{"cve":"CVE-2011-1024","nvd":{"published":"2011-03-20T02:00:03.627","modified":"2026-06-16T23:28:34.620","status":"Modified","description":"chain.c in back-ldap in OpenLDAP 2.4.x before 2.4.24, when a master-slave configuration with a chain overlay and ppolicy_forward_updates (aka authentication-failure forwarding) is used, allows remote authenticated users to bypass external-program authentication by sending an invalid password to a slave server.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-264"],"references":["http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705","http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10735","http://openwall.com/lists/oss-security/2011/02/24/12","http://openwall.com/lists/oss-security/2011/02/25/13","http://secunia.com/advisories/43331"],"products":["openldap:openldap"],"source":"nvd","synced_at":"2026-10-19T19:57:56.749847046+00:00"},"epss":{"cve":"CVE-2011-1024","score":0.02593,"percentile":0.85309,"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."]}