CVE-2018-5164 : Exploit Details and Defense Strategies
Learn about CVE-2018-5164, a vulnerability in Firefox versions before 60 allowing script execution despite Content Security Policy (CSP), leading to potential XSS attacks.
A vulnerability in Firefox versions prior to 60 could allow for the execution of scripts despite Content Security Policy (CSP) blocking, potentially leading to cross-site scripting (XSS) attacks.
Understanding CVE-2018-5164
This CVE involves a failure to correctly apply CSP to all parts of multipart content sent with the "multipart/x-mixed-replace" MIME type, enabling script execution where CSP should block it.
What is CVE-2018-5164?
The vulnerability in Firefox versions before 60 allows for the execution of scripts despite CSP, exposing systems to XSS and other attacks.
The Impact of CVE-2018-5164
The vulnerability poses a risk of potential cross-site scripting (XSS) attacks and other security threats due to the incorrect application of Content Security Policy (CSP) in Firefox versions prior to 60.
Technical Details of CVE-2018-5164
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The correct application of Content Security Policy (CSP) is not observed for all components of multipart content sent using the "multipart/x-mixed-replace" MIME type, allowing for script execution despite CSP's intended blocking function.
Affected Systems and Versions
- Product: Firefox
- Vendor: Mozilla
- Versions Affected: < 60
- Version Type: Custom
Exploitation Mechanism
The vulnerability arises from the failure to apply CSP correctly to all parts of multipart content sent with the "multipart/x-mixed-replace" MIME type, enabling script execution.
Mitigation and Prevention
Protecting systems from CVE-2018-5164 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update Firefox to version 60 or above to mitigate the vulnerability.
- Implement strict CSP policies to prevent cross-site scripting attacks.
Long-Term Security Practices
- Regularly update browsers and apply security patches promptly.
- Educate users on safe browsing practices to minimize the risk of XSS attacks.
Patching and Updates
Ensure that all systems running Firefox are updated to version 60 or higher to address the vulnerability.