Vulnerability-Lookup

Vulnerability from bitnami_vulndb

Published

2024-03-06 10:52

Modified

2026-09-08 08:34

Summary

Before Go 1.20, the RSA based key exchange methods in crypto/tls may exhibit a timing side channel

Details

Before Go 1.20, the RSA based TLS key exchanges used the math/big library, which is not constant time. RSA blinding was applied to prevent timing attacks, but analysis shows this may not have been fully effective. In particular it appears as if the removal of PKCS#1 padding may leak timing information, which in turn could be used to recover session key bits. In Go 1.20, the crypto/tls library switched to a fully constant time RSA implementation, which we do not believe exhibits any timing side channels.

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "golang",
        "purl": "pkg:bitnami/golang"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.20.0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-45287"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*"
    ],
    "severity": "High"
  },
  "details": "Before Go 1.20, the RSA based TLS key exchanges used the math/big library, which is not constant time. RSA blinding was applied to prevent timing attacks, but analysis shows this may not have been fully effective. In particular it appears as if the removal of PKCS#1 padding may leak timing information, which in turn could be used to recover session key bits. In Go 1.20, the crypto/tls library switched to a fully constant time RSA implementation, which we do not believe exhibits any timing side channels.",
  "id": "BIT-golang-2023-45287",
  "modified": "2026-09-08T08:34:36.952Z",
  "published": "2024-03-06T10:52:27.963Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://go.dev/cl/326012/26"
    },
    {
      "type": "REPORT",
      "url": "https://go.dev/issue/20654"
    },
    {
      "type": "DISCUSSION",
      "url": "https://groups.google.com/g/golang-announce/c/QMK8IQALDvA"
    },
    {
      "type": "ADVISORY",
      "url": "https://people.redhat.com/~hkario/marvin/"
    },
    {
      "type": "ADVISORY",
      "url": "https://pkg.go.dev/vuln/GO-2023-2375"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20240112-0005/"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-45287"
    }
  ],
  "schema_version": "1.5.0",
  "summary": "Before Go 1.20, the RSA based key exchange methods in crypto/tls may exhibit a timing side channel"
}

CVE-2023-45287 (GCVE-0-2023-45287)

Vulnerability from cvelistv5 – Published: 2023-12-05 16:18 – Updated: 2025-02-13 17:14

Title

Before Go 1.20, the RSA based key exchange methods in crypto/tls may exhibit a timing side channel

Summary

Severity

No CVSS data available.

CWE

CWE-208 - Observable Timing Discrepancy

Assigner

Go Google root

References

6 references

URL	Tags
https://go.dev/issue/20654
https://go.dev/cl/326012/26
https://groups.google.com/g/golang-announce/c/QMK…
https://people.redhat.com/~hkario/marvin/
https://pkg.go.dev/vuln/GO-2023-2375
https://security.netapp.com/advisory/ntap-2024011…

Impacted products

1 product

Vendor	Product	Version
Go standard library	crypto/tls	Affected: 0 , < 1.20.0 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T20:21:15.309Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://go.dev/issue/20654"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://go.dev/cl/326012/26"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://groups.google.com/g/golang-announce/c/QMK8IQALDvA"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://people.redhat.com/~hkario/marvin/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://pkg.go.dev/vuln/GO-2023-2375"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20240112-0005/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "crypto/tls",
          "product": "crypto/tls",
          "programRoutines": [
            {
              "name": "rsaKeyAgreement.processClientKeyExchange"
            },
            {
              "name": "rsaKeyAgreement.generateClientKeyExchange"
            },
            {
              "name": "Conn.Handshake"
            },
            {
              "name": "Conn.HandshakeContext"
            },
            {
              "name": "Conn.Read"
            },
            {
              "name": "Conn.Write"
            },
            {
              "name": "Dial"
            },
            {
              "name": "DialWithDialer"
            },
            {
              "name": "Dialer.Dial"
            },
            {
              "name": "Dialer.DialContext"
            }
          ],
          "vendor": "Go standard library",
          "versions": [
            {
              "lessThan": "1.20.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Before Go 1.20, the RSA based TLS key exchanges used the math/big library, which is not constant time. RSA blinding was applied to prevent timing attacks, but analysis shows this may not have been fully effective. In particular it appears as if the removal of PKCS#1 padding may leak timing information, which in turn could be used to recover session key bits. In Go 1.20, the crypto/tls library switched to a fully constant time RSA implementation, which we do not believe exhibits any timing side channels."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-208: Observable Timing Discrepancy",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-01-12T14:06:27.569Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/issue/20654"
        },
        {
          "url": "https://go.dev/cl/326012/26"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/QMK8IQALDvA"
        },
        {
          "url": "https://people.redhat.com/~hkario/marvin/"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2023-2375"
        },
        {
          "url": "https://security.netapp.com/advisory/ntap-20240112-0005/"
        }
      ],
      "title": "Before Go 1.20, the RSA based key exchange methods in crypto/tls may exhibit a timing side channel"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2023-45287",
    "datePublished": "2023-12-05T16:18:06.104Z",
    "dateReserved": "2023-10-06T17:06:26.221Z",
    "dateUpdated": "2025-02-13T17:14:00.588Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.