CVE-2019-1817 : Vulnerability Insights and Analysis
Learn about CVE-2019-1817 affecting Cisco Web Security Appliance. Discover the impact, affected versions, and mitigation steps for this denial of service vulnerability.
Cisco Web Security Appliance has a vulnerability that could lead to a denial of service attack.
Understanding CVE-2019-1817
This CVE involves a weakness in the web proxy feature of Cisco Web Security Appliance, potentially allowing a DoS attack.
What is CVE-2019-1817?
The vulnerability in Cisco Web Security Appliance's web proxy feature could be exploited by a remote attacker to trigger a DoS situation by sending malformed HTTP or HTTPS requests.
The Impact of CVE-2019-1817
- CVSS Base Score: 8.6 (High)
- Attack Vector: Network
- Availability Impact: High
- The vulnerability could lead to a temporary DoS scenario by forcing a restart of the web proxy process.
Technical Details of CVE-2019-1817
The following technical details provide insight into the vulnerability and its implications.
Vulnerability Description
- The vulnerability stems from inadequate verification of incoming HTTP and HTTPS requests.
Affected Systems and Versions
- Affected Product: Cisco Web Security Appliance (WSA)
- Vulnerable Versions:
- Less than 11.5.2-020 (Custom Version)
- Less than 11.7.0-406 (Custom Version)
Exploitation Mechanism
- An unauthorized remote attacker can exploit the vulnerability by sending malformed HTTP or HTTPS requests to the affected device.
Mitigation and Prevention
Protecting systems from CVE-2019-1817 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply vendor-provided patches or updates to mitigate the vulnerability.
- Monitor network traffic for any suspicious activity targeting the web proxy feature.
Long-Term Security Practices
- Regularly update and patch all software and firmware to prevent known vulnerabilities.
- Implement network segmentation to limit the impact of potential attacks.
- Conduct regular security assessments and penetration testing to identify and address security gaps.
Patching and Updates
- Cisco may release patches or updates to address the vulnerability. Stay informed through official advisories and apply patches promptly.