{"cve":"CVE-2009-4016","nvd":{"published":"2010-02-04T20:15:23.750","modified":"2026-06-16T23:12:50.100","status":"Modified","description":"Integer underflow in the clean_string function in irc_string.c in (1) IRCD-hybrid 7.2.2 and 7.2.3, (2) ircd-ratbox before 2.2.9, and (3) oftc-hybrid before 1.6.8, when flatten_links is disabled, allows remote attackers to execute arbitrary code or cause a denial of service (daemon crash) via a LINKS command.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-189"],"references":["http://lists.ratbox.org/pipermail/ircd-ratbox/2010-January/000891.html","http://secunia.com/advisories/38210","http://secunia.com/advisories/38381","http://secunia.com/advisories/38382","http://secunia.com/advisories/38383"],"products":["ircd-hybrid:ircd-hybrid","ircd-ratbox:ircd-ratbox","oftc:oftc-hybrid"],"source":"nvd","synced_at":"2026-10-19T19:55:32.599380760+00:00"},"epss":{"cve":"CVE-2009-4016","score":0.04026,"percentile":0.90588,"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."]}