Bshyuunn

Name of the Vulnerable Software and Affected Versions: visionOS versions prior to 2.3 iOS versions prior to 18.3 iPadOS versions prior to 18.3 iPadOS versions prior to 17.7.4 macOS Sequoia versions prior to 15.3 watchOS versions prior to 11.3 tvOS versions prior to 18.3 Description: The issue was addressed with improved memory handling. An app may be able to cause unexpected system termination. Recommendations: For visionOS versions prior to 2.3, update to visionOS 2.3. For iOS versions prior to 18.3, update to iOS 18.3. For iPadOS versions prior to 18.3, update to iPadOS 18.3. For iPadOS versions prior to 17.7.4, update to iPadOS 17.7.4. For macOS Sequoia versions prior to 15.3, update to macOS Sequoia 15.3. For watchOS versions prior to 11.3, update to watchOS 11.3. For tvOS versions prior to 18.3, update to tvOS 18.3.

The issue concerns a denial of service (DOS) vulnerability in the TTF parser of the PDFio library. Maliciously crafted TTF files can cause the program to utilize 100% of the memory and enter an infinite loop, potentially leading to a heap-buffer-overflow vulnerability. This occurs due to the `nGroups` value extracted from the file, which, when altered, can cause the program to consume excessive memory and enter an infinite loop. The `read camp` function is specifically affected by this issue. Automated systems, including web servers using this library to convert PDF submissions into plaintext, are vulnerable to DOS attacks if an attacker uploads a malicious TTF file.