github - ghsa-2q89-485c-9j2x

GHSA-2Q89-485C-9J2X

Vulnerability from github – Published: 2023-05-11 20:40 – Updated: 2023-05-24 18:31

Summary

Improper random reading in CIRCL

Details

Impact

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.

Patches

The fix was introduced in CIRCL v. 1.3.3

Severity ?

5.3 (Medium)


                  
                    CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N

Show details on source website

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/cloudflare/circl"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-1732"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20",
      "CWE-755"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-05-11T20:40:54Z",
    "nvd_published_at": "2023-05-10T12:15:10Z",
    "severity": "MODERATE"
  },
  "details": "### 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",
  "id": "GHSA-2q89-485c-9j2x",
  "modified": "2023-05-24T18:31:42Z",
  "published": "2023-05-11T20:40:54Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/cloudflare/circl/security/advisories/GHSA-2q89-485c-9j2x"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-1732"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cloudflare/circl/commit/ff8d91225f8954b4970b6d6382d2e4c78f4a4cf8"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/cloudflare/circl"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cloudflare/circl/releases/tag/v1.3.3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Improper random reading in CIRCL"
}

CVE-2023-1732 (GCVE-0-2023-1732)

Vulnerability from cvelistv5 – Published: 2023-05-10 11:41 – Updated: 2025-01-27 18:32

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.

Severity ?

5.3 (Medium)


                        
                          CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N

CWE

CWE-20 - Improper Input Validation
CWE-755 - Improper Handling of Exceptional Conditions

Assigner

cloudflare

References

URL

Tags

https://github.com/cloudflare/circl/security/advi…

Impacted products

	Vendor	Product	Version
	Cloudflare	CIRCL	Affected: 0 , < <1.3.3 (semver)

Credits

Tom Thorogood

Show details on NVD website

JSON

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            "url": "https://github.com/cloudflare/circl/security/advisories/GHSA-2q89-485c-9j2x"
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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

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