CVE-2019-1672 : Vulnerability Insights and Analysis
Learn about CVE-2019-1672, a vulnerability in Cisco Web Security Appliance (WSA) allowing attackers to bypass security policies. Find mitigation steps and preventive measures here.
A weakness in the Decryption Policy Default Action feature of the Cisco Web Security Appliance (WSA) allows unauthorized attackers to bypass drop policies and permit prohibited network traffic. This vulnerability affects versions 10.1.x and 10.5.x.
Understanding CVE-2019-1672
This CVE involves a vulnerability in the Cisco Web Security Appliance (WSA) that could be exploited by attackers to bypass security policies.
What is CVE-2019-1672?
The vulnerability in the Decryption Policy Default Action feature of Cisco WSA enables attackers to evade drop policies and allow restricted network traffic, stemming from incorrect SSL-encrypted traffic handling.
The Impact of CVE-2019-1672
The vulnerability could lead to unauthorized traffic bypassing security measures, potentially compromising network integrity.
Technical Details of CVE-2019-1672
This section delves into the technical aspects of the vulnerability.
Vulnerability Description
The vulnerability arises from the incorrect treatment of SSL-encrypted traffic when Decrypt for End-User Notification is disabled, allowing attackers to transmit SSL connections through the affected device.
Affected Systems and Versions
- Product: Cisco Web Security Appliance (WSA)
- Versions: 10.1, 10.5
Exploitation Mechanism
Attackers can exploit the vulnerability by sending SSL connections through the affected device, bypassing drop policies and permitting specific SSL connections.
Mitigation and Prevention
Protecting systems from CVE-2019-1672 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply vendor-provided patches promptly
- Monitor network traffic for any suspicious activity
- Implement additional security measures to mitigate risks
Long-Term Security Practices
- Regularly update and patch all software and firmware
- Conduct security audits and assessments periodically
- Educate users on security best practices to prevent social engineering attacks
Patching and Updates
Ensure timely installation of security patches and updates provided by Cisco to address the vulnerability.