{"cve":"CVE-2017-20240","nvd":{"published":"2026-06-12T14:16:28.660","modified":"2026-06-17T01:15:29.013","status":"Deferred","description":"Crypt::PBKDF2 versions before 0.261630 for Perl are vulnerable to timing attacks.\n\nThese versions use Perl's built-in eq comparison. Discrepancies in timing could be used to guess the underlying derived-key.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","score":5.9},"cwes":["CWE-208"],"references":["https://github.com/arodland/Crypt-PBKDF2/pull/6","https://metacpan.org/release/ARODLAND/Crypt-PBKDF2-0.161520/source/lib/Crypt/PBKDF2.pm#L123-148","https://metacpan.org/release/ARODLAND/Crypt-PBKDF2-0.261630/changes","http://www.openwall.com/lists/oss-security/2026/06/12/3"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:38:48.522727527+00:00"},"epss":{"cve":"CVE-2017-20240","score":0.00319,"percentile":0.24889,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}