CVE-2017-5456 Explained : Impact and Mitigation
Learn about CVE-2017-5456, a vulnerability allowing unauthorized read and write access to the local file system in Firefox ESR and Firefox. Find mitigation steps and preventive measures here.
A method of circumventing the security measures in the sandbox has been observed, allowing unauthorized read and write operations on the local file system in Firefox ESR and Firefox.
Understanding CVE-2017-5456
A vulnerability that enables bypassing file system access protections in the sandbox, leading to unauthorized local file system access.
What is CVE-2017-5456?
This vulnerability allows for unauthorized read and write access to the local file system by exploiting the file system request constructor via an IPC message in Firefox ESR versions earlier than 52.1 and Firefox versions preceding 53.
The Impact of CVE-2017-5456
- Attackers can circumvent sandbox security measures, gaining unauthorized access to the local file system.
- This can lead to potential data theft, manipulation, or unauthorized system modifications.
Technical Details of CVE-2017-5456
A vulnerability that allows unauthorized access to the local file system by bypassing sandbox protections.
Vulnerability Description
- Exploits the file system request constructor via an IPC message to bypass security measures.
- Permits unauthorized read and write operations on the local file system.
Affected Systems and Versions
- Firefox ESR versions earlier than 52.1.
- Firefox versions preceding 53.
Exploitation Mechanism
- By exploiting the file system request constructor via an IPC message.
- Allows unauthorized read and write operations on the local file system.
Mitigation and Prevention
Steps to address and prevent the CVE-2017-5456 vulnerability.
Immediate Steps to Take
- Update Firefox ESR to version 52.1 or later.
- Update Firefox to version 53 or later.
- Monitor for any unauthorized file system access.
Long-Term Security Practices
- Regularly update browsers and security patches.
- Implement sandboxing and access control mechanisms.
- Educate users on safe browsing practices.
Patching and Updates
- Apply security patches provided by Mozilla promptly.
- Stay informed about security advisories and updates from Mozilla.