{"cve":"CVE-2015-3405","nvd":{"published":"2017-08-09T16:29:00.190","modified":"2026-06-17T00:25:52.583","status":"Modified","description":"ntp-keygen in ntp 4.2.8px before 4.2.8p2-RC2 and 4.3.x before 4.3.12 does not generate MD5 keys with sufficient entropy on big endian machines when the lowest order byte of the temp variable is between 0x20 and 0x7f and not #, which might allow remote attackers to obtain the value of generated MD5 keys via a brute force attack with the 93 possible keys.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-331"],"references":["http://bk1.ntp.org/ntp-stable/?PAGE=patch&REV=55199296N2gFqH1Hm5GOnhrk9Ypygg","http://lists.fedoraproject.org/pipermail/package-announce/2015-April/156248.html","http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00000.html","http://rhn.redhat.com/errata/RHSA-2015-1459.html","http://rhn.redhat.com/errata/RHSA-2015-2231.html"],"products":["debian:debian_linux","fedoraproject:fedora","ntp:ntp","opensuse:suse_linux_enterprise_server","opensuse_project:suse_linux_enterprise_desktop","redhat:enterprise_linux_desktop","redhat:enterprise_linux_for_ibm_z_systems","redhat:enterprise_linux_for_power_big_endian","redhat:enterprise_linux_for_scientific_computing","redhat:enterprise_linux_server","redhat:enterprise_linux_server_from_rhui_6","redhat:enterprise_linux_workstation","suse:suse_linux_enterprise_server"],"source":"nvd","synced_at":"2026-10-19T20:44:47.710380879+00:00"},"epss":{"cve":"CVE-2015-3405","score":0.05292,"percentile":0.92578,"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."]}