UBUNTU-CVE-2023-1255

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UBUNTU-CVE-2023-1255

Summary:

Details: Issue summary: The AES-XTS cipher decryption implementation for 64 bit ARM platform contains a bug that could cause it to read past the input buffer, leading to a crash. Impact summary: Applications that use the AES-XTS algorithm on the 64 bit ARM platform can crash in rare circumstances. The AES-XTS algorithm is usually used for disk encryption. The AES-XTS cipher decryption implementation for 64 bit ARM platform will read past the end of the ciphertext buffer if the ciphertext size is 4 mod 5 in 16 byte blocks, e.g. 144 bytes or 1024 bytes. If the memory after the ciphertext buffer is unmapped, this will trigger a crash which results in a denial of service. If an attacker can control the size and location of the ciphertext buffer being decrypted by an application using AES-XTS on 64 bit ARM, the application is affected. This is fairly unlikely making this issue a Low severity one.

References: https://ubuntu.com/security/CVE-2023-1255, https://www.openssl.org/news/secadv/20230420.txt, https://ubuntu.com/security/notices/USN-6119-1, https://www.cve.org/CVERecord?id=CVE-2023-1255