Cisco VPN 3000 series concentrators HTML interface denial of service
| cisco-vpn-html-interface-dos (10025) |  Low Risk |
Description:
Cisco VPN 3000 series concentrators are vulnerable to a denial of service attack, caused by a vulnerability in the handling of malformed HTML pages. A remote attacker could modify an HTML page by inserting an overly long username and password, which would cause the affected concentrator to reload when the malformed page is submitted.
Platforms Affected:
- Cisco, VPN 3000 Concentrator 2.0
- Cisco, VPN 3000 Concentrator 2.5.2.A
- Cisco, VPN 3000 Concentrator 2.5.2.B
- Cisco, VPN 3000 Concentrator 2.5.2.C
- Cisco, VPN 3000 Concentrator 2.5.2.D
- Cisco, VPN 3000 Concentrator 2.5.2.F
- Cisco, VPN 3000 Concentrator 3.0
- Cisco, VPN 3000 Concentrator 3.0(Rel)
- Cisco, VPN 3000 Concentrator 3.0.3.A
- Cisco, VPN 3000 Concentrator 3.0.3.B
- Cisco, VPN 3000 Concentrator 3.0.4
- Cisco, VPN 3000 Concentrator 3.1
- Cisco, VPN 3000 Concentrator 3.1(Rel)
- Cisco, VPN 3000 Concentrator 3.1.1
- Cisco, VPN 3000 Concentrator 3.1.2
- Cisco, VPN 3000 Concentrator 3.1.4
- Cisco, VPN 3000 Concentrator 3.5(Rel)
- Cisco, VPN 3000 Concentrator 3.5.1
- Cisco, VPN 3000 Concentrator 3.5.2
- Cisco, VPN 3002 Hardware Client
Remedy:
Upgrade to the latest software version for your device (3.6(Rel) or later) or (3.5.3 or later), as listed in Cisco Security Advisory: Cisco VPN 3000 Concentrator Multiple Vulnerabilities. See References.
Consequences:
Denial of Service
References:
- CIAC Information Bulletin M-119, Cisco VPN Concentrators and VPN 3002 Client Multiple Vulnerabilities at http://www.ciac.org/ciac/bulletins/m-119.shtml.
- vpn3k-multiple-vuln-pub, Cisco Security Advisory: Cisco VPN 3000 Concentrator Multiple Vulnerabilities at http://www.cisco.com/warp/public/707/vpn3k-multiple-vuln-pub.shtml.
- BID-5609: Multiple Cisco VPN 3000 Vulnerabilities
- BID-5617: Cisco VPN 3000 Series Concentrator Posted User Credential Denial Of Service Vulnerability
- CVE-2002-1100: 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.
Reported:
Sep 03, 2002
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