CVE-2018-12387 : Vulnerability Insights and Analysis
Learn about CVE-2018-12387, a security flaw in Firefox ESR < 60.2.2 and Firefox < 62.0.3 that exposes memory addresses, potentially leading to exploitation. Find out how to mitigate this vulnerability.
A security flaw has been discovered in Firefox versions Firefox ESR < 60.2.2 and Firefox < 62.0.3. The flaw is associated with the JavaScript JIT compiler, which inlines Array.prototype.push with multiple arguments, causing a memory address exposure vulnerability.
Understanding CVE-2018-12387
This CVE involves a vulnerability in Firefox versions that could potentially lead to memory address exposure and exploitation.
What is CVE-2018-12387?
The vulnerability in Firefox versions Firefox ESR < 60.2.2 and Firefox < 62.0.3 allows for the exposure of a memory address due to a flaw in the JavaScript JIT compiler.
The Impact of CVE-2018-12387
The vulnerability could be exploited within the sandboxed content process, potentially leading to security breaches and unauthorized access to sensitive information.
Technical Details of CVE-2018-12387
This section provides detailed technical information about the CVE.
Vulnerability Description
The flaw in the JavaScript JIT compiler in Firefox versions Firefox ESR < 60.2.2 and Firefox < 62.0.3 causes an offset of 8 bytes in the stack pointer after a bailout, inadvertently exposing a memory address to the calling function.
Affected Systems and Versions
- Product: Firefox ESR
- Vendor: Mozilla
- Versions Affected: < 60.2.2
- Product: Firefox
- Vendor: Mozilla
- Versions Affected: < 62.0.3
Exploitation Mechanism
The vulnerability occurs when the JavaScript JIT compiler inlines Array.prototype.push with multiple arguments, leading to a memory address exposure that can be exploited within the sandboxed content process.
Mitigation and Prevention
Protect your systems from CVE-2018-12387 with these mitigation strategies.
Immediate Steps to Take
- Update Firefox to versions 60.2.2 for ESR and 62.0.3 for the standard version to patch the vulnerability.
- Monitor security advisories from Mozilla and apply patches promptly.
Long-Term Security Practices
- Regularly update your web browser to the latest version to ensure you have the latest security patches.
- Implement sandboxing and other security measures to mitigate potential exploits.
Patching and Updates
- Stay informed about security updates and patches released by Mozilla for Firefox.
- Apply updates promptly to protect your system from known vulnerabilities.