{
   "document": {
      "aggregate_severity": {
         "text": "medium"
      },
      "category": "csaf_security_advisory",
      "csaf_version": "2.0",
      "distribution": {
         "tlp": {
            "label": "WHITE",
            "url": "https://www.first.org/tlp/"
         }
      },
      "lang": "en",
      "notes": [
         {
            "category": "description",
            "text": "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.",
            "title": "Vulnerability Description"
         }
      ],
      "publisher": {
         "category": "other",
         "contact_details": "gdt@cpan.org",
         "name": "giterlizzi",
         "namespace": "https://github.com/giterlizzi/"
      },
      "references": [
         {
            "category": "self",
            "summary": "CPANSA-Alien-GCrypt-2021-40528-libgcrypt JSON",
            "url": "https://raw.githubusercontent.com/giterlizzi/perl-CPANSA-CSAF/develop/csaf/white/2021/cpansa-alien-gcrypt-2021-40528-libgcrypt.json"
         },
         {
            "category": "external",
            "summary": "https://ibm.github.io/system-security-research-updates/2021/07/20/insecurity-elgamal-pt1",
            "url": "https://ibm.github.io/system-security-research-updates/2021/07/20/insecurity-elgamal-pt1"
         },
         {
            "category": "external",
            "summary": "https://ibm.github.io/system-security-research-updates/2021/09/06/insecurity-elgamal-pt2",
            "url": "https://ibm.github.io/system-security-research-updates/2021/09/06/insecurity-elgamal-pt2"
         },
         {
            "category": "external",
            "summary": "https://eprint.iacr.org/2021/923",
            "url": "https://eprint.iacr.org/2021/923"
         },
         {
            "category": "external",
            "summary": "https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=3462280f2e23e16adf3ed5176e0f2413d8861320",
            "url": "https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=3462280f2e23e16adf3ed5176e0f2413d8861320"
         },
         {
            "category": "external",
            "summary": "CVE-2021-40528 (NVD)",
            "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-40528"
         }
      ],
      "title": "Alien-GCrypt vulnerability",
      "tracking": {
         "current_release_date": "2021-09-06T00:00:00",
         "generator": {
            "engine": {
               "name": "CSAF Perl Toolkit",
               "version": "0.25"
            }
         },
         "id": "CPANSA-Alien-GCrypt-2021-40528-libgcrypt",
         "initial_release_date": "2021-09-06T00:00:00",
         "revision_history": [
            {
               "date": "2021-09-06T00:00:00",
               "number": "1",
               "summary": "First release"
            }
         ],
         "status": "final",
         "version": "1"
      }
   },
   "product_tree": {
      "branches": [
         {
            "branches": [
               {
                  "category": "product_version_range",
                  "name": "vers:cpan/==1.6.5.0",
                  "product": {
                     "name": "Alien-GCrypt equal =1.6.5.0",
                     "product_id": "CSAFPID-0001"
                  }
               }
            ],
            "category": "product_name",
            "name": "Alien-GCrypt"
         }
      ]
   },
   "vulnerabilities": [
      {
         "cve": "CVE-2021-40528",
         "cwe": {
            "id": "CWE-327",
            "name": "Use of a Broken or Risky Cryptographic Algorithm"
         },
         "notes": [
            {
               "category": "description",
               "text": "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.",
               "title": "Vulnerability Description"
            }
         ],
         "product_status": {
            "known_affected": [
               "CSAFPID-0001"
            ]
         },
         "scores": [
            {
               "cvss_v2": {
                  "baseScore": 2.6,
                  "vectorString": "AV:N/AC:H/Au:N/C:P/I:N/A:N",
                  "version": "2.0"
               },
               "cvss_v3": {
                  "baseScore": 5.9,
                  "baseSeverity": "MEDIUM",
                  "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "version": "3.1"
               },
               "products": [
                  "CSAFPID-0001"
               ]
            }
         ]
      }
   ]
}