gsd-2023-1732
Vulnerability from gsd
Modified
2023-12-13 01:20
Details
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.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2023-1732",
"id": "GSD-2023-1732"
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
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],
"details": "When sampling randomness for a shared secret, the implementation of Kyber and FrodoKEM, did not check whether crypto/rand.Read()\u00a0returns an error. In rare deployment cases (error thrown by the Read()\u00a0function), 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": "GSD-2023-1732",
"modified": "2023-12-13T01:20:41.145599Z",
"schema_version": "1.4.0"
}
},
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"ASSIGNER": "cna@cloudflare.com",
"ID": "CVE-2023-1732",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "CIRCL",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_name": "0",
"version_value": "\u003c1.3.3"
}
]
}
}
]
},
"vendor_name": "Cloudflare"
}
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"credits": [
{
"lang": "en",
"value": "Tom Thorogood"
}
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"value": "When sampling randomness for a shared secret, the implementation of Kyber and FrodoKEM, did not check whether crypto/rand.Read()\u00a0returns an error. In rare deployment cases (error thrown by the Read()\u00a0function), 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"
}
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"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"
}
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"lang": "eng",
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"lang": "eng",
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"url": "https://github.com/cloudflare/circl/security/advisories/GHSA-2q89-485c-9j2x"
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"source": {
"discovery": "EXTERNAL"
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"advisories": [
{
"affected_range": "\u003cv1.3.3",
"affected_versions": "All versions before 1.3.3",
"cwe_ids": [
"CWE-1035",
"CWE-937"
],
"date": "2023-05-11",
"description": "When sampling randomness for a shared secret, the implementation of Kyber and FrodoKEM, does not check whether crypto/rand.Read()\u00a0returns an error. In rare deployment cases (error thrown by the Read()\u00a0function), this could lead to a predictable shared secret.\n\nThe tkn20 and blindrsa components does 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",
"fixed_versions": [
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],
"identifier": "CVE-2023-1732",
"identifiers": [
"GHSA-2q89-485c-9j2x",
"CVE-2023-1732"
],
"not_impacted": "All versions starting from 1.3.3",
"package_slug": "go/github.com/cloudflare/circl",
"pubdate": "2023-05-11",
"solution": "Upgrade to version 1.3.3 or above.",
"title": "Improper random reading in CIRCL",
"urls": [
"https://github.com/cloudflare/circl/security/advisories/GHSA-2q89-485c-9j2x",
"https://nvd.nist.gov/vuln/detail/CVE-2023-1732",
"https://github.com/cloudflare/circl/commit/ff8d91225f8954b4970b6d6382d2e4c78f4a4cf8",
"https://github.com/cloudflare/circl/releases/tag/v1.3.3",
"https://github.com/advisories/GHSA-2q89-485c-9j2x"
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"uuid": "bc58b045-60f2-4ddd-9faa-e389a6089651",
"versions": [
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"commit": {
"sha": "3bef500f2b925f150815a360b90081021e082939",
"tags": [
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"timestamp": "20230502104430"
},
"number": "v1.3.3"
}
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}
]
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"cpe_name": [],
"versionEndExcluding": "1.3.3",
"vulnerable": true
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"description": {
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"value": "When sampling randomness for a shared secret, the implementation of Kyber and FrodoKEM, did not check whether crypto/rand.Read()\u00a0returns an error. In rare deployment cases (error thrown by the Read()\u00a0function), 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"
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"name": "https://github.com/cloudflare/circl/security/advisories/GHSA-2q89-485c-9j2x",
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"url": "https://github.com/cloudflare/circl/security/advisories/GHSA-2q89-485c-9j2x"
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"impact": {
"baseMetricV3": {
"cvssV3": {
"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
}
},
"lastModifiedDate": "2023-05-17T17:04Z",
"publishedDate": "2023-05-10T12:15Z"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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