CVE-2021-29444 — MEDIUM (5.9)

Q: How severe is CVE-2021-29444?

CVE-2021-29444 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2021-29444?

Check the references section above for vendor advisories and patch information. Affected products include: Jose-Node-Cjs-Runtime Project Jose-Node-Cjs-Runtime.

Vulnerability 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`.

CVSS Score

5.9

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Jose-Node-Cjs-Runtime Project	Jose-Node-Cjs-Runtime	< 3.11.4

Related Weaknesses (CWE)

CWE-203

References

https://github.com/panva/jose/security/advisories/GHSA-94hh-pjjg-rwmrThird Party Advisory
https://www.npmjs.com/package/jose-browser-runtimeProductThird Party Advisory
https://github.com/panva/jose/security/advisories/GHSA-94hh-pjjg-rwmrThird Party Advisory
https://www.npmjs.com/package/jose-browser-runtimeProductThird Party Advisory

FAQ

What is CVE-2021-29444?

CVE-2021-29444 is a vulnerability with a CVSS score of 5.9 (MEDIUM). 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) dec...

How severe is CVE-2021-29444?

CVE-2021-29444 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-29444?

Check the references section above for vendor advisories and patch information. Affected products include: Jose-Node-Cjs-Runtime Project Jose-Node-Cjs-Runtime.