A vulnerability in the Cisco Advanced Malware Protection (AMP) for Endpoints integration of Cisco AsyncOS for Cisco Email Security Appliance (ESA) and Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to intercept traffic between an affected device and the AMP servers. This vulnerability is due to improper certificate validation when an affected device establishes TLS connections. A man-in-the-middle attacker could exploit this vulnerability by sending a crafted TLS packet to an affected device. A successful exploit could allow the attacker to spoof a trusted host and then extract sensitive information or alter certain API requests.
Weakness
The product does not follow, or incorrectly follows, the chain of trust for a certificate back to a trusted root certificate.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Email_security_appliance | Cisco | - (including) | - (including) |
| Asyncos | Cisco | * | 12.5.3-035 (excluding) |
Extended Description
There are several ways in which the chain of trust might be broken, including but not limited to: