CVE-2021-29443
Published Apr 16, 2021
Last updated 4 years ago
Overview
- Description
- jose is an npm library providing a number of cryptographic operations. In vulnerable versions 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. 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). All major release versions have had a patch released which ensures the HMAC tag is verified before performing CBC decryption. The fixed versions are `^1.28.1 || ^2.0.5 || >=3.11.4`. Users should upgrade their v1.x dependency to ^1.28.1, their v2.x dependency to ^2.0.5, and their v3.x dependency to ^3.11.4. Thanks to Jason from Microsoft Vulnerability Research (MSVR) for bringing this up and Eva Sarafianou (@esarafianou) for helping to score this advisory.
- Source
- security-advisories@github.com
- NVD status
- Analyzed
Social media
- Hype score
- Not currently trending
Risk scores
CVSS 3.1
- Type
- Primary
- Base score
- 5.9
- Impact score
- 3.6
- Exploitability score
- 2.2
- Vector string
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- Severity
- MEDIUM
CVSS 2.0
- Type
- Primary
- Base score
- 4.3
- Impact score
- 2.9
- Exploitability score
- 8.6
- Vector string
- AV:N/AC:M/Au:N/C:P/I:N/A:N
Configurations
[
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:jose_project:jose:*:*:*:*:*:node.js:*:*",
"vulnerable": true,
"matchCriteriaId": "B93ABC92-DD84-439F-A9B2-848231CAB2AE",
"versionEndExcluding": "1.28.1",
"versionStartIncluding": "1.0.0"
},
{
"criteria": "cpe:2.3:a:jose_project:jose:*:*:*:*:*:node.js:*:*",
"vulnerable": true,
"matchCriteriaId": "6038A5A5-0704-44EF-BD09-BEBC67910809",
"versionEndExcluding": "2.0.5",
"versionStartIncluding": "2.0.0"
},
{
"criteria": "cpe:2.3:a:jose_project:jose:*:*:*:*:*:node.js:*:*",
"vulnerable": true,
"matchCriteriaId": "3DD35FAA-86A6-4D32-92F7-99342CC196C5",
"versionEndExcluding": "3.11.4",
"versionStartIncluding": "3.0.0"
}
],
"operator": "OR"
}
]
}
]