{ "dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": { "cveId": "CVE-2023-1732", "assignerOrgId": "a22f1246-ba21-4bb4-a601-ad51614c1513", "state": "PUBLISHED", "assignerShortName": "cloudflare", "dateReserved": "2023-03-30T15:16:57.957Z", "datePublished": "2023-05-10T11:41:53.902Z", "dateUpdated": "2024-08-02T05:57:24.987Z" }, "containers": { "cna": { "affected": [ { "collectionURL": "https://github.com/cloudflare/circl", "defaultStatus": "unaffected", "platforms": [ "Go" ], "product": "CIRCL", "vendor": "Cloudflare", "versions": [ { "lessThan": "<1.3.3", "status": "affected", "version": "0", "versionType": "semver" } ] } ], "credits": [ { "lang": "en", "type": "finder", "user": "00000000-0000-4000-9000-000000000000", "value": "Tom Thorogood" } ], "descriptions": [ { "lang": "en", "supportingMedia": [ { "base64": false, "type": "text/html", "value": "

When sampling randomness for a shared secret, the implementation of Kyber and FrodoKEM, did not check whether crypto/rand.Read() returns an error. In rare deployment cases (error thrown by the Read() function), this could lead to a predictable shared secret.

The tkn20 and blindrsa components did not check whether enough randomness was returned from the user provided randomness source. Typically the user provides crypto/rand.Reader, which in the vast majority of cases will always return the right number random bytes. In the cases where it does not, or the user provides a source that does not, the blinding for blindrsa is weak and integrity of the plaintext is not ensured in tkn20.

" } ], "value": "When sampling randomness for a shared secret, the implementation of Kyber and FrodoKEM, did not check whether crypto/rand.Read() returns an error. In rare deployment cases (error thrown by the Read() function), this could lead to a predictable shared secret.\n\nThe tkn20 and blindrsa components did not check whether enough randomness was returned from the user provided randomness source. Typically the user provides crypto/rand.Reader, which in the vast majority of cases will always return the right number random bytes. In the cases where it does not, or the user provides a source that does not, the blinding for blindrsa is weak and integrity of the plaintext is not ensured in tkn20.\n\n" } ], "impacts": [ { "capecId": "CAPEC-620", "descriptions": [ { "lang": "en", "value": "CAPEC-620 Drop Encryption Level" } ] }, { "capecId": "CAPEC-20", "descriptions": [ { "lang": "en", "value": "CAPEC-20 Encryption Brute Forcing" } ] } ], "metrics": [ { "cvssV3_1": { "attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N", "version": "3.1" }, "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ] } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-20", "description": "CWE-20 Improper Input Validation", "lang": "en", "type": "CWE" } ] }, { "descriptions": [ { "cweId": "CWE-755", "description": "CWE-755 Improper Handling of Exceptional Conditions", "lang": "en", "type": "CWE" } ] } ], "providerMetadata": { "orgId": "a22f1246-ba21-4bb4-a601-ad51614c1513", "shortName": "cloudflare", "dateUpdated": "2023-05-10T11:41:53.902Z" }, "references": [ { "url": "https://github.com/cloudflare/circl/security/advisories/GHSA-2q89-485c-9j2x" } ], "source": { "discovery": "EXTERNAL" }, "title": "Improper random reading in CIRCL", "x_generator": { "engine": "Vulnogram 0.1.0-dev" } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T05:57:24.987Z" }, "title": "CVE Program Container", "references": [ { "url": "https://github.com/cloudflare/circl/security/advisories/GHSA-2q89-485c-9j2x", "tags": [ "x_transferred" ] } ] } ] } }