CVE-2019-1672: Cisco Web Security Appliance Decryption Policy Bypass Vulnerability
First published: Fri Feb 08 2019(Updated: )
A vulnerability in the Decryption Policy Default Action functionality of the Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to bypass a configured drop policy and allow traffic onto the network that should have been denied. The vulnerability is due to the incorrect handling of SSL-encrypted traffic when Decrypt for End-User Notification is disabled in the configuration. An attacker could exploit this vulnerability by sending a SSL connection through the affected device. A successful exploit could allow the attacker to bypass a configured drop policy to block specific SSL connections. Releases 10.1.x and 10.5.x are affected.
Credit: ykramarz@cisco.com ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Web Security Appliance | =10.1.0-204 | |
| Cisco Web Security Appliance | =10.5.2-072 | |
| Cisco Web Security Appliance | =11.5.1-fcs-115 | |
| =10.1.0-204 | ||
| =10.5.2-072 | ||
| =11.5.1-fcs-115 |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID for this Cisco Web Security Appliance vulnerability?
The vulnerability ID for this vulnerability is CVE-2019-1672.
What is the severity rating of CVE-2019-1672?
CVE-2019-1672 has a severity rating of 5.8 (medium).
Which versions of Cisco Web Security Appliance are affected by CVE-2019-1672?
Versions 10.1.0-204, 10.5.2-072, and 11.5.1-fcs-115 of Cisco Web Security Appliance are affected by CVE-2019-1672.
What is the impact of CVE-2019-1672?
This vulnerability allows an unauthenticated, remote attacker to bypass a configured drop policy and allow traffic onto the network that should have been denied.
How can I fix the vulnerability CVE-2019-1672?
Apply the necessary updates provided by Cisco to fix CVE-2019-1672.
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