CVE-2020-7693 : Security Advisory and Response

CVE-2020-7693, also known as Denial of Service (DoS), involves the incorrect handling of the Upgrade header in the sockjs package before version 0.3.20, leading to container crashes hosting sockjs apps.

Understanding CVE-2020-7693

This CVE highlights a vulnerability in the sockjs package that can be exploited to cause denial of service.

What is CVE-2020-7693?

The vulnerability stems from mishandling the Upgrade header with the value 'websocket,' resulting in container crashes for systems hosting sockjs applications.

The Impact of CVE-2020-7693

The vulnerability can be exploited to launch Denial of Service (DoS) attacks, potentially disrupting services and causing system unavailability.

Technical Details of CVE-2020-7693

This section delves into the technical aspects of the CVE.

Vulnerability Description

The vulnerability arises from the incorrect processing of the Upgrade header, specifically when it contains the value 'websocket,' leading to container crashes.

Affected Systems and Versions

Product: sockjs
Versions affected: Before 0.3.20

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Network
Privileges Required: None
Exploit Code Maturity: Proof of Concept
Impact: Medium

Mitigation and Prevention

Protecting systems from CVE-2020-7693 is crucial to maintaining security.

Immediate Steps to Take

Update sockjs to version 0.3.20 or higher to mitigate the vulnerability.
Monitor network traffic for any suspicious activity related to the exploitation of this vulnerability.

Long-Term Security Practices

Regularly update software packages and dependencies to address known vulnerabilities.
Implement network security measures to detect and prevent DoS attacks.

Patching and Updates

Apply official fixes and patches provided by the sockjs package maintainers to address the vulnerability effectively.