github - ghsa-8m2v-68m9-q2c7

ghsa-8m2v-68m9-q2c7

Vulnerability from github

Published

2022-05-24 19:13

Modified

2022-10-31 12:00

Severity ?

5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Details

The ElGamal implementation in Libgcrypt before 1.9.4 allows plaintext recovery because, during interaction between two cryptographic libraries, a certain dangerous combination of the prime defined by the receiver's public key, the generator defined by the receiver's public key, and the sender's ephemeral exponents can lead to a cross-configuration attack against OpenPGP.

Show details on source website

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2021-40528"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-327"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-09-06T19:15:00Z",
    "severity": "MODERATE"
  },
  "details": "The ElGamal implementation in Libgcrypt before 1.9.4 allows plaintext recovery because, during interaction between two cryptographic libraries, a certain dangerous combination of the prime defined by the receiver\u0027s public key, the generator defined by the receiver\u0027s public key, and the sender\u0027s ephemeral exponents can lead to a cross-configuration attack against OpenPGP.",
  "id": "GHSA-8m2v-68m9-q2c7",
  "modified": "2022-10-31T12:00:21Z",
  "published": "2022-05-24T19:13:02Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-40528"
    },
    {
      "type": "WEB",
      "url": "https://eprint.iacr.org/2021/923"
    },
    {
      "type": "WEB",
      "url": "https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=3462280f2e23e16adf3ed5176e0f2413d8861320"
    },
    {
      "type": "WEB",
      "url": "https://ibm.github.io/system-security-research-updates/2021/07/20/insecurity-elgamal-pt1"
    },
    {
      "type": "WEB",
      "url": "https://ibm.github.io/system-security-research-updates/2021/09/06/insecurity-elgamal-pt2"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202210-13"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

cve-2021-40528

Vulnerability from cvelistv5

Published

2021-09-06 00:00

Modified

2024-08-04 02:44

Severity ?

Summary

The ElGamal implementation in Libgcrypt before 1.9.4 allows plaintext recovery because, during interaction between two cryptographic libraries, a certain dangerous combination of the prime defined by the receiver's public key, the generator defined by the receiver's public key, and the sender's ephemeral exponents can lead to a cross-configuration attack against OpenPGP.

References

▼	URL	Tags
	https://eprint.iacr.org/2021/923
	https://ibm.github.io/system-security-research-updates/2021/07/20/insecurity-elgamal-pt1
	https://ibm.github.io/system-security-research-updates/2021/09/06/insecurity-elgamal-pt2
	https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=3462280f2e23e16adf3ed5176e0f2413d8861320
	https://security.gentoo.org/glsa/202210-13	vendor-advisory

Impacted products

▼	Vendor	Product
	n/a	n/a

Show details on NVD website

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T02:44:10.845Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://eprint.iacr.org/2021/923"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://ibm.github.io/system-security-research-updates/2021/07/20/insecurity-elgamal-pt1"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://ibm.github.io/system-security-research-updates/2021/09/06/insecurity-elgamal-pt2"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=3462280f2e23e16adf3ed5176e0f2413d8861320"
          },
          {
            "name": "GLSA-202210-13",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/202210-13"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The ElGamal implementation in Libgcrypt before 1.9.4 allows plaintext recovery because, during interaction between two cryptographic libraries, a certain dangerous combination of the prime defined by the receiver\u0027s public key, the generator defined by the receiver\u0027s public key, and the sender\u0027s ephemeral exponents can lead to a cross-configuration attack against OpenPGP."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-10-31T00:00:00",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://eprint.iacr.org/2021/923"
        },
        {
          "url": "https://ibm.github.io/system-security-research-updates/2021/07/20/insecurity-elgamal-pt1"
        },
        {
          "url": "https://ibm.github.io/system-security-research-updates/2021/09/06/insecurity-elgamal-pt2"
        },
        {
          "url": "https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=3462280f2e23e16adf3ed5176e0f2413d8861320"
        },
        {
          "name": "GLSA-202210-13",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.gentoo.org/glsa/202210-13"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2021-40528",
    "datePublished": "2021-09-06T00:00:00",
    "dateReserved": "2021-09-06T00:00:00",
    "dateUpdated": "2024-08-04T02:44:10.845Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Log in or create an account to share your comment.

Tags

Taxonomy of the tags.

All sightings related to this event Export sightings related to this event

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.