Vulnerability-Lookup

GHSA-XC82-5M89-G4JV

Vulnerability from github – Published: 2023-08-02 21:30 – Updated: 2023-11-25 12:30

Details

Extremely large RSA keys in certificate chains can cause a client/server to expend significant CPU time verifying signatures. With fix, the size of RSA keys transmitted during handshakes is restricted to <= 8192 bits. Based on a survey of publicly trusted RSA keys, there are currently only three certificates in circulation with keys larger than this, and all three appear to be test certificates that are not actively deployed. It is possible there are larger keys in use in private PKIs, but we target the web PKI, so causing breakage here in the interests of increasing the default safety of users of crypto/tls seems reasonable.

Severity

5.3 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2023-29409"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-08-02T20:15:11Z",
    "severity": "MODERATE"
  },
  "details": "Extremely large RSA keys in certificate chains can cause a client/server to expend significant CPU time verifying signatures. With fix, the size of RSA keys transmitted during handshakes is restricted to \u003c= 8192 bits. Based on a survey of publicly trusted RSA keys, there are currently only three certificates in circulation with keys larger than this, and all three appear to be test certificates that are not actively deployed. It is possible there are larger keys in use in private PKIs, but we target the web PKI, so causing breakage here in the interests of increasing the default safety of users of crypto/tls seems reasonable.",
  "id": "GHSA-xc82-5m89-g4jv",
  "modified": "2023-11-25T12:30:22Z",
  "published": "2023-08-02T21:30:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-29409"
    },
    {
      "type": "WEB",
      "url": "https://go.dev/cl/515257"
    },
    {
      "type": "WEB",
      "url": "https://go.dev/issue/61460"
    },
    {
      "type": "WEB",
      "url": "https://groups.google.com/g/golang-announce/c/X0b6CsSAaYI/m/Efv5DbZ9AwAJ"
    },
    {
      "type": "WEB",
      "url": "https://pkg.go.dev/vuln/GO-2023-1987"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202311-09"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20230831-0010"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2023-29409 (GCVE-0-2023-29409)

Vulnerability from cvelistv5 – Published: 2023-08-02 19:47 – Updated: 2025-02-13 16:49

Title

Large RSA keys can cause high CPU usage in crypto/tls

Summary

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-10-22 14:15 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

Go Google root Scorecard

References

6 references

URL	Tags
https://go.dev/issue/61460
https://go.dev/cl/515257
https://groups.google.com/g/golang-announce/c/X0b…
https://pkg.go.dev/vuln/GO-2023-1987
https://security.netapp.com/advisory/ntap-2023083…
https://security.gentoo.org/glsa/202311-09

Impacted products

1 product

Vendor	Product	Version
Go standard library	crypto/tls	Affected: 0 , < 1.19.12 (semver) Affected: 1.20.0-0 , < 1.20.7 (semver) Affected: 1.21.0-0 , < 1.21.0-rc.4 (semver)

Credits

Mateusz Poliwczak

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T14:07:46.160Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
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        "references": [
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            "tags": [
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            "url": "https://go.dev/issue/61460"
          },
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            "tags": [
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            "url": "https://go.dev/cl/515257"
          },
          {
            "tags": [
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            "url": "https://groups.google.com/g/golang-announce/c/X0b6CsSAaYI/m/Efv5DbZ9AwAJ"
          },
          {
            "tags": [
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            "url": "https://pkg.go.dev/vuln/GO-2023-1987"
          },
          {
            "tags": [
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            ],
            "url": "https://security.netapp.com/advisory/ntap-20230831-0010/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/202311-09"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
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            "other": {
              "content": {
                "id": "CVE-2023-29409",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-10-22T14:15:51.334084Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-10-22T14:16:01.839Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
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    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "crypto/tls",
          "product": "crypto/tls",
          "programRoutines": [
            {
              "name": "Conn.verifyServerCertificate"
            },
            {
              "name": "Conn.processCertsFromClient"
            },
            {
              "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": [
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              "status": "affected",
              "version": "0",
              "versionType": "semver"
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              "status": "affected",
              "version": "1.20.0-0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.21.0-rc.4",
              "status": "affected",
              "version": "1.21.0-0",
              "versionType": "semver"
            }
          ]
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          "value": "Mateusz Poliwczak"
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        }
      ],
      "problemTypes": [
        {
          "descriptions": [
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              "description": "CWE-400: Uncontrolled Resource Consumption",
              "lang": "en"
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      ],
      "providerMetadata": {
        "dateUpdated": "2023-11-25T11:09:25.696Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
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      "references": [
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        },
        {
          "url": "https://go.dev/cl/515257"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/X0b6CsSAaYI/m/Efv5DbZ9AwAJ"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2023-1987"
        },
        {
          "url": "https://security.netapp.com/advisory/ntap-20230831-0010/"
        },
        {
          "url": "https://security.gentoo.org/glsa/202311-09"
        }
      ],
      "title": "Large RSA keys can cause high CPU usage in crypto/tls"
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    "assignerShortName": "Go",
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    "datePublished": "2023-08-02T19:47:23.829Z",
    "dateReserved": "2023-04-05T19:36:35.043Z",
    "dateUpdated": "2025-02-13T16:49:16.368Z",
    "state": "PUBLISHED"
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  "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.

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.

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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.

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GHSA-XC82-5M89-G4JV

CVE-2023-29409 (GCVE-0-2023-29409)

Tags

Sightings

Nomenclature

Related by attack behaviour