Vulnerability in Jose-Node-Cjs-Runtime Project
CVE-2021-29444
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`.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.011 (63.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 63.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.011 · change: -0.002
Affected products
- Jose-Node-Cjs-Runtime Project
- Panva Jose — versions < 3.11.4
Weakness classification (CWE)
References
- github.com/panva/jose/security/advisories/GHSA-94hh-pjjg-rwmr (Third Party Advisory)
- www.npmjs.com/package/jose-browser-runtime (Product, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-29444?
- CVE-2021-29444 is a medium-severity vulnerability in Jose-Node-Cjs-Runtime Project, classified under Observable Discrepancy. CVSS score: 5.9/10. Published 2021-04-16.
- How severe is CVE-2021-29444?
- Medium severity. CVSS v3 base score is 5.9 out of 10.