CVE-2017-20146 Explained : Impact and Mitigation
Learn about CVE-2017-20146 involving improper CORS headers in github.com/gorilla/handlers, enabling unauthorized manipulation and access. Find mitigation steps and version updates.
CVE-2017-20146 relates to improper access control in github.com/gorilla/handlers, potentially allowing manipulation of CORS headers.
Understanding CVE-2017-20146
What is CVE-2017-20146?
This CVE involves the improper application of CORS headers in the CORS handler, which could enable a requester to manipulate the Access-Control-Allow-Origin header, bypassing the Same Origin Policy.
The Impact of CVE-2017-20146
This vulnerability could lead to unauthorized access and potential security breaches by allowing attackers to manipulate CORS headers.
Technical Details of CVE-2017-20146
Vulnerability Description
- CWE 284: Improper Access Control
Affected Systems and Versions
- Vendor: github.com/gorilla/handlers
- Product: github.com/gorilla/handlers
- Versions Affected: 0 to 1.3.0 (exclusive)
- Program Routine: cors.ServeHTTP
Exploitation Mechanism
The vulnerability allows attackers to manipulate CORS headers, potentially leading to unauthorized access and security risks.
Mitigation and Prevention
Immediate Steps to Take
- Update to a version higher than 1.3.0 to mitigate the vulnerability.
- Review and adjust CORS header settings to prevent unauthorized manipulation.
Long-Term Security Practices
- Regularly review and update CORS header configurations.
- Implement strict access control policies to prevent unauthorized access.
Patching and Updates
- Apply patches and updates provided by github.com/gorilla/handlers to address the vulnerability.