CVE-2010-4354

Name of the Vulnerable Software and Affected Versions Cisco Adaptive Security Appliances (ASA) 5500 series devices (affected versions not specified) Cisco PIX Security Appliances 500 series devices (affected versions not specified) Cisco VPN Concentrators 3000 series devices (affected versions not specified)

Description The issue concerns the remote-access IPSec VPN implementation, which responds to an Aggressive Mode IKE Phase I message only when the group name is configured on the device. This allows remote attackers to enumerate valid group names via a series of IKE negotiation attempts. The vulnerability could allow an unauthenticated, remote attacker to gain access to sensitive information.

Recommendations For Cisco Adaptive Security Appliances (ASA) 5500 series devices, restrict access to the IKE negotiation process until a fix is available. For Cisco PIX Security Appliances 500 series devices, consider disabling the Aggressive Mode IKE Phase I message handling until a patch is available. For Cisco VPN Concentrators 3000 series devices, avoid using the group name configuration in the IKE negotiation process until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.