CVE-2021-1566 — Cisco Email Security Appliance and Cisco Web Security Appliance Certificate Validation Vulnerability

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Cisco / Cisco Web Security Appliance (WSA)	affected n/a

CWE

CWE-296

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-wsa-cert-vali-n8L97RW

ADP enrichment

CVE

No English description supplied.

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-wsa-cert-vali-n8L97RW

CISA-ADP

No English description supplied.

No references supplied.