may disclose sensitive information.

The following remediation steps are recommended / required by June 12, 2023: Apply updates per vendor instructions.

Vulnerability Analysis

CVE-2023-28204 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 have a high impact on confidentiality, with no impact on integrity and availability.

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-2023-28204

You can be notified by stack.watch whenever vulnerabilities like CVE-2023-28204 are published in these products:

Apple Macos

Apple Watch OS

Apple TV OS

Apple iPad OS

Apple iOS

Apple Safari

What versions are vulnerable to CVE-2023-28204?