{"cve":{"cve_id":"CVE-2005-3774","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.18207,"epss_percentile":0.96836,"epss_as_of":"2026-06-23","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.","published_at":"2005-11-23T00:00:00Z","last_modified_at":"2026-06-16T22:17:36.003000Z","cvss_v3_score":null,"cvss_v3_vector":null,"cvss_v3_severity":null,"cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":null,"nvd_references":["http://securitytracker.com/id?1015256","https://exchange.xforce.ibmcloud.com/vulnerabilities/25079","https://exchange.xforce.ibmcloud.com/vulnerabilities/25077","http://www.osvdb.org/24140","http://www.securityfocus.com/bid/15525","http://www.cisco.com/en/US/products/hw/vpndevc/ps2030/products_security_notice09186a0080624a37.html","http://lists.grok.org.uk/pipermail/full-disclosure/2005-November/038983.html","http://www.securityfocus.com/archive/1/426989/100/0/threaded","http://www.cisco.com/warp/public/707/cisco-response-20051122-pix.shtml","http://www.securityfocus.com/archive/1/426991/100/0/threaded","http://www.kb.cert.org/vuls/id/853540","http://secunia.com/advisories/17670","http://www.securityfocus.com/archive/1/427041/100/0/threaded","http://www.vupen.com/english/advisories/2005/2546","http://www.securityfocus.com/archive/1/417458/30/0/threaded","http://lists.grok.org.uk/pipermail/full-disclosure/2005-November/038971.html"],"vuln_status":"Modified","trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-28T23:03:07.544661Z"},"effective_severity":null,"badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":null,"metrics":[]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"cisco","vendor_name":"Cisco","product_slug":"pix","product_name":"pix","version_start":"6.3","version_start_inclusive":true,"version_end":"6.3","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:h:cisco:pix:6.3:*:*:*:*:*:*:*"},{"vendor_slug":"cisco","vendor_name":"Cisco","product_slug":"pix","product_name":"pix","version_start":"7.0","version_start_inclusive":true,"version_end":"7.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:h:cisco:pix:7.0:*:*:*:*:*:*:*"}],"exploit_refs":[],"news":[],"references":[{"url":"http://securitytracker.com/id?1015256","source_type":"MISC","tags":[]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/25079","source_type":"MISC","tags":[]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/25077","source_type":"MISC","tags":[]},{"url":"http://www.osvdb.org/24140","source_type":"MISC","tags":[]},{"url":"http://www.securityfocus.com/bid/15525","source_type":"MISC","tags":[]},{"url":"http://www.cisco.com/en/US/products/hw/vpndevc/ps2030/products_security_notice09186a0080624a37.html","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"http://lists.grok.org.uk/pipermail/full-disclosure/2005-November/038983.html","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"http://www.securityfocus.com/archive/1/426989/100/0/threaded","source_type":"MISC","tags":[]},{"url":"http://www.cisco.com/warp/public/707/cisco-response-20051122-pix.shtml","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"http://www.securityfocus.com/archive/1/426991/100/0/threaded","source_type":"MISC","tags":[]},{"url":"http://www.kb.cert.org/vuls/id/853540","source_type":"MISC","tags":[]},{"url":"http://secunia.com/advisories/17670","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"http://www.securityfocus.com/archive/1/427041/100/0/threaded","source_type":"MISC","tags":[]},{"url":"http://www.vupen.com/english/advisories/2005/2546","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"http://www.securityfocus.com/archive/1/417458/30/0/threaded","source_type":"MISC","tags":[]},{"url":"http://lists.grok.org.uk/pipermail/full-disclosure/2005-November/038971.html","source_type":"MAILING_LIST","tags":["mailing-list"]}],"timeline":[{"type":"published","at":"2005-11-23T00:00:00Z","label":"CVE published","source":null}]}