CVE-2021-29443
CVE-2021-29443 · Padding Oracle Attack due to Observable Timing Discrepancy in jose
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jose is an npm library providing a number of cryptographic operations. In vulnerable versions 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. 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.
CVSS 5.9 · Mittel · EPSS 1,2% · Korrektur verfügbar
- Veröffentlicht
- Aktualisiert
Technologie-Stack: node
Betroffene Produkte und Versionen
jose
- Softwareversionen
- < 1.28.1: Betroffen
- >= 2.0.0, < 2.0.5: Betroffen
- >= 3.0.0, < 3.11.4: Betroffen
Keine Korrektur veröffentlicht
jose npm
- Betroffene Versionsbereiche
- SEMVER: ≥ 1.0.0, < 1.28.1
Auf 1.28.1 aktualisieren
jose npm
- Betroffene Versionsbereiche
- SEMVER: ≥ 2.0.0, < 2.0.5
Auf 2.0.5 aktualisieren
jose npm
- Betroffene Versionsbereiche
- SEMVER: ≥ 3.0.0, < 3.11.4
Auf 3.11.4 aktualisieren