gsd-2021-33560
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
Libgcrypt before 1.8.8 and 1.9.x before 1.9.3 mishandles ElGamal encryption because it lacks exponent blinding to address a side-channel attack against mpi_powm, and the window size is not chosen appropriately. This, for example, affects use of ElGamal in OpenPGP.
Aliases
Aliases
CVE-2021-33560


To clipboard 

{
   GSD: {
      alias: "CVE-2021-33560",
      description: "Libgcrypt before 1.8.8 and 1.9.x before 1.9.3 mishandles ElGamal encryption because it lacks exponent blinding to address a side-channel attack against mpi_powm, and the window size is not chosen appropriately. This, for example, affects use of ElGamal in OpenPGP.",
      id: "GSD-2021-33560",
      references: [
         "https://www.suse.com/security/cve/CVE-2021-33560.html",
         "https://access.redhat.com/errata/RHSA-2021:4409",
         "https://ubuntu.com/security/CVE-2021-33560",
         "https://advisories.mageia.org/CVE-2021-33560.html",
         "https://security.archlinux.org/CVE-2021-33560",
         "https://alas.aws.amazon.com/cve/html/CVE-2021-33560.html",
         "https://linux.oracle.com/cve/CVE-2021-33560.html",
      ],
   },
   gsd: {
      metadata: {
         exploitCode: "unknown",
         remediation: "unknown",
         reportConfidence: "confirmed",
         type: "vulnerability",
      },
      osvSchema: {
         aliases: [
            "CVE-2021-33560",
         ],
         details: "Libgcrypt before 1.8.8 and 1.9.x before 1.9.3 mishandles ElGamal encryption because it lacks exponent blinding to address a side-channel attack against mpi_powm, and the window size is not chosen appropriately. This, for example, affects use of ElGamal in OpenPGP.",
         id: "GSD-2021-33560",
         modified: "2023-12-13T01:23:18.427902Z",
         schema_version: "1.4.0",
      },
   },
   namespaces: {
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         CVE_data_meta: {
            ASSIGNER: "cve@mitre.org",
            ID: "CVE-2021-33560",
            STATE: "PUBLIC",
         },
         affects: {
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                     product: {
                        product_data: [
                           {
                              product_name: "n/a",
                              version: {
                                 version_data: [
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               },
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                  refsource: "GENTOO",
                  url: "https://security.gentoo.org/glsa/202210-13",
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            ],
         },
      },
      "nvd.nist.gov": {
         configurations: {
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                     },
                     {
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                        cpe_name: [],
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                     },
                     {
                        cpe23Uri: "cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.15.1:*:*:*:*:*:*:*",
                        cpe_name: [],
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                        cpe23Uri: "cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:1.11.0:*:*:*:*:*:*:*",
                        cpe_name: [],
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                  operator: "OR",
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         },
         cve: {
            CVE_data_meta: {
               ASSIGNER: "cve@mitre.org",
               ID: "CVE-2021-33560",
            },
            data_format: "MITRE",
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            data_version: "4.0",
            description: {
               description_data: [
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                     lang: "en",
                     value: "Libgcrypt before 1.8.8 and 1.9.x before 1.9.3 mishandles ElGamal encryption because it lacks exponent blinding to address a side-channel attack against mpi_powm, and the window size is not chosen appropriately. This, for example, affects use of ElGamal in OpenPGP.",
                  },
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            },
            problemtype: {
               problemtype_data: [
                  {
                     description: [
                        {
                           lang: "en",
                           value: "CWE-203",
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         },
         impact: {
            baseMetricV2: {
               acInsufInfo: false,
               cvssV2: {
                  accessComplexity: "LOW",
                  accessVector: "NETWORK",
                  authentication: "NONE",
                  availabilityImpact: "NONE",
                  baseScore: 5,
                  confidentialityImpact: "PARTIAL",
                  integrityImpact: "NONE",
                  vectorString: "AV:N/AC:L/Au:N/C:P/I:N/A:N",
                  version: "2.0",
               },
               exploitabilityScore: 10,
               impactScore: 2.9,
               obtainAllPrivilege: false,
               obtainOtherPrivilege: false,
               obtainUserPrivilege: false,
               severity: "MEDIUM",
               userInteractionRequired: false,
            },
            baseMetricV3: {
               cvssV3: {
                  attackComplexity: "LOW",
                  attackVector: "NETWORK",
                  availabilityImpact: "NONE",
                  baseScore: 7.5,
                  baseSeverity: "HIGH",
                  confidentialityImpact: "HIGH",
                  integrityImpact: "NONE",
                  privilegesRequired: "NONE",
                  scope: "UNCHANGED",
                  userInteraction: "NONE",
                  vectorString: "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  version: "3.1",
               },
               exploitabilityScore: 3.9,
               impactScore: 3.6,
            },
         },
         lastModifiedDate: "2022-12-07T01:20Z",
         publishedDate: "2021-06-08T11:15Z",
      },
   },
}


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