{
   "document": {
      "category": "csaf_security_advisory",
      "csaf_version": "2.0",
      "distribution": {
         "tlp": {
            "label": "WHITE",
            "url": "https://www.first.org/tlp/"
         }
      },
      "lang": "en",
      "notes": [
         {
            "category": "description",
            "text": "Crypt::DSA versions before 1.22 for Perl draw the DSA signing nonce and private key from a biased random generator, leading to private-key recovery.  \"Crypt::DSA::Util::makerandom forces the high bit of every value it returns to obtain an exactly N-bit integer for prime search. The signing nonce and the private key are drawn from makerandom. Because the high bit is always set, the result is not uniform: its top bit is fixed, producing insecure values.\"  An attacker who collects a modest number of signatures under an affected key, together with the public key, can recover the private key with a lattice attack.  Keys used to sign with an affected version should be considered compromised and new keys should be generated.",
            "title": "Vulnerability Description"
         }
      ],
      "publisher": {
         "category": "other",
         "contact_details": "gdt@cpan.org",
         "name": "giterlizzi",
         "namespace": "https://github.com/giterlizzi/"
      },
      "references": [
         {
            "category": "self",
            "summary": "CPANSA-Crypt-DSA-2026-14570 JSON",
            "url": "https://raw.githubusercontent.com/giterlizzi/perl-CPANSA-CSAF/develop/csaf/white/2026/cpansa-crypt-dsa-2026-14570.json"
         },
         {
            "category": "external",
            "summary": "https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.21/source/lib/Crypt/DSA/Util.pm#L56",
            "url": "https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.21/source/lib/Crypt/DSA/Util.pm#L56"
         },
         {
            "category": "external",
            "summary": "https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.22/changes",
            "url": "https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.22/changes"
         },
         {
            "category": "external",
            "summary": "https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.22/diff/TIMLEGGE/Crypt-DSA-1.21#lib/Crypt/DSA/Util.pm",
            "url": "https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.22/diff/TIMLEGGE/Crypt-DSA-1.21#lib/Crypt/DSA/Util.pm"
         },
         {
            "category": "external",
            "summary": "http://www.openwall.com/lists/oss-security/2026/07/05/1",
            "url": "http://www.openwall.com/lists/oss-security/2026/07/05/1"
         },
         {
            "category": "external",
            "summary": "CVE-2026-14570 (NVD)",
            "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-14570"
         }
      ],
      "title": "Crypt-DSA vulnerability",
      "tracking": {
         "current_release_date": "2026-07-05T00:00:00",
         "generator": {
            "engine": {
               "name": "CSAF Perl Toolkit",
               "version": "0.26"
            }
         },
         "id": "CPANSA-Crypt-DSA-2026-14570",
         "initial_release_date": "2026-07-05T00:00:00",
         "revision_history": [
            {
               "date": "2026-07-05T00:00:00",
               "number": "1",
               "summary": "First release"
            }
         ],
         "status": "final",
         "version": "1"
      }
   },
   "product_tree": {
      "branches": [
         {
            "branches": [
               {
                  "category": "product_version_range",
                  "name": "vers:cpan/<1.22",
                  "product": {
                     "name": "Crypt-DSA less than 1.22",
                     "product_id": "CSAFPID-0001",
                     "product_identification_helper": {
                        "purl": "pkg:cpan/Crypt-DSA"
                     }
                  }
               },
               {
                  "category": "product_version_range",
                  "name": "vers:cpan/>=1.22",
                  "product": {
                     "name": "Crypt-DSA greater than or equal 1.22",
                     "product_id": "CSAFPID-0002",
                     "product_identification_helper": {
                        "purl": "pkg:cpan/Crypt-DSA"
                     }
                  }
               }
            ],
            "category": "product_name",
            "name": "Crypt-DSA"
         }
      ]
   },
   "vulnerabilities": [
      {
         "cve": "CVE-2026-14570",
         "cwe": {
            "id": "CWE-330",
            "name": "Use of Insufficiently Random Values"
         },
         "notes": [
            {
               "category": "description",
               "text": "Crypt::DSA versions before 1.22 for Perl draw the DSA signing nonce and private key from a biased random generator, leading to private-key recovery.\n\n\"Crypt::DSA::Util::makerandom forces the high bit of every value it returns to obtain an exactly N-bit integer for prime search. The signing nonce and the private key are drawn from makerandom. Because the high bit is always set, the result is not uniform: its top bit is fixed, producing insecure values.\"\n\nAn attacker who collects a modest number of signatures under an affected key, together with the public key, can recover the private key with a lattice attack.\n\nKeys used to sign with an affected version should be considered compromised and new keys should be generated.",
               "title": "Vulnerability Description"
            }
         ],
         "product_status": {
            "fixed": [
               "CSAFPID-0002"
            ],
            "known_affected": [
               "CSAFPID-0001"
            ]
         },
         "scores": [
            {
               "cvss_v3": {
                  "baseScore": 7.5,
                  "baseSeverity": "HIGH",
                  "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "version": "3.1"
               },
               "products": [
                  "CSAFPID-0001"
               ]
            }
         ]
      }
   ]
}