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Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTk0aGgtcGpqZy1yd21y

Padding Oracle Attack due to Observable Timing Discrepancy in jose-browser-runtime

Impact

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).

Patches

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.

Credits

Thanks to Morgan Brown of Microsoft for bringing this up and Eva Sarafianou (@esarafianou) for helping to score this advisory.

Permalink: https://github.com/advisories/GHSA-94hh-pjjg-rwmr
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTk0aGgtcGpqZy1yd21y
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: over 3 years ago
Updated: over 1 year ago


CVSS Score: 5.9
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Identifiers: GHSA-94hh-pjjg-rwmr, CVE-2021-29444
References: Repository: https://github.com/panva/jose
Blast Radius: 5.9

Affected Packages

npm:jose-browser-runtime
Dependent packages: 6
Dependent repositories: 10
Downloads: 22,678 last month
Affected Version Ranges: < 3.11.4
Fixed in: 3.11.4
All affected versions: 3.8.0, 3.9.0, 3.10.0, 3.11.0, 3.11.1, 3.11.2, 3.11.3
All unaffected versions: 3.11.4, 3.11.5, 3.11.6, 3.12.0, 3.12.1, 3.12.2, 3.12.3, 3.13.0, 3.14.0, 3.14.1, 3.14.2, 3.14.3, 3.14.4, 3.15.0, 3.15.1, 3.15.2, 3.15.3, 3.15.4, 3.15.5, 3.16.0, 3.16.1, 3.17.0, 3.18.0, 3.19.0, 3.20.0, 3.20.1, 3.20.2, 3.20.3, 3.20.4, 4.0.0, 4.0.1, 4.0.2, 4.0.3, 4.0.4, 4.1.0, 4.1.1, 4.1.2, 4.1.3, 4.1.4, 4.1.5, 4.2.0, 4.2.1, 4.3.0, 4.3.2, 4.3.3, 4.3.4, 4.3.5, 4.3.6, 4.3.7, 4.3.8, 4.3.9, 4.4.0, 4.5.0, 4.5.1, 4.5.2, 4.5.3, 4.6.0, 4.6.1, 4.6.2, 4.7.0, 4.8.0, 4.8.1, 4.8.3, 4.9.0, 4.9.1, 4.9.2, 4.9.3, 4.10.0, 4.10.1, 4.10.2, 4.10.3, 4.10.4, 4.11.0, 4.11.1, 4.11.2, 4.11.3, 4.11.4, 4.12.0, 4.12.1, 4.12.2, 4.13.0, 4.13.1, 4.13.2, 4.14.0, 4.14.1, 4.14.2, 4.14.3, 4.14.4, 4.14.5, 4.14.6, 4.15.0, 4.15.1, 4.15.2, 4.15.3, 4.15.4, 4.15.5, 5.0.0, 5.0.1, 5.0.2, 5.1.0, 5.1.1, 5.1.2, 5.1.3, 5.2.0, 5.2.1, 5.2.2, 5.2.3, 5.2.4, 5.3.0, 5.4.0, 5.4.1, 5.5.0, 5.6.0, 5.6.1, 5.6.2, 5.6.3, 5.7.0, 5.8.0, 5.9.0, 5.9.1, 5.9.2, 5.9.3, 5.9.4, 5.9.5, 5.9.6