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.
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{ "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro", "ubuntu_priority": "low", "binaries": [ { "binary_version": "3.0.2-0ubuntu1.10+Fips1", "binary_name": "libssl-dev" }, { "binary_version": "3.0.2-0ubuntu1.10+Fips1", "binary_name": "libssl-doc" }, { "binary_version": "3.0.2-0ubuntu1.10+Fips1", "binary_name": "libssl3" }, { "binary_version": "3.0.2-0ubuntu1.10+Fips1", "binary_name": "libssl3-dbgsym" }, { "binary_version": "3.0.2-0ubuntu1.10+Fips1", "binary_name": "openssl" }, { "binary_version": "3.0.2-0ubuntu1.10+Fips1", "binary_name": "openssl-dbgsym" } ] }