{"id":"CVE-2023-1732","aliases":["EUVD-2023-1452","GHSA-2q89-485c-9j2x","GO-2023-1765","openSUSE-SU-2025:14663-1"],"status":"published","title":"Improper random reading in CIRCL","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.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00386,"percentile":0.33127,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20","CWE-755"],"published":"2023-05-10T11:41:53Z","modified":"2026-10-28T02:31:02Z","fixes":[{"ecosystem":"Go","package":"github.com/cloudflare/circl","fixed_in":["1.3.3"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/cloudflare/circl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.3"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/cloudflare/circl","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.3.3"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/cloudflare/circl","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.3.3"}]}]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"velociraptor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.7.0.4.git142.862ef23-1.1"}]}],"bundled":27}],"products":[{"vendor":"cloudflare","product":"circl"}],"references":[{"url":"https://github.com/cloudflare/circl/security/advisories/GHSA-2q89-485c-9j2x","tags":["x_transferred","Vendor Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-1732","tags":["advisory"]},{"url":"https://github.com/cloudflare/circl/commit/ff8d91225f8954b4970b6d6382d2e4c78f4a4cf8","tags":["web","fix"]},{"url":"https://github.com/cloudflare/circl/releases/tag/v1.3.3","tags":["web"]},{"url":"https://github.com/advisories/GHSA-2q89-485c-9j2x"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/1xxx/CVE-2023-1732.json","tags":["advisory"]},{"url":"https://github.com/cloudflare/circl","tags":["package"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/IL7QOYRPFRGRS6UKU6ZYHI76FWFFUJNK/","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2023-1732","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2023-44270","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2023-45133","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2023-45683","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2023-46234","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2024-21538","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2024-23331","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2024-24786","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2024-28180","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2024-31207","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2024-37298","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2024-4067","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2024-4068","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2024-42459","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2024-42460","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2024-42461","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2024-45296","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2024-45338","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2024-45811","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2024-45812","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2024-47068","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2024-47875","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2024-48948","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2024-48949","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2024-51744","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2024-55565","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2024-6104","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2023-1732","title":"Improper random reading in CIRCL","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.\n\n","status":"published","published":"2023-05-10T11:41:53.902Z","modified":"2025-01-27T18:32:25.797Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-20","CWE-755"],"updated_at":"2026-11-02T14:35:32.019713Z"}],"euvd":[{"id":"EUVD-2023-1452","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.\n\n","status":"published","published":"2023-05-10T11:41:53Z","modified":"2025-01-27T18:32:25Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N","level":"medium"}],"updated_at":"2026-11-03T00:04:12.238707Z"}],"ghsa":[{"id":"GHSA-2q89-485c-9j2x","title":"Improper random reading in CIRCL","description":"### Impact\nWhen 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\n### Patches\nThe fix was introduced in CIRCL v. 1.3.3\n","status":"published","published":"2023-05-11T20:40:54Z","modified":"2023-11-06T05:06:21Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N","level":"medium"}],"cwes":["CWE-20","CWE-755"],"updated_at":"2026-11-02T14:37:15.055009Z"}],"nvd":[{"id":"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.\n\n","status":"published","published":"2023-05-10T12:15:10.523Z","modified":"2026-06-17T05:28:38.17Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N","level":"high","assessor":"primary"}],"cwes":["CWE-20","CWE-755"],"updated_at":"2026-11-02T14:08:01.131774Z"}],"osv":[{"id":"CVE-2023-1732","title":"Improper random reading in CIRCL","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.\n\n","status":"published","published":"2023-05-10T11:41:53.902Z","modified":"2026-10-28T02:31:02.723197305Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N","level":"medium"}],"cwes":["CWE-20","CWE-755"],"updated_at":"2026-11-02T15:44:30.334753Z"},{"id":"GHSA-2q89-485c-9j2x","title":"Improper random reading in CIRCL","description":"### Impact\nWhen 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\n### Patches\nThe fix was introduced in CIRCL v. 1.3.3\n","status":"published","published":"2023-05-11T20:40:54Z","modified":"2026-09-10T03:49:54.418293155Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N","level":"medium"}],"cwes":["CWE-20","CWE-755"],"updated_at":"2026-11-02T15:46:34.700741Z"},{"id":"GO-2023-1765","title":"Leaked shared secret and weak blinding in github.com/cloudflare/circl","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.","status":"published","published":"2023-05-24T15:32:51Z","modified":"2026-02-04T02:22:58.839282Z","updated_at":"2026-11-02T15:47:01.185262Z"},{"id":"openSUSE-SU-2025:14663-1","title":"velociraptor-0.7.0.4.git142.862ef23-1.1 on GA media","description":"These are all security issues fixed in the velociraptor-0.7.0.4.git142.862ef23-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2025-01-17T00:00:00Z","modified":"2026-02-04T03:47:20.18775Z","updated_at":"2026-11-02T16:58:36.976155Z"}]}}