Cisco IOS WebVPN and SSLVPN HTTPS denial of service

ios-sslvpn-https-dos (49425)

Medium Risk

Description:

Cisco IOS is vulnerable to a denial of service, caused by an error when the WebVPN or SSLVPN feature is enabled. By sending a specially-crafted HTTPS packet, a remote attacker could exploit this vulnerability to cause the device to hang or reload.

*CVSS:

Base Score:	7.8
Access Vector:	Network
Access Complexity:	Low
Authentication:	None
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	Complete
Temporal Score:	5.8
Exploitability:	Unproven
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Denial of Service

Remedy:

Refer to cisco-sa-20090325-webvpn for patch, upgrade or suggested workaround information. See References.

References:

• cisco-sa-20090325-webvpn: Cisco IOS Software WebVPN and SSLVPN Vulnerabilities.
• BID-34239: Cisco IOS WebVPN/SSLVPN Multiple Denial of Service Vulnerabilities
• CVE-2009-0626: The SSLVPN feature in Cisco IOS 12.3 through 12.4 allows remote attackers to cause a denial of service (device reload or hang) via a crafted HTTPS packet.
• OSVDB ID: 53130: Cisco IOS SSLVPN Feature Crafted HTTPS Packet Remote DoS
• SA34438: Cisco IOS Multiple Vulnerabilities
• SECTRACK ID: 1021896: Cisco IOS WebVPN and SSLVPN Bugs Let Remote Users Deny Service
• VUPEN/ADV-2009-0851: Cisco IOS Multiple Denial of Service and Privilege Escalation Issues

Platforms Affected:

• Cisco IOS 12.3

Reported:

Mar 25, 2009

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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