GHSA-rvcw-f68w-8h8h

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Source
https://github.com/advisories/GHSA-rvcw-f68w-8h8h
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/04/GHSA-rvcw-f68w-8h8h/GHSA-rvcw-f68w-8h8h.json
JSON Data
https://api.test.osv.dev/v1/vulns/GHSA-rvcw-f68w-8h8h
Aliases
Related
Published
2021-04-19T15:00:05Z
Modified
2023-11-01T04:55:05.012083Z
Severity
  • 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
Summary
Padding Oracle Attack due to Observable Timing Discrepancy in jose-node-cjs-runtime
Details

Impact

AESCBCHMAC_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.

Database specific 
{
    "nvd_published_at": "2021-04-16T22:15:00Z",
    "github_reviewed_at": "2021-04-16T22:57:33Z",
    "severity": "MODERATE",
    "github_reviewed": true,
    "cwe_ids": [
        "CWE-203",
        "CWE-208",
        "CWE-696"
    ]
}
References

Affected packages

npm / jose-node-cjs-runtime

Package

Name
jose-node-cjs-runtime
View open source insights on deps.dev
Purl
pkg:npm/jose-node-cjs-runtime

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.11.4