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.

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{
   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'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.",
   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

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	Version
	n/a	n/a	Version: n/a

Show details on NVD website

JSON

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{
   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'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.",
            },
         ],
         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",
}

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

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.

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