{"cve":"CVE-2013-4434","nvd":{"published":"2013-10-25T23:55:03.957","modified":"2026-06-16T23:57:13.417","status":"Modified","description":"Dropbear SSH Server before 2013.59 generates error messages for a failed logon attempt with different time delays depending on whether the user account exists, which allows remote attackers to discover valid usernames.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-189"],"references":["http://lists.opensuse.org/opensuse-updates/2013-10/msg00061.html","http://lists.opensuse.org/opensuse-updates/2013-11/msg00046.html","http://secunia.com/advisories/55173","http://www.openwall.com/lists/oss-security/2013/10/16/11","http://www.securityfocus.com/bid/62993"],"products":["dropbear_ssh_project:dropbear_ssh"],"source":"nvd","synced_at":"2026-10-19T20:30:15.895642412+00:00"},"epss":{"cve":"CVE-2013-4434","score":0.05749,"percentile":0.93068,"date":"2026-10-31"},"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."]}