cisco-sa-esa-wsa-cert-vali-n8L97RW: Cisco??Email Security Appliance and Cisco Web Security Appliance Certificate Validation Vulnerability
First published: Wed Jun 16 2021(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
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco AsyncOS | =13.5<13.5.3-010=13.0<13.0.0-030=12.5<12.5.3-035>=.5<12<Migrate to 12.5.3-035 | 13.5.3-010 13.0.0-030 12.5.3-035 Migrate to 12.5.3-035 |
| Cisco AsyncOS | =12.5<12.5.1-043=12.0<12.0.3-005=11.8<11.8.3-021>=.8<11<Migrate to 11.8.3-021 | 12.5.1-043 12.0.3-005 11.8.3-021 Migrate to 11.8.3-021 |
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Reference Links
Frequently Asked Questions
What is the severity of Cisco sa-esa-wsa-cert-vali-n8L97RW?
The severity of Cisco sa-esa-wsa-cert-vali-n8L97RW is high with a score of 7.4.
What is the vulnerability in Cisco sa-esa-wsa-cert-vali-n8L97RW?
The vulnerability in Cisco sa-esa-wsa-cert-vali-n8L97RW is related to certificate validation 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), allowing an unauthenticated remote attacker to intercept traffic.
Which versions of Cisco AsyncOS are affected by Cisco sa-esa-wsa-cert-vali-n8L97RW?
Cisco AsyncOS versions 13.5 up to 13.5.3-010, 13.0 up to 13.0.0-030, 12.5 up to 12.5.3-035, and versions with a prefix of 12.5 are affected by Cisco sa-esa-wsa-cert-vali-n8L97RW.
How can I fix Cisco sa-esa-wsa-cert-vali-n8L97RW?
To fix Cisco sa-esa-wsa-cert-vali-n8L97RW, Cisco recommends upgrading to the specified fixed versions of AsyncOS or migrating to the recommended versions mentioned in the advisory.
Where can I find more information about Cisco sa-esa-wsa-cert-vali-n8L97RW?
You can find more information about Cisco sa-esa-wsa-cert-vali-n8L97RW in the [Cisco Security Advisory](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-wsa-cert-vali-n8L97RW).
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