{"id":"CVE-2009-2621","aliases":["DSA-1843-1","DSA-1843-2","EUVD-2009-2616","GHSA-g3mg-m63j-55xf"],"status":"published","title":"Squid 3.0 through 3.0.STABLE16 and 3.1 through 3.1.0.11 does not properly enforce \"buffer limits...","description":"Squid 3.0 through 3.0.STABLE16 and 3.1 through 3.1.0.11 does not properly enforce \"buffer limits and related bound checks,\" which allows remote attackers to cause a denial of service via (1) an incomplete request or (2) a request with a large header size, related to (a) HttpMsg.cc and (b) client_side.cc.","severity":{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.23049,"percentile":0.97767,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-119"],"published":"2009-07-28T00:00:00Z","modified":"2026-06-16T23:09:51Z","affected":[{"source":"osv","ecosystem":"Debian:5.0","package":"squid3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.STABLE8-3+lenny1"}]}],"versions":["3.0.STABLE8-2","3.0.STABLE8-3"],"bundled":2},{"source":"osv","ecosystem":"Debian:5.0","package":"squid3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.STABLE-3+lenny2"}]}],"bundled":2}],"products":[{"vendor":"squid-cache","product":"squid"}],"references":[{"url":"http://www.squid-cache.org/Versions/v3/3.1/changesets/b9654.patch","tags":["x_refsource_CONFIRM","x_transferred","Patch"]},{"url":"http://www.securitytracker.com/id?1022607","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred"]},{"url":"http://www.securityfocus.com/bid/35812","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"http://www.vupen.com/english/advisories/2009/2013","tags":["vdb-entry","x_refsource_VUPEN","x_transferred"]},{"url":"http://secunia.com/advisories/36007","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred"]},{"url":"http://www.squid-cache.org/Advisories/SQUID-2009_2.txt","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2009:161","tags":["vendor-advisory","x_refsource_MANDRIVA","x_transferred"]},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2009:178","tags":["vendor-advisory","x_refsource_MANDRIVA","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2009-2621"},{"url":"https://github.com/advisories/GHSA-g3mg-m63j-55xf"}],"sources":{"cve":[{"id":"CVE-2009-2621","description":"Squid 3.0 through 3.0.STABLE16 and 3.1 through 3.1.0.11 does not properly enforce \"buffer limits and related bound checks,\" which allows remote attackers to cause a denial of service via (1) an incomplete request or (2) a request with a large header size, related to (a) HttpMsg.cc and (b) client_side.cc.","status":"published","published":"2009-07-28T17:00:00Z","modified":"2024-08-07T05:59:55.743Z","updated_at":"2026-11-02T14:33:23.395558Z"}],"euvd":[{"id":"EUVD-2009-2616","description":"Squid 3.0 through 3.0.STABLE16 and 3.1 through 3.1.0.11 does not properly enforce \"buffer limits and related bound checks,\" which allows remote attackers to cause a denial of service via (1) an incomplete request or (2) a request with a large header size, related to (a) HttpMsg.cc and (b) client_side.cc.","status":"published","published":"2009-07-28T17:00:00Z","modified":"2024-08-07T05:59:55Z","updated_at":"2026-11-03T01:39:17.005545Z"}],"ghsa":[{"id":"GHSA-g3mg-m63j-55xf","title":"Squid 3.0 through 3.0.STABLE16 and 3.1 through 3.1.0.11 does not properly enforce \"buffer limits...","description":"Squid 3.0 through 3.0.STABLE16 and 3.1 through 3.1.0.11 does not properly enforce \"buffer limits and related bound checks,\" which allows remote attackers to cause a denial of service via (1) an incomplete request or (2) a request with a large header size, related to (a) HttpMsg.cc and (b) client_side.cc.","status":"published","published":"2022-05-02T03:37:06Z","modified":"2023-01-31T05:07:34Z","cwes":["CWE-119"],"updated_at":"2026-11-02T14:49:14.096889Z"}],"nvd":[{"id":"CVE-2009-2621","description":"Squid 3.0 through 3.0.STABLE16 and 3.1 through 3.1.0.11 does not properly enforce \"buffer limits and related bound checks,\" which allows remote attackers to cause a denial of service via (1) an incomplete request or (2) a request with a large header size, related to (a) HttpMsg.cc and (b) client_side.cc.","status":"published","published":"2009-07-28T17:30:01.077Z","modified":"2026-06-16T23:09:51.48Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T14:01:36.200173Z"}],"osv":[{"id":"DSA-1843-1","title":"squid3 - denial of service","status":"published","published":"2009-07-28T00:00:00Z","modified":"2026-03-09T01:21:28.446198Z","updated_at":"2026-11-02T15:46:14.734124Z"},{"id":"DSA-1843-2","title":"squid3 - regression fix","status":"published","published":"2009-08-09T00:00:00Z","modified":"2026-03-09T01:21:29.847526Z","updated_at":"2026-11-02T15:46:14.734124Z"}]}}