Vulnerabilites related to Cloudflare - CIRCL
Vulnerability from fkie_nvd
Published
2023-05-10 12:15
Modified
2024-11-21 07:39
Severity ?
5.3 (Medium) - CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N
8.2 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
8.2 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
Summary
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.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| cloudflare | circl | * |
{ configurations: [ { nodes: [ { cpeMatch: [ { criteria: "cpe:2.3:a:cloudflare:circl:*:*:*:*:*:go:*:*", matchCriteriaId: "39A6B412-BB17-403E-B83A-FCFAD155C1B9", versionEndExcluding: "1.3.3", vulnerable: true, }, ], negate: false, operator: "OR", }, ], }, ], cveTags: [], descriptions: [ { lang: "en", 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", }, ], id: "CVE-2023-1732", lastModified: "2024-11-21T07:39:47.283", metrics: { cvssMetricV31: [ { cvssData: { 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", }, exploitabilityScore: 1, impactScore: 4.2, source: "cna@cloudflare.com", type: "Secondary", }, { cvssData: { attackComplexity: "LOW", attackVector: "NETWORK", availabilityImpact: "NONE", baseScore: 8.2, baseSeverity: "HIGH", confidentialityImpact: "LOW", integrityImpact: "HIGH", privilegesRequired: "NONE", scope: "UNCHANGED", userInteraction: "NONE", vectorString: "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N", version: "3.1", }, exploitabilityScore: 3.9, impactScore: 4.2, source: "nvd@nist.gov", type: "Primary", }, ], }, published: "2023-05-10T12:15:10.523", references: [ { source: "cna@cloudflare.com", tags: [ "Vendor Advisory", ], url: "https://github.com/cloudflare/circl/security/advisories/GHSA-2q89-485c-9j2x", }, { source: "af854a3a-2127-422b-91ae-364da2661108", tags: [ "Vendor Advisory", ], url: "https://github.com/cloudflare/circl/security/advisories/GHSA-2q89-485c-9j2x", }, ], sourceIdentifier: "cna@cloudflare.com", vulnStatus: "Modified", weaknesses: [ { description: [ { lang: "en", value: "CWE-20", }, { lang: "en", value: "CWE-755", }, ], source: "cna@cloudflare.com", type: "Secondary", }, { description: [ { lang: "en", value: "CWE-755", }, ], source: "nvd@nist.gov", type: "Primary", }, ], }
cve-2023-1732
Vulnerability from cvelistv5
Published
2023-05-10 11:41
Modified
2025-01-27 18:32
Severity ?
EPSS score ?
Summary
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.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Cloudflare | CIRCL |
Version: 0 ≤ |
{ containers: { adp: [ { providerMetadata: { dateUpdated: "2024-08-02T05:57:24.987Z", orgId: "af854a3a-2127-422b-91ae-364da2661108", shortName: "CVE", }, references: [ { tags: [ "x_transferred", ], url: "https://github.com/cloudflare/circl/security/advisories/GHSA-2q89-485c-9j2x", }, ], title: "CVE Program Container", }, { metrics: [ { other: { content: { id: "CVE-2023-1732", options: [ { Exploitation: "none", }, { Automatable: "no", }, { "Technical Impact": "partial", }, ], role: "CISA Coordinator", timestamp: "2025-01-27T18:32:18.233703Z", version: "2.0.3", }, type: "ssvc", }, }, ], providerMetadata: { dateUpdated: "2025-01-27T18:32:25.797Z", orgId: "134c704f-9b21-4f2e-91b3-4a467353bcc0", shortName: "CISA-ADP", }, title: "CISA ADP Vulnrichment", }, ], 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: "<p>When sampling randomness for a shared secret, the implementation of Kyber and FrodoKEM, did not check whether <code>crypto/rand.Read()</code> returns an error. In rare deployment cases (error thrown by the <code>Read()</code> function), this could lead to a predictable shared secret.</p><p>The tkn20 and blindrsa components did not check whether enough randomness was returned from the user provided randomness source. Typically the user provides <code>crypto/rand.Reader</code>, 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.</p>", }, ], 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: { dateUpdated: "2023-05-10T11:41:53.902Z", orgId: "a22f1246-ba21-4bb4-a601-ad51614c1513", shortName: "cloudflare", }, 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", }, }, }, cveMetadata: { assignerOrgId: "a22f1246-ba21-4bb4-a601-ad51614c1513", assignerShortName: "cloudflare", cveId: "CVE-2023-1732", datePublished: "2023-05-10T11:41:53.902Z", dateReserved: "2023-03-30T15:16:57.957Z", dateUpdated: "2025-01-27T18:32:25.797Z", state: "PUBLISHED", }, dataType: "CVE_RECORD", dataVersion: "5.1", }