CVE-2023-42811

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CVE-2023-42811

Summary: AEADs/aes-gcm: Plaintext exposed in decrypt_in_place_detached even on tag verification failure

Details: aes-gcm is a pure Rust implementation of the AES-GCM. Starting in version 0.10.0 and prior to version 0.10.3, in the AES GCM implementation of decrypt_in_place_detached, the decrypted ciphertext (i.e. the correct plaintext) is exposed even if tag verification fails. If a program using the `aes-gcm` crate's `decrypt_in_place*` APIs accesses the buffer after decryption failure, it will contain a decryption of an unauthenticated input. Depending on the specific nature of the program this may enable Chosen Ciphertext Attacks (CCAs) which can cause a catastrophic breakage of the cipher including full plaintext recovery. Version 0.10.3 contains a fix for this issue.

References: https://docs.rs/aes-gcm/latest/src/aes_gcm/lib.rs.html#309, https://lists.fedoraproject.org/archives/list/[email protected]/message/ROBB6TBDAGEQ2WIINR34F3DPSN3FND6K/, https://lists.fedoraproject.org/archives/list/[email protected]/message/RYQCICN6BVC6I75O3F6W4VK4J3MOYDJU/, https://lists.fedoraproject.org/archives/list/[email protected]/message/U67ZSMNX5V3WTBYPUYF45PSFG4SF5SGF/, https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/42xxx/CVE-2023-42811.json, https://github.com/RustCrypto/AEADs/security/advisories/GHSA-423w-p2w9-r7vq, https://nvd.nist.gov/vuln/detail/CVE-2023-42811