CVE-2017-5455 : What You Need to Know
Learn about CVE-2017-5455 affecting Firefox ESR and Firefox versions, allowing unauthorized access and privilege escalation. Find mitigation steps and update recommendations here.
A security loophole in Firefox ESR and Firefox versions allowed unauthorized access and privilege escalation through internal feed reader APIs.
Understanding CVE-2017-5455
What is CVE-2017-5455?
The vulnerability stemmed from internal feed reader APIs breaching the sandbox barrier, potentially enabling unauthorized access and privilege escalation when combined with another exploit allowing remote code execution within the sandboxed process.
The Impact of CVE-2017-5455
The vulnerability affected Firefox ESR versions prior to 52.1 and Firefox versions prior to 53, posing a risk of unauthorized access and privilege escalation.
Technical Details of CVE-2017-5455
Vulnerability Description
The flaw allowed a sandbox escape and privilege escalation by exploiting internal feed reader APIs.
Affected Systems and Versions
- Product: Firefox ESR
- Vendor: Mozilla
- Versions Affected: < 52.1
- Product: Firefox
- Vendor: Mozilla
- Versions Affected: < 53
Exploitation Mechanism
The vulnerability could be exploited by combining the internal feed reader APIs with another vulnerability to execute code remotely within the sandboxed process.
Mitigation and Prevention
Immediate Steps to Take
- Update Firefox ESR to version 52.1 or later.
- Update Firefox to version 53 or later.
- Monitor vendor advisories for security patches.
Long-Term Security Practices
- Regularly update browsers and software to the latest versions.
- Implement security best practices to prevent unauthorized access.
Patching and Updates
Apply security patches and updates provided by Mozilla to address the vulnerability.