CVE-2020-4023 : Security Advisory and Response
Learn about CVE-2020-4023 affecting Atlassian Fisheye and Crucible before version 4.8.2, allowing remote attackers to execute XSS attacks. Find mitigation steps and long-term security practices here.
Atlassian Crucible and Fisheye before version 4.8.2 are affected by a Cross Site Scripting (XSS) vulnerability that allows remote attackers to inject arbitrary HTML or Javascript.
Understanding CVE-2020-4023
This CVE involves a security issue in Atlassian Fisheye and Crucible that could be exploited by attackers to execute XSS attacks.
What is CVE-2020-4023?
The vulnerability in Atlassian Fisheye and Crucible before version 4.8.2 enables malicious actors to insert unauthorized HTML or Javascript code through a specific parameter, potentially leading to XSS attacks.
The Impact of CVE-2020-4023
The presence of this vulnerability allows remote attackers to manipulate the committerFilter parameter to inject malicious scripts, posing a risk of executing unauthorized code within the application.
Technical Details of CVE-2020-4023
This section provides more in-depth technical insights into the CVE.
Vulnerability Description
The review coverage resource in Atlassian Fisheye and Crucible before version 4.8.2 is susceptible to a Cross Site Scripting (XSS) vulnerability, enabling attackers to inject arbitrary HTML or Javascript code.
Affected Systems and Versions
- Product: Crucible
- Vendor: Atlassian
- Versions Affected: Less than 4.8.2
- Product: Fisheye
- Vendor: Atlassian
- Versions Affected: Less than 4.8.2
Exploitation Mechanism
Attackers can exploit the committerFilter parameter in Atlassian Fisheye and Crucible to inject malicious HTML or Javascript code, potentially leading to XSS attacks.
Mitigation and Prevention
Protecting systems from CVE-2020-4023 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Upgrade Atlassian Fisheye and Crucible to version 4.8.2 or higher to mitigate the vulnerability.
- Implement input validation mechanisms to sanitize user inputs and prevent XSS attacks.
Long-Term Security Practices
- Regularly monitor and audit web applications for security vulnerabilities.
- Educate developers and users on secure coding practices to prevent XSS vulnerabilities.
Patching and Updates
- Stay informed about security updates and patches released by Atlassian to address vulnerabilities like CVE-2020-4023.