GSD-2021-29445
Vulnerability from gsd - Updated: 2023-12-13 01:23Details
jose-node-esm-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`.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2021-29445",
"description": "jose-node-esm-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 `\u003e=3.11.4`. Users should upgrade to `^3.11.4`.",
"id": "GSD-2021-29445"
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"aliases": [
"CVE-2021-29445"
],
"details": "jose-node-esm-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 `\u003e=3.11.4`. Users should upgrade to `^3.11.4`.",
"id": "GSD-2021-29445",
"modified": "2023-12-13T01:23:36.968407Z",
"schema_version": "1.4.0"
}
},
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"ID": "CVE-2021-29445",
"STATE": "PUBLIC",
"TITLE": "Padding Oracle Attack due to Observable Timing Discrepancy in jose-node-esm-runtime"
},
"affects": {
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"version": {
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"value": "jose-node-esm-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 `\u003e=3.11.4`. Users should upgrade to `^3.11.4`."
}
]
},
"impact": {
"cvss": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
}
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"value": "{\"CWE-203\":\"Observable Discrepancy\"}"
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"url": "https://github.com/panva/jose/security/advisories/GHSA-4v4g-726h-xvfv"
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{
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"refsource": "MISC",
"url": "https://www.npmjs.com/package/jose-node-esm-runtime"
}
]
},
"source": {
"advisory": "GHSA-4v4g-726h-xvfv",
"discovery": "UNKNOWN"
}
},
"gitlab.com": {
"advisories": [
{
"affected_range": "\u003c3.11.4",
"affected_versions": "All versions before 3.11.4",
"cvss_v2": "AV:N/AC:M/Au:N/C:P/I:N/A:N",
"cvss_v3": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"cwe_ids": [
"CWE-1035",
"CWE-203",
"CWE-937"
],
"date": "2021-04-19",
"description": "jose-node-esm-runtime is an npm package which provides a number of cryptographic functions.Users should upgrade to `^3.11.4`.",
"fixed_versions": [
"3.11.4"
],
"identifier": "CVE-2021-29445",
"identifiers": [
"GHSA-4v4g-726h-xvfv",
"CVE-2021-29445"
],
"not_impacted": "All versions starting from 3.11.4",
"package_slug": "npm/jose-node-esm-runtime",
"pubdate": "2021-04-19",
"solution": "Upgrade to version 3.11.4 or above.",
"title": "Observable Discrepancy",
"urls": [
"https://github.com/panva/jose/security/advisories/GHSA-4v4g-726h-xvfv",
"https://www.npmjs.com/package/jose-node-esm-runtime",
"https://nvd.nist.gov/vuln/detail/CVE-2021-29445",
"https://github.com/advisories/GHSA-4v4g-726h-xvfv"
],
"uuid": "b7e101f3-87fb-4224-abbb-bb346f0db7b6"
},
{
"affected_range": "\u003c3.11.4",
"affected_versions": "All versions before 3.11.4",
"cvss_v2": "AV:N/AC:M/Au:N/C:P/I:N/A:N",
"cvss_v3": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"cwe_ids": [
"CWE-1035",
"CWE-203",
"CWE-937"
],
"date": "2021-04-23",
"description": "jose-node-esm-runtime is an npm package which provides a number of cryptographic functions.",
"fixed_versions": [
"3.11.4"
],
"identifier": "CVE-2021-29445",
"identifiers": [
"CVE-2021-29445",
"GHSA-4v4g-726h-xvfv"
],
"not_impacted": "All versions starting from 3.11.4",
"package_slug": "npm/jose",
"pubdate": "2021-04-16",
"solution": "Upgrade to version 3.11.4 or above.",
"title": "Information Exposure Through Discrepancy",
"urls": [
"https://nvd.nist.gov/vuln/detail/CVE-2021-29445"
],
"uuid": "939d8eca-eebf-4ed5-98c3-779bf896b260"
}
]
},
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"cpe_name": [],
"versionEndExcluding": "3.11.4",
"vulnerable": true
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"value": "jose-node-esm-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 `\u003e=3.11.4`. Users should upgrade to `^3.11.4`."
}
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"impact": {
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"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 4.3,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N",
"version": "2.0"
},
"exploitabilityScore": 8.6,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"severity": "MEDIUM",
"userInteractionRequired": false
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"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
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"exploitabilityScore": 2.2,
"impactScore": 3.6
}
},
"lastModifiedDate": "2023-03-21T13:19Z",
"publishedDate": "2021-04-16T22:15Z"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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