CVE-2018-5157 : Vulnerability Insights and Analysis
Learn about CVE-2018-5157, a security flaw in Firefox ESR and Firefox versions prior to 60 that allows malicious websites to access restricted PDF files. Find mitigation steps and updates here.
A security vulnerability in Firefox ESR and Firefox versions prior to 60 could allow a malicious website to bypass same-origin protections in the PDF viewer, potentially accessing restricted PDF files.
Understanding CVE-2018-5157
What is CVE-2018-5157?
The vulnerability enables a harmful website to intercept messages intended for the PDF viewer, granting unauthorized access to PDF files.
The Impact of CVE-2018-5157
The security flaw affects Firefox ESR versions earlier than 52.8 and Firefox versions before 60, compromising the confidentiality of protected PDF files.
Technical Details of CVE-2018-5157
Vulnerability Description
The flaw allows a malicious site to bypass same-origin protections in the PDF viewer, potentially accessing PDF files restricted to authenticated users on other websites.
Affected Systems and Versions
- Firefox ESR versions less than 52.8
- Firefox versions less than 60
Exploitation Mechanism
The vulnerability can be exploited by a malicious website to intercept and access PDF files intended only for authenticated users on third-party sites.
Mitigation and Prevention
Immediate Steps to Take
- Update Firefox ESR to version 52.8 or later
- Update Firefox to version 60 or later
- Avoid visiting untrusted websites
Long-Term Security Practices
- Regularly update browsers and software
- Implement network security measures
Patching and Updates
Apply security patches provided by Mozilla to address the vulnerability.