CVE-2018-6337 : Vulnerability Insights and Analysis
Learn about CVE-2018-6337 affecting HHVM and folly libraries, leading to repeated outcomes in child processes. Find mitigation steps and long-term security practices here.
A vulnerability affecting HHVM and folly libraries that could lead to repeated or similar outcomes in child processes due to buffer recycling.
Understanding CVE-2018-6337
This CVE involves the reuse of buffers in HHVM and folly libraries, impacting specific versions and potentially causing security issues.
What is CVE-2018-6337?
The buffer recycling in folly::secureRandom when fork() is invoked can result in duplicated or similar results in child processes, affecting HHVM versions prior to 3.26.3 and folly library versions between v2017.12.11.00 and v2018.08.09.00.
The Impact of CVE-2018-6337
The vulnerability could lead to security risks and potential data exposure due to the improper handling of sensitive data, impacting the affected versions of HHVM and folly libraries.
Technical Details of CVE-2018-6337
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The issue arises from the buffer reuse in folly::secureRandom during fork() calls, leading to repeated or similar outcomes in child processes.
Affected Systems and Versions
- HHVM versions earlier than 3.26.3
- folly library versions between v2017.12.11.00 and v2018.08.09.00
Exploitation Mechanism
The vulnerability occurs when the fork() function is invoked, causing the buffer used by folly::secureRandom to be recycled and potentially exposing sensitive data.
Mitigation and Prevention
Protecting systems from the CVE-2018-6337 vulnerability requires immediate actions and long-term security measures.
Immediate Steps to Take
- Update HHVM to version 3.26.3 or later to mitigate the vulnerability.
- Upgrade the folly library to a version beyond v2018.08.09.00 to address the issue.
Long-Term