CVE-2026-14570

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{"affected": [{"affectedData": [{"collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected", "packageName": "Crypt-DSA", "product": "Crypt::DSA", "programFiles": ["lib/Crypt/DSA/Util.pm", "lib/Crypt/DSA.pm", "lib/Crypt/DSA/KeyChain.pm"], "programRoutines": [{"name": "Crypt::DSA::Util::makerandom"}, {"name": "Crypt::DSA::sign"}, {"name": "Crypt::DSA::KeyChain::generate_keys"}], "repo": "https://github.com/perl-Crypt-OpenPGP/Crypt-DSA", "vendor": "TIMLEGGE", "versions": [{"lessThan": "1.22", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Las versiones de Crypt::DSA anteriores a la 1.22 para Perl obtienen el nonce de firma DSA y la clave privada de un generador de n\u00fameros aleatorios sesgado, lo que lleva a la recuperaci\u00f3n de la clave privada.\n\n\u2019Crypt::DSA::Util::makerandom fuerza el bit m\u00e1s significativo de cada valor que devuelve para obtener un entero de exactamente N bits para la b\u00fasqueda de primos. El nonce de firma y la clave privada se obtienen de makerandom. Debido a que el bit m\u00e1s significativo siempre est\u00e1 establecido, el resultado no es uniforme: su bit superior est\u00e1 fijo, produciendo valores inseguros.\u2019\n\nUn atacante que recopila un n\u00famero modesto de firmas bajo una clave afectada, junto con la clave p\u00fablica, puede recuperar la clave privada con un ataque de celos\u00eda.\n\nLas claves utilizadas para firmar con una versi\u00f3n afectada deben considerarse comprometidas y se deben generar nuevas claves."}], "id": "CVE-2026-14570", "lastModified": "2026-10-25T15:10:00.147", "metrics": {"cvssMetricV31": [{"cvssData": {"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, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-14570", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-07-06T13:41:52.097549Z", "version": "2.0.3"}}]}, "published": "2026-07-05T02:17:40.190", "references": [{"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.21/source/lib/Crypt/DSA/Util.pm#L56"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.22/changes"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.22/diff/TIMLEGGE/Crypt-DSA-1.21#lib/Crypt/DSA/Util.pm"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2026/07/05/1"}], "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-330"}], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "type": "Secondary"}]}

{"bugzilla": {"description": "Crypt::DSA: Crypt::DSA: Private key recovery due to biased random number generation", "id": "2497106", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2497106"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-338", "details": ["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\"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.\"\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.\nKeys used to sign with an affected version should be considered compromised and new keys should be generated.", "A flaw was found in Crypt::DSA. Versions before 1.22 for Perl use a biased random number generator when creating the Digital Signature Algorithm (DSA) signing nonce and private key. This bias allows a remote attacker to recover the private key through a lattice attack if they collect a sufficient number of signatures and have access to the public key. This vulnerability compromises the confidentiality of the private key."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2026-14570", "public_date": "2026-07-05T01:30:12Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-14570\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-14570\nhttps://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.21/source/lib/Crypt/DSA/Util.pm#L56\nhttps://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.22/changes\nhttps://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.22/diff/TIMLEGGE/Crypt-DSA-1.21#lib/Crypt/DSA/Util.pm"], "statement": "A flaw was found in the Perl Crypt::DSA module. The random number generator used for DSA signing nonces and private key generation has a bias (the high bit is always set), allowing an attacker who collects a modest number of signatures to recover the private key via a lattice attack. Red Hat does not ship perl-Crypt-DSA in any supported product. This issue only affects the perl-Crypt-DSA package available in Fedora and EPEL community repositories.", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,1.22)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Crypt::DSA", "source": "cna", "vendor": "TIMLEGGE"}, "product": "crypt::dsa", "vendor": "timlegge"}], "created": "2026-07-05T03:30:05.365068+00:00", "updated": "2026-07-31T14:45:03.275486+00:00", "vendors": ["timlegge", "timlegge$PRODUCT$crypt::dsa"]}