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vuln-cve/data/2021/40xxx/CVE-2021-40528.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"cveMetadata": {
"state": "PUBLISHED",
"cveId": "CVE-2021-40528",
"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"assignerShortName": "mitre",
"dateUpdated": "2025-06-09T15:13:03.906Z",
"dateReserved": "2021-09-06T00:00:00.000Z",
"datePublished": "2021-09-06T00:00:00.000Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"shortName": "mitre",
"dateUpdated": "2022-10-31T00:00:00.000Z"
},
"descriptions": [
{
"lang": "en",
"value": "The ElGamal implementation in Libgcrypt before 1.9.4 allows plaintext recovery because, during interaction between two cryptographic libraries, a certain dangerous combination of the prime defined by the receiver's public key, the generator defined by the receiver's public key, and the sender's ephemeral exponents can lead to a cross-configuration attack against OpenPGP."
}
],
"affected": [
{
"vendor": "n/a",
"product": "n/a",
"versions": [
{
"version": "n/a",
"status": "affected"
}
]
}
],
"references": [
{
"url": "https://eprint.iacr.org/2021/923"
},
{
"url": "https://ibm.github.io/system-security-research-updates/2021/07/20/insecurity-elgamal-pt1"
},
{
"url": "https://ibm.github.io/system-security-research-updates/2021/09/06/insecurity-elgamal-pt2"
},
{
"url": "https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=3462280f2e23e16adf3ed5176e0f2413d8861320"
},
{
"name": "GLSA-202210-13",
"tags": [
"vendor-advisory"
],
"url": "https://security.gentoo.org/glsa/202210-13"
}
],
"problemTypes": [
{
"descriptions": [
{
"type": "text",
"lang": "en",
"description": "n/a"
}
]
}
]
},
"adp": [
{
"providerMetadata": {
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE",
"dateUpdated": "2024-08-04T02:44:10.845Z"
},
"title": "CVE Program Container",
"references": [
{
"url": "https://eprint.iacr.org/2021/923",
"tags": [
"x_transferred"
]
},
{
"url": "https://ibm.github.io/system-security-research-updates/2021/07/20/insecurity-elgamal-pt1",
"tags": [
"x_transferred"
]
},
{
"url": "https://ibm.github.io/system-security-research-updates/2021/09/06/insecurity-elgamal-pt2",
"tags": [
"x_transferred"
]
},
{
"url": "https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=3462280f2e23e16adf3ed5176e0f2413d8861320",
"tags": [
"x_transferred"
]
},
{
"name": "GLSA-202210-13",
"tags": [
"vendor-advisory",
"x_transferred"
],
"url": "https://security.gentoo.org/glsa/202210-13"
}
]
},
{
"problemTypes": [
{
"descriptions": [
{
"type": "CWE",
"cweId": "CWE-327",
"lang": "en",
"description": "CWE-327 Use of a Broken or Risky Cryptographic Algorithm"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 5.9,
"attackVector": "NETWORK",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "HIGH",
"availabilityImpact": "NONE",
"privilegesRequired": "NONE",
"confidentialityImpact": "HIGH"
}
},
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2025-06-09T15:12:20.359985Z",
"id": "CVE-2021-40528",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2025-06-09T15:13:03.906Z"
}
}
]
}
}