{"id":"CVE-2009-4016","aliases":["DEBIAN-CVE-2009-4016","DSA-1980-1","EUVD-2009-3987","GHSA-hxqm-w72v-m7v5","UBUNTU-CVE-2009-4016"],"status":"published","title":"Integer underflow in the clean_string function in irc_string.c in (1) IRCD-hybrid 7.2.2 and 7.2.3...","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.","severity":{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.04026,"percentile":0.90656,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-189"],"published":"2010-01-27T00:00:00Z","modified":"2026-10-23T17:47:35Z","fixes":[{"ecosystem":"Debian:12","package":"ircd-hybrid","fixed_in":["1:7.2.2.dfsg.2-6.1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"ircd-hybrid","fixed_in":["1:7.2.2.dfsg.2-6.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"ircd-hybrid","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:7.2.2.dfsg.2-6.1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"ircd-hybrid","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:7.2.2.dfsg.2-6.1"}]}]},{"source":"osv","ecosystem":"Debian:5.0","package":"ircd-ratbox","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.8.dfsg-2+lenny1"}]}],"versions":["2.2.8.dfsg-2"],"bundled":2},{"source":"osv","ecosystem":"Debian:4.0","package":"ircd-hybrid","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:7.2.2.dfsg.2-3+etch1"}]}],"versions":["1:7.2.2.dfsg.2-3"],"bundled":2},{"source":"osv","ecosystem":"Debian:5.0","package":"ircd-hybrid","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:7.2.2.dfsg.2-4+lenny1"}]}],"versions":["1:7.2.2.dfsg.2-4"],"bundled":2}],"products":[{"vendor":"ircd-hybrid","product":"ircd-hybrid"},{"vendor":"ircd-ratbox","product":"ircd-ratbox"},{"vendor":"oftc","product":"oftc-hybrid"}],"references":[{"url":"http://secunia.com/advisories/38382","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory","advisory"]},{"url":"http://secunia.com/advisories/38381","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory","advisory"]},{"url":"http://lists.ratbox.org/pipermail/ircd-ratbox/2010-January/000891.html","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"http://www.debian.org/security/2010/dsa-1980","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","Patch","fix","report"]},{"url":"http://secunia.com/advisories/38383","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory","advisory"]},{"url":"http://trac.oftc.net/projects/oftc-hybrid/browser/tags/oftc-hybrid-1.6.8/RELNOTES","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"http://www.securityfocus.com/bid/37978","tags":["vdb-entry","x_refsource_BID","x_transferred","web"]},{"url":"http://svn.ircd-hybrid.org:8000/viewcvs.cgi?rev=1044\u0026view=rev","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"http://secunia.com/advisories/38210","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory","advisory"]},{"url":"http://security.debian.org/pool/updates/main/i/ircd-hybrid/ircd-hybrid_7.2.2.dfsg.2-4+lenny1.diff.gz","tags":["x_refsource_CONFIRM","x_transferred","Patch","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2009-4016"},{"url":"https://github.com/advisories/GHSA-hxqm-w72v-m7v5"},{"url":"https://security-tracker.debian.org/tracker/CVE-2009-4016","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2009-4016","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2009-4016","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2009-4016","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.","status":"published","published":"2010-02-04T18:00:00Z","modified":"2024-09-16T20:58:11.702Z","updated_at":"2026-11-02T14:33:24.782697Z"}],"euvd":[{"id":"EUVD-2009-3987","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.","status":"published","published":"2010-02-04T18:00:00Z","modified":"2024-09-16T20:58:11Z","updated_at":"2026-11-03T00:55:09.505787Z"}],"ghsa":[{"id":"GHSA-hxqm-w72v-m7v5","title":"Integer underflow in the clean_string function in irc_string.c in (1) IRCD-hybrid 7.2.2 and 7.2.3...","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.","status":"published","published":"2022-05-02T03:50:42Z","modified":"2023-01-31T05:08:57Z","updated_at":"2026-11-02T14:49:28.537064Z"}],"nvd":[{"id":"CVE-2009-4016","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.","status":"published","published":"2010-02-04T20:15:23.75Z","modified":"2026-06-16T23:12:50.1Z","cvss":[{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-189"],"updated_at":"2026-11-02T14:01:38.33745Z"}],"osv":[{"id":"CVE-2009-4016","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.","status":"published","published":"2010-02-04T20:15:23Z","modified":"2026-04-10T03:40:59.270189Z","updated_at":"2026-11-02T15:43:57.714116Z"},{"id":"DEBIAN-CVE-2009-4016","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.","status":"published","published":"2010-02-04T20:15:23.75Z","modified":"2026-10-23T17:47:35.59127271Z","updated_at":"2026-11-02T15:45:24.013654Z"},{"id":"DSA-1980-1","title":"ircd-hybrid ircd-ratbox - arbitrary code execution","status":"published","published":"2010-01-27T00:00:00Z","modified":"2026-03-09T01:21:49.777938Z","updated_at":"2026-11-02T15:46:15.108335Z"},{"id":"UBUNTU-CVE-2009-4016","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.","status":"withdrawn","published":"2010-02-04T20:15:00Z","modified":"2025-07-16T08:10:25.650664Z","updated_at":"2026-11-02T15:54:05.838224Z"}]}}