CVE-2021-29444

Summary

CVE	CVE-2021-29444
State	PUBLIC
Assigner	[email protected]
Source Priority	CVE Program / NVD first with legacy fallback
Published	2021-04-16 22:15:00 UTC
Updated	2023-03-21 13:18:00 UTC
Description	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`.

Risk And Classification

Problem Types: CWE-203

NVD Known Affected Configurations (CPE 2.3)

Type	Vendor	Product	Version	Update	Edition	Language
Application	Jose-node-cjs-runtime Project	Jose-node-cjs-runtime	All	All	All	All
Application	Jose Project	Jose	All	All	All	All

References

Reference	Source	Link	Tags
Padding Oracle Attack due to Observable Timing Discrepancy in jose-browser-runtime · Advisory · panva/jose · GitHub	CONFIRM	github.com
jose-browser-runtime - npm	MISC	www.npmjs.com
CVE Program record	CVE.ORG	www.cve.org	canonical
NVD vulnerability detail	NVD	nvd.nist.gov	canonical, analysis

No vendor comments have been submitted for this CVE.

Legacy QID Mappings

982738 Nodejs (npm) Security Update for jose-browser-runtime (GHSA-94hh-pjjg-rwmr)