{"schemaVersion":3,"id":"CVE-2005-3774","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Cisco PIX 6.3 and 7.0 allows remote attackers to cause a denial of service (blocked new connections) via spoofed TCP packets that cause the PIX to create embryonic connections that that would not produce a valid connection with the end system, including (1) SYN packets with invalid checksums, which do not result in a RST; or, from an external interface, (2) one byte of \"meaningless data,\" or (3) a TTL that is one less than needed to reach the internal destination.","dates":{"published":"2005-11-23T00:00:00.000Z","modified":"2024-08-07T23:24:36.214Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5,"severity":"medium","version":"2.0","versionLabel":"v2.0","source":"NVD","vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","computed":false,"selection":"backend-summary"},"metrics":[{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":5,"severity":"medium","vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.18207,"percentile":0.97206,"severity":"medium","asOf":"2026-10-22T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-22T00:00:00.000Z","baselineScore":0.18207},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-22T00:00:00.000Z","score":0.18207,"percentile":0.97206}],"last30":[{"date":"2026-09-22T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.18207,"percentile":null},{"date":"2026-10-22T00:00:00.000Z","score":0.18207,"percentile":0.97206}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[{"id":"1338","name":"Cisco PIX - Spoofed TCP SYN Packets Remote Denial of Service","source":"exploit-database","url":"https://www.exploit-db.com/exploits/1338","maturity":"poc","reliabilityScore":0.8,"verified":true,"type":"dos","platforms":["hardware"],"requiresAuth":null,"exploitdb":{"verified":true,"type":"dos","platform":"hardware","file":"exploits/hardware/dos/1338.pl","codes":["OSVDB-21053","CVE-2005-3774"]},"metasploit":null},{"id":"26548","name":"Cisco PIX - TCP SYN Packet Denial of Service","source":"exploit-database","url":"https://www.exploit-db.com/exploits/26548","maturity":"poc","reliabilityScore":0.8,"verified":true,"type":"dos","platforms":["hardware"],"requiresAuth":null,"exploitdb":{"verified":true,"type":"dos","platform":"hardware","file":"exploits/hardware/dos/26548.pl","codes":["CVE-2005-3774","OSVDB-24140"]},"metasploit":null}],"exploitCount":2,"weaknesses":[],"affected":[{"vendor":"cisco","product":"pix","name":"pix","label":"pix","ecosystem":null,"cpePart":"h","purl":null,"purlType":null,"versions":[{"text":"6.3","noFixRecorded":false,"fixedIn":null},{"text":"7.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"6.3 | 7.0","eol":null,"hubHref":"/vendor/cisco/pix"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"http://securitytracker.com/id?1015256","label":"securitytracker.com/id?1015256","hostname":"securitytracker.com","tags":["VDB Entry","X Refsource SECTRACK"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/25079","label":"exchange.xforce.ibmcloud.com/vulnerabilities/25079","hostname":"exchange.xforce.ibmcloud.com","tags":["VDB Entry","X Refsource XF"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/25077","label":"exchange.xforce.ibmcloud.com/vulnerabilities/25077","hostname":"exchange.xforce.ibmcloud.com","tags":["VDB Entry","X Refsource XF"]},{"url":"http://www.osvdb.org/24140","label":"www.osvdb.org/24140","hostname":"www.osvdb.org","tags":["VDB Entry","X Refsource OSVDB"]},{"url":"http://www.securityfocus.com/bid/15525","label":"www.securityfocus.com/bid/15525","hostname":"www.securityfocus.com","tags":["VDB Entry","X Refsource BID"]},{"url":"http://www.cisco.com/en/US/products/hw/vpndevc/ps2030/products_security_notice09186a0080624a37.html","label":"www.cisco.com/en/US/products/hw/vpndevc/ps2030/products_security_notice09186a0080624a37.html","hostname":"www.cisco.com","tags":["X Refsource CONFIRM"]},{"url":"http://lists.grok.org.uk/pipermail/full-disclosure/2005-November/038983.html","label":"lists.grok.org.uk/pipermail/full-disclosure/2005-November/038983.html","hostname":"lists.grok.org.uk","tags":["Mailing List","X Refsource FULLDISC"]},{"url":"http://www.securityfocus.com/archive/1/426989/100/0/threaded","label":"www.securityfocus.com/archive/1/426989/100/0/threaded","hostname":"www.securityfocus.com","tags":["Mailing List","X Refsource BUGTRAQ"]},{"url":"http://www.cisco.com/warp/public/707/cisco-response-20051122-pix.shtml","label":"www.cisco.com/warp/public/707/cisco-response-20051122-pix.shtml","hostname":"www.cisco.com","tags":["Vendor Advisory","X Refsource CISCO"]},{"url":"http://www.securityfocus.com/archive/1/426991/100/0/threaded","label":"www.securityfocus.com/archive/1/426991/100/0/threaded","hostname":"www.securityfocus.com","tags":["Mailing List","X Refsource BUGTRAQ"]},{"url":"http://www.kb.cert.org/vuls/id/853540","label":"www.kb.cert.org/vuls/id/853540","hostname":"www.kb.cert.org","tags":["Third Party Advisory","X Refsource CERT VN","US Government Resource"]},{"url":"http://secunia.com/advisories/17670","label":"secunia.com/advisories/17670","hostname":"secunia.com","tags":["Third Party Advisory","X Refsource SECUNIA"]},{"url":"http://www.securityfocus.com/archive/1/427041/100/0/threaded","label":"www.securityfocus.com/archive/1/427041/100/0/threaded","hostname":"www.securityfocus.com","tags":["Mailing List","X Refsource BUGTRAQ"]},{"url":"http://www.vupen.com/english/advisories/2005/2546","label":"www.vupen.com/english/advisories/2005/2546","hostname":"www.vupen.com","tags":["VDB Entry","X Refsource VUPEN"]},{"url":"http://www.securityfocus.com/archive/1/417458/30/0/threaded","label":"www.securityfocus.com/archive/1/417458/30/0/threaded","hostname":"www.securityfocus.com","tags":["Mailing List","X Refsource BUGTRAQ"]},{"url":"http://lists.grok.org.uk/pipermail/full-disclosure/2005-November/038971.html","label":"lists.grok.org.uk/pipermail/full-disclosure/2005-November/038971.html","hostname":"lists.grok.org.uk","tags":["Mailing List","X Refsource FULLDISC","Vendor Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2005-11-23T00:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-07T23:24:36.214Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":34,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-22T14:47:15.864Z","stale":false,"partial":false}}