CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:S/C:P/I:N/A:N
EPSS
Percentile
53.9%
A vulnerability in the authentication code of Cisco ASA Software could allow an authenticated, remote attacker to access resources of a VPN tunnel group.
The vulnerability is due to improper implementation of the tunnel group selection when a user authenticates to the remote access VPN via the challenge-response mechanism. This vulnerability may affect Cisco ASA configured to authenticate remote access VPN users via LDAP, RADIUS, TACACS+, and RSA if a challenge-response is needed for authentication. Cisco ASA Software configured for Clientless or AnyConnect SSL VPN is affected by this vulnerability.
An attacker could exploit this vulnerability by crafting a response to the Cisco ASA with a different tunnel group parameter. A successful exploit could allow the attacker to bypass the tunnel group restriction and authenticate to a different tunnel group than the one selected during the authentication phase. This could result in accessing a different set of resources.
Cisco has confirmed the vulnerability in a security notice and released software updates.
To exploit this vulnerability, an attacker must authenticate to the targeted device. This requirement would likely decrease the possibility of a successful exploit.
Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
Vendor | Product | Version | CPE |
---|---|---|---|
cisco | adaptive_security_appliance_software | 8.2 | cpe:2.3:o:cisco:adaptive_security_appliance_software:8.2:*:*:*:*:*:*:* |
cisco | adaptive_security_appliance_software | 8.3 | cpe:2.3:o:cisco:adaptive_security_appliance_software:8.3:*:*:*:*:*:*:* |
cisco | adaptive_security_appliance_software | 8.4 | cpe:2.3:o:cisco:adaptive_security_appliance_software:8.4:*:*:*:*:*:*:* |
cisco | adaptive_security_appliance_software | 8.6 | cpe:2.3:o:cisco:adaptive_security_appliance_software:8.6:*:*:*:*:*:*:* |
cisco | adaptive_security_appliance_software | 9.0 | cpe:2.3:o:cisco:adaptive_security_appliance_software:9.0:*:*:*:*:*:*:* |
cisco | adaptive_security_appliance_software | 9.1 | cpe:2.3:o:cisco:adaptive_security_appliance_software:9.1:*:*:*:*:*:*:* |
cisco | adaptive_security_appliance_software | 9.2 | cpe:2.3:o:cisco:adaptive_security_appliance_software:9.2:*:*:*:*:*:*:* |
cisco | adaptive_security_appliance_software | 8.2.0.45 | cpe:2.3:o:cisco:adaptive_security_appliance_software:8.2.0.45:*:*:*:*:*:*:* |
cisco | adaptive_security_appliance_software | 8.2.1 | cpe:2.3:o:cisco:adaptive_security_appliance_software:8.2.1:*:*:*:*:*:*:* |
cisco | adaptive_security_appliance_software | 8.2.2 | cpe:2.3:o:cisco:adaptive_security_appliance_software:8.2.2:*:*:*:*:*:*:* |