{"cve":"CVE-2015-6563","nvd":{"published":"2015-08-24T01:59:00.127","modified":"2026-06-17T00:31:03.787","status":"Modified","description":"The monitor component in sshd in OpenSSH before 7.0 on non-OpenBSD platforms accepts extraneous username data in MONITOR_REQ_PAM_INIT_CTX requests, which allows local users to conduct impersonation attacks by leveraging any SSH login access in conjunction with control of the sshd uid to send a crafted MONITOR_REQ_PWNAM request, related to monitor.c and monitor_wrap.c.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","score":6.4},"cwes":["CWE-20"],"references":["http://lists.apple.com/archives/security-announce/2015/Oct/msg00005.html","http://lists.fedoraproject.org/pipermail/package-announce/2015-August/165170.html","http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00017.html","http://rhn.redhat.com/errata/RHSA-2016-0741.html","http://seclists.org/fulldisclosure/2015/Aug/54"],"products":["apple:mac_os_x","openbsd:openssh"],"source":"nvd","synced_at":"2026-10-19T20:37:45.466985407+00:00"},"epss":{"cve":"CVE-2015-6563","score":0.00381,"percentile":0.32177,"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."]}