
CVE-2002-1100
https://notcve.org/view.php?id=CVE-2002-1100
10 Sep 2002 — Cisco VPN 3000 Concentrator 2.2.x, and 3.x before 3.5.3, allows remote attackers to cause a denial of service (crash) via a long (1) username or (2) password to the HTML login interface. • http://www.cisco.com/warp/public/707/vpn3k-multiple-vuln-pub.shtml •

CVE-2002-1101 – Cisco VPN 3000 Series Concentrator Client - Authentication Denial of Service
https://notcve.org/view.php?id=CVE-2002-1101
10 Sep 2002 — Cisco VPN 3000 Concentrator 2.2.x, 3.6(Rel), and 3.x before 3.5.5, allows remote attackers to cause a denial of service via a long user name. • https://www.exploit-db.com/exploits/21770 •

CVE-2002-1103
https://notcve.org/view.php?id=CVE-2002-1103
10 Sep 2002 — Cisco VPN 3000 Concentrator 2.2.x, 3.6(Rel), and 3.x before 3.5.5, allows remote attackers to cause a denial of service via (1) malformed or (2) large ISAKMP packets. • http://www.cisco.com/warp/public/707/vpn3k-multiple-vuln-pub.shtml •

CVE-2001-0428
https://notcve.org/view.php?id=CVE-2001-0428
02 Jul 2001 — Cisco VPN 3000 series concentrators before 2.5.2(F) allow remote attackers to cause a denial of service via an IP packet with an invalid IP option. • http://www.cisco.com/warp/public/707/vpn3k-ipoptions-vuln-pub.shtml •