CVE-2020-3117 : Vulnerability Insights and Analysis

A vulnerability in the API Framework of Cisco AsyncOS for Cisco Web Security Appliance (WSA) and Cisco Content Security Management Appliance (SMA) could allow an unauthenticated, remote attacker to inject crafted HTTP headers in the web server's response.

Understanding CVE-2020-3117

This CVE involves a security vulnerability in Cisco Web Security Appliance and Cisco Content Security Management Appliance that could be exploited by an attacker to inject malicious HTTP headers.

What is CVE-2020-3117?

The vulnerability allows an attacker to inject crafted HTTP headers into valid HTTP responses by exploiting insufficient validation of user input in the API Framework of the affected Cisco appliances.

The Impact of CVE-2020-3117

If successfully exploited, an attacker could inject arbitrary HTTP headers into legitimate responses sent to a user's browser, potentially leading to further attacks or unauthorized actions.

Technical Details of CVE-2020-3117

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability arises from inadequate validation of user input in the API Framework of Cisco AsyncOS for Cisco Web Security Appliance and Cisco Content Security Management Appliance.

Affected Systems and Versions

Product: Cisco Web Security Appliance (WSA)
Vendor: Cisco
Versions affected: Not applicable (n/a)

Exploitation Mechanism

An unauthenticated, remote attacker can exploit the vulnerability by convincing a user to access a specially crafted URL, leading to the injection of malicious HTTP headers into the server's response.

Mitigation and Prevention

Protecting systems from this vulnerability requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security patches provided by Cisco promptly.
Monitor for any unusual HTTP header injections.

Long-Term Security Practices

Regularly update and patch all software and firmware.
Educate users about the risks of clicking on suspicious links.

Patching and Updates

Cisco has released patches to address this vulnerability. Ensure all affected systems are updated with the latest security fixes.