CVE-2021-29443

Source
https://nvd.nist.gov/vuln/detail/CVE-2021-29443
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-29443.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-29443
Aliases
Related
Published
2021-04-16T18:15:13Z
Modified
2025-02-18T22:28:37Z
Severity
  • 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
Summary
[none]
Details

jose is an npm library providing a number of cryptographic operations. In vulnerable versions AESCBCHMAC_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. 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. Thanks to Jason from Microsoft Vulnerability Research (MSVR) for bringing this up and Eva Sarafianou (@esarafianou) for helping to score this advisory.

References

Affected packages

Git / github.com/panva/jose

Affected ranges

Type
GIT
Repo
https://github.com/panva/jose
Events