CVE-2018-18497 : Vulnerability Insights and Analysis
Learn about CVE-2018-18497, a Firefox vulnerability allowing malicious WebExtensions to access privileged locations. Find mitigation steps and preventive measures here.
A vulnerability in Firefox versions prior to 64 could allow a malicious WebExtension to open privileged locations by bypassing URI restrictions.
Understanding CVE-2018-18497
This CVE involves a security issue in Firefox that enables WebExtensions to load arbitrary URLs using pipe separators, potentially leading to the opening of sensitive locations.
What is CVE-2018-18497?
The browser.windows.create API in Firefox imposes restrictions on WebExtensions' URIs. However, a flaw allows extensions to bypass these limitations by using a pipe in the URL field, enabling the loading of multiple pages as a single argument. This loophole could empower a malicious WebExtension to access privileged about: or file: locations.
The Impact of CVE-2018-18497
The vulnerability in Firefox versions before 64 poses a risk of unauthorized access to sensitive browser locations, potentially compromising user data and system security.
Technical Details of CVE-2018-18497
This section delves into the specifics of the vulnerability.
Vulnerability Description
The flaw in Firefox versions below 64 allows WebExtensions to circumvent URI restrictions, potentially leading to the opening of privileged locations.
Affected Systems and Versions
- Product: Firefox
- Vendor: Mozilla
- Versions Affected: < 64
Exploitation Mechanism
The vulnerability can be exploited by utilizing a pipe in the URL field of a WebExtension to load multiple pages as a single argument, enabling access to sensitive browser locations.
Mitigation and Prevention
Protecting systems from CVE-2018-18497 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update Firefox to version 64 or above to mitigate the vulnerability.
- Disable or remove any suspicious or untrusted WebExtensions.
Long-Term Security Practices
- Regularly monitor and update browser extensions to ensure security.
- Educate users on safe browsing practices and extension permissions.
Patching and Updates
Mozilla may release patches or updates to address CVE-2018-18497. Stay informed about security advisories and apply patches promptly.