{"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"}}]}}