github - ghsa-8vmc-7qrc-q5mx

ghsa-8vmc-7qrc-q5mx

Vulnerability from github

Published

2022-11-15 12:00

Modified

2024-04-23 09:30

Severity ?

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

Using long exponents in the Diffie-Hellman Key Agreement Protocol allows remote attackers (from the client side) to trigger unnecessarily expensive server-side DHE modular-exponentiation calculations. An attacker may cause asymmetric resource consumption with any common client application which uses a DHE implementation that applies short exponents. The attack may be more disruptive in cases where a client sends arbitrary numbers that are actually not DH public keys (aka the D(HE)ater attack) or can require a server to select its largest supported key size. The basic attack scenario is that the client must claim that it can only communicate with DHE, and the server must be configured to allow DHE. This can affect TLS, SSH, and IKE.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2022-40735"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-11-14T23:15:00Z",
    "severity": "HIGH"
  },
  "details": "Using long exponents in the Diffie-Hellman Key Agreement Protocol allows remote attackers (from the client side) to trigger unnecessarily expensive server-side DHE modular-exponentiation calculations. An attacker may cause asymmetric resource consumption with any common client application which uses a DHE implementation that applies short exponents. The attack may be more disruptive in cases where a client sends arbitrary numbers that are actually not DH public keys (aka the D(HE)ater attack) or can require a server to select its largest supported key size. The basic attack scenario is that the client must claim that it can only communicate with DHE, and the server must be configured to allow DHE. This can affect TLS, SSH, and IKE.",
  "id": "GHSA-8vmc-7qrc-q5mx",
  "modified": "2024-04-23T09:30:46Z",
  "published": "2022-11-15T12:00:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-40735"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mozilla/ssl-config-generator/issues/162"
    },
    {
      "type": "WEB",
      "url": "https://dheatattack.gitlab.io"
    },
    {
      "type": "WEB",
      "url": "https://gist.github.com/c0r0n3r/9455ddcab985c50fd1912eabf26e058b"
    },
    {
      "type": "WEB",
      "url": "https://ieeexplore.ieee.org/document/10374117"
    },
    {
      "type": "WEB",
      "url": "https://link.springer.com/content/pdf/10.1007/3-540-68339-9_29.pdf"
    },
    {
      "type": "WEB",
      "url": "https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-57pt1r5.pdf"
    },
    {
      "type": "WEB",
      "url": "https://raw.githubusercontent.com/CVEProject/cvelist/9d7fbbcabd3f44cfedc9e8807757d31ece85a2c6/2022/40xxx/CVE-2022-40735.json"
    },
    {
      "type": "WEB",
      "url": "https://www.researchgate.net/profile/Anton-Stiglic-2/publication/2401745_Security_Issues_in_the_Diffie-Hellman_Key_Agreement_Protocol/links/546c144f0cf20dedafd53e7e/Security-Issues-in-the-Diffie-Hellman-Key-Agreement-Protocol.pdf"
    },
    {
      "type": "WEB",
      "url": "https://www.rfc-editor.org/rfc/rfc3526"
    },
    {
      "type": "WEB",
      "url": "https://www.rfc-editor.org/rfc/rfc4419"
    },
    {
      "type": "WEB",
      "url": "https://www.rfc-editor.org/rfc/rfc5114#section-4"
    },
    {
      "type": "WEB",
      "url": "https://www.rfc-editor.org/rfc/rfc7919#section-5.2"
    }
  ],
  "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:H",
      "type": "CVSS_V3"
    }
  ]
}

cve-2022-40735

Vulnerability from cvelistv5

Published

2022-11-14 00:00

Modified

2024-08-03 12:28

Severity ?

Summary

The Diffie-Hellman Key Agreement Protocol allows use of long exponents that arguably make certain calculations unnecessarily expensive, because the 1996 van Oorschot and Wiener paper found that "(appropriately) short exponents" can be used when there are adequate subgroup constraints, and these short exponents can lead to less expensive calculations than for long exponents. This issue is different from CVE-2002-20001 because it is based on an observation about exponent size, rather than an observation about numbers that are not public keys. The specific situations in which calculation expense would constitute a server-side vulnerability depend on the protocol (e.g., TLS, SSH, or IKE) and the DHE implementation details. In general, there might be an availability concern because of server-side resource consumption from DHE modular-exponentiation calculations. Finally, it is possible for an attacker to exploit this vulnerability and CVE-2002-20001 together.

