Affected versions of jose
are vulnerable to a Padding Oracle Attack due to Observable Timing Discrepancy.
AES_CBC_HMAC_SHA2 Algorithm (A128CBC-HS256, A192CBC-HS384, A256CBC-HS512) decryption would always execute both HMAC tag verification and CBC decryption, if either failed JWEDecryptionFailed
would be thrown. But a possibly observable difference in timing when padding error would occur while decrypting the ciphertext makes a padding oracle and an adversary might be able to make use of that oracle to decrypt data without knowing the decryption key by issuing on average 128*b calls to the padding oracle (where b is the number of bytes in the ciphertext block).
All major release versions have had a patch released which ensures the HMAC tag is verified before performing CBC decryption. The fixed versions are ^1.28.1 || ^2.0.5 || >=3.11.4
.
Users should upgrade their v1.x dependency to ^1.28.1
, their v2.x dependency to ^2.0.5
, and their v3.x dependency to ^3.11.4
CPE | Name | Operator | Version |
---|---|---|---|
jose | ge | 1.0.0 <1.28.1 || >=2.0.0 <2.0.5 || >= 3.0.0 < 3.11.4 |