CVE-2005-3774

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.

• http://lists.grok.org.uk/pipermail/full-disclosure/2005-November/038971.htmlVendor Advisory
• http://lists.grok.org.uk/pipermail/full-disclosure/2005-November/038983.html
• http://secunia.com/advisories/17670
• http://securitytracker.com/id?1015256
• http://www.cisco.com/en/US/products/hw/vpndevc/ps2030/products_security_notice09186a0080624a37.html
• http://www.cisco.com/warp/public/707/cisco-response-20051122-pix.shtml
• http://www.kb.cert.org/vuls/id/853540US Government Resource
• http://www.osvdb.org/24140
• http://www.securityfocus.com/archive/1/417458/30/0/threaded
• http://www.securityfocus.com/archive/1/426989/100/0/threaded
• http://www.securityfocus.com/archive/1/426991/100/0/threaded
• http://www.securityfocus.com/archive/1/427041/100/0/threaded
• http://www.securityfocus.com/bid/15525
• http://www.vupen.com/english/advisories/2005/2546
• https://exchange.xforce.ibmcloud.com/vulnerabilities/25077
• https://exchange.xforce.ibmcloud.com/vulnerabilities/25079
• http://lists.grok.org.uk/pipermail/full-disclosure/2005-November/038971.htmlVendor Advisory
• http://lists.grok.org.uk/pipermail/full-disclosure/2005-November/038983.html
• http://secunia.com/advisories/17670
• http://securitytracker.com/id?1015256
• http://www.cisco.com/en/US/products/hw/vpndevc/ps2030/products_security_notice09186a0080624a37.html
• http://www.cisco.com/warp/public/707/cisco-response-20051122-pix.shtml
• http://www.kb.cert.org/vuls/id/853540US Government Resource
• http://www.osvdb.org/24140
• http://www.securityfocus.com/archive/1/417458/30/0/threaded
• http://www.securityfocus.com/archive/1/426989/100/0/threaded
• http://www.securityfocus.com/archive/1/426991/100/0/threaded
• http://www.securityfocus.com/archive/1/427041/100/0/threaded
• http://www.securityfocus.com/bid/15525
• http://www.vupen.com/english/advisories/2005/2546
• https://exchange.xforce.ibmcloud.com/vulnerabilities/25077
• https://exchange.xforce.ibmcloud.com/vulnerabilities/25079

Published

Nov 23, 2005

Last Modified

Jun 16, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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