{"id":"CVE-2009-4893","url":"https://www.cyber-defence.io/tools/cve/CVE-2009-4893","generatedAt":"2026-10-27T18:33:49.287Z","title":"Buffer overflow in UnrealIRCd 3.2beta11 through 3.2.8, when allow::options::noident is enabled, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unspecified vectors.","description":"Buffer overflow in UnrealIRCd 3.2beta11 through 3.2.8, when allow::options::noident is enabled, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unspecified vectors.","published":"2010-06-15T14:04:26.000Z","lastModified":"2026-06-16T23:14:33.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"2.0","score":6.8,"severity":"MEDIUM","vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P"},"cwe":["CWE-119"],"affected":["unrealircd/unrealircd"],"epss":{"score":0.02512,"percentile":0.84669,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (2.51%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://security.gentoo.org/glsa/glsa-201006-21.xml","source":"secalert@redhat.com"},{"url":"http://www.openwall.com/lists/oss-security/2010/06/14/13","source":"secalert@redhat.com"},{"url":"http://www.securityfocus.com/bid/42077","source":"secalert@redhat.com"},{"url":"http://www.unrealircd.com/txt/unrealsecadvisory.20090413.txt","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://security.gentoo.org/glsa/glsa-201006-21.xml","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2010/06/14/13","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/42077","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.unrealircd.com/txt/unrealsecadvisory.20090413.txt","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2009-4893","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}