CVE-2018-16983 : Security Advisory and Response

NoScript Classic before version 5.1.8.7, as utilized in Tor Browser 7.x and similar products, contains a vulnerability that allows attackers to bypass script blocking mechanisms.

Understanding CVE-2018-16983

NoScript Classic versions prior to 5.1.8.7 are susceptible to exploitation, enabling attackers to circumvent script blocking by manipulating the Content-Type value.

What is CVE-2018-16983?

The vulnerability in NoScript Classic versions before 5.1.8.7 permits attackers to bypass script blocking by utilizing the Content-Type value of text/html;/json.

The Impact of CVE-2018-16983

This vulnerability can be exploited by malicious actors to execute scripts that would typically be blocked, potentially leading to unauthorized access or other security breaches.

Technical Details of CVE-2018-16983

NoScript Classic before version 5.1.8.7, as used in Tor Browser 7.x and other products, allows attackers to bypass script blocking via the text/html;/json Content-Type value.

Vulnerability Description

Attackers can exploit this vulnerability to bypass the blocking of scripts by manipulating the Content-Type value.

Affected Systems and Versions

NoScript Classic versions prior to 5.1.8.7
Tor Browser 7.x and similar products

Exploitation Mechanism

Attackers manipulate the Content-Type value to execute scripts that would typically be blocked.

Mitigation and Prevention

Immediate Steps to Take:

Update to NoScript Classic version 5.1.8.7 or later.
Consider using alternative script-blocking mechanisms if available. Long-Term Security Practices:
Regularly update software and applications to patch known vulnerabilities.
Implement network security measures to detect and prevent malicious activities.
Educate users on safe browsing practices and potential security risks.
Monitor security advisories for any new developments related to this vulnerability.
Consider using additional security tools or services to enhance protection.

Patching and Updates

Ensure all relevant software, including NoScript Classic and Tor Browser, is regularly updated to the latest versions to mitigate the risk of exploitation.