Security restrictions bypass in Cisco Web Security Appliance - CVE-2019-1672
Published: February 7, 2019
Vulnerability identifier: #VU17427
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2019-1672
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Cisco Systems, Inc
Affected software:
Cisco Web Security Appliance
Cisco Web Security Appliance
Detailed vulnerability description
The vulnerability allows a remote attacker to bypass security restrictions on the system.
The vulnerability exists in the Decryption Policy Default Action functionality due to the incorrect handling of SSL-encrypted traffic when Decrypt for End-User Notification is disabled in the configuration. A remote attacker can send a SSL connection through the affected device to bypass a configured drop policy to block specific SSL connections and allow traffic onto the network that should have been denied.
How to mitigate CVE-2019-1672
Install updates from vendor's website.