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Cisco��Email Security Appliance and Cisco Web Security Appliance Certificate Validation Vulnerability

cisco-sa-esa-wsa-cert-vali-n8L97RW · High · Published · Updated

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. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-wsa-cert-vali-n8L97RW

Workarounds

There are no workarounds that address this vulnerability.

CVEsCVE-2021-1566
Cisco Bug IDsCSCvw08342, CSCvw08378
CVSS ScoreBase 7.4
Base 7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:X/RL:X/RC:X
Product Names From Source
Cisco Secure Web Appliance, Cisco Secure Email

Related Products

Product CVE Evidence
Cisco Secure Email CVE-2021-1566 Cisco OpenVuln
Cisco Secure Web Appliance CVE-2021-1566 Cisco OpenVuln