References

▼	URL	Tags
	https://github.com/mozilla/ssl-config-generator/issues/162
	https://gist.github.com/c0r0n3r/9455ddcab985c50fd1912eabf26e058b
	https://link.springer.com/content/pdf/10.1007/3-540-68339-9_29.pdf
	https://www.researchgate.net/profile/Anton-Stiglic-2/publication/2401745_Security_Issues_in_the_Diffie-Hellman_Key_Agreement_Protocol/links/546c144f0cf20dedafd53e7e/Security-Issues-in-the-Diffie-Hellman-Key-Agreement-Protocol.pdf
	https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-57pt1r5.pdf
	https://www.rfc-editor.org/rfc/rfc4419
	https://www.rfc-editor.org/rfc/rfc5114#section-4
	https://www.rfc-editor.org/rfc/rfc7919#section-5.2
	https://raw.githubusercontent.com/CVEProject/cvelist/9d7fbbcabd3f44cfedc9e8807757d31ece85a2c6/2022/40xxx/CVE-2022-40735.json
	https://www.rfc-editor.org/rfc/rfc3526
	https://dheatattack.gitlab.io/
	https://ieeexplore.ieee.org/document/10374117

Impacted products

Vendor

Product

Version

▼

n/a

Version: n/a

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T12:28:41.552Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/mozilla/ssl-config-generator/issues/162"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://gist.github.com/c0r0n3r/9455ddcab985c50fd1912eabf26e058b"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://link.springer.com/content/pdf/10.1007/3-540-68339-9_29.pdf"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.researchgate.net/profile/Anton-Stiglic-2/publication/2401745_Security_Issues_in_the_Diffie-Hellman_Key_Agreement_Protocol/links/546c144f0cf20dedafd53e7e/Security-Issues-in-the-Diffie-Hellman-Key-Agreement-Protocol.pdf"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-57pt1r5.pdf"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.rfc-editor.org/rfc/rfc4419"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.rfc-editor.org/rfc/rfc5114#section-4"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.rfc-editor.org/rfc/rfc7919#section-5.2"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://raw.githubusercontent.com/CVEProject/cvelist/9d7fbbcabd3f44cfedc9e8807757d31ece85a2c6/2022/40xxx/CVE-2022-40735.json"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.rfc-editor.org/rfc/rfc3526"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://dheatattack.gitlab.io/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://ieeexplore.ieee.org/document/10374117"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Diffie-Hellman Key Agreement Protocol allows use of long exponents that arguably make certain calculations unnecessarily expensive, because the 1996 van Oorschot and Wiener paper found that \"(appropriately) short exponents\" can be used when there are adequate subgroup constraints, and these short exponents can lead to less expensive calculations than for long exponents. This issue is different from CVE-2002-20001 because it is based on an observation about exponent size, rather than an observation about numbers that are not public keys. The specific situations in which calculation expense would constitute a server-side vulnerability depend on the protocol (e.g., TLS, SSH, or IKE) and the DHE implementation details. In general, there might be an availability concern because of server-side resource consumption from DHE modular-exponentiation calculations. Finally, it is possible for an attacker to exploit this vulnerability and CVE-2002-20001 together."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-04-23T06:49:41.370072",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://github.com/mozilla/ssl-config-generator/issues/162"
        },
        {
          "url": "https://gist.github.com/c0r0n3r/9455ddcab985c50fd1912eabf26e058b"
        },
        {
          "url": "https://link.springer.com/content/pdf/10.1007/3-540-68339-9_29.pdf"
        },
        {
          "url": "https://www.researchgate.net/profile/Anton-Stiglic-2/publication/2401745_Security_Issues_in_the_Diffie-Hellman_Key_Agreement_Protocol/links/546c144f0cf20dedafd53e7e/Security-Issues-in-the-Diffie-Hellman-Key-Agreement-Protocol.pdf"
        },
        {
          "url": "https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-57pt1r5.pdf"
        },
        {
          "url": "https://www.rfc-editor.org/rfc/rfc4419"
        },
        {
          "url": "https://www.rfc-editor.org/rfc/rfc5114#section-4"
        },
        {
          "url": "https://www.rfc-editor.org/rfc/rfc7919#section-5.2"
        },
        {
          "url": "https://raw.githubusercontent.com/CVEProject/cvelist/9d7fbbcabd3f44cfedc9e8807757d31ece85a2c6/2022/40xxx/CVE-2022-40735.json"
        },
        {
          "url": "https://www.rfc-editor.org/rfc/rfc3526"
        },
        {
          "url": "https://dheatattack.gitlab.io/"
        },
        {
          "url": "https://ieeexplore.ieee.org/document/10374117"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2022-40735",
    "datePublished": "2022-11-14T00:00:00",
    "dateReserved": "2022-09-15T00:00:00",
    "dateUpdated": "2024-08-03T12:28:41.552Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.
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.

Action not permitted