{"api_version":"1","generated_at":"2026-04-24T00:21:48+00:00","cve":"CVE-2023-1732","urls":{"html":"https://cve.report/CVE-2023-1732","api":"https://cve.report/api/cve/CVE-2023-1732.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2023-1732","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-1732"},"summary":{"title":"CVE-2023-1732","description":"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.","state":"PUBLIC","assigner":"cna@cloudflare.com","published_at":"2023-05-10 12:15:00","updated_at":"2023-05-17 17:04:00"},"problem_types":["CWE-755"],"metrics":[],"references":[{"url":"https://github.com/cloudflare/circl/security/advisories/GHSA-2q89-485c-9j2x","name":"https://github.com/cloudflare/circl/security/advisories/GHSA-2q89-485c-9j2x","refsource":"MISC","tags":[],"title":"Improper random reading in CIRCL · Advisory · cloudflare/circl · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-1732","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-1732","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2023","cve_id":"1732","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"cloudflare","cpe5":"circl","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"go","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"data_version":"4.0","data_type":"CVE","data_format":"MITRE","CVE_data_meta":{"ID":"CVE-2023-1732","ASSIGNER":"cna@cloudflare.com","STATE":"PUBLIC"},"description":{"description_data":[{"lang":"eng","value":"When sampling randomness for a shared secret, the implementation of Kyber and FrodoKEM, did not check whether crypto/rand.Read() returns an error. 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