CVE-2021-29444 (GCVE-0-2021-29444)

Vulnerability from cvelistv5 – Published: 2021-04-16 21:45 – Updated: 2024-08-03 22:02
VLAI
Title
Padding Oracle Attack due to Observable Timing Discrepancy in jose-browser-runtime
Summary
jose-browser-runtime is an npm package which provides a number of cryptographic functions. In versions prior to 3.11.4 the 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). A patch was released which ensures the HMAC tag is verified before performing CBC decryption. The fixed versions are `>=3.11.4`. Users should upgrade to `^3.11.4`.
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE
  • CWE-203 - {"CWE-203":"Observable Discrepancy"}
Assigner
References
Impacted products
Vendor Product Version
panva jose Affected: < 3.11.4
Create a notification for this product.
Show details on NVD website
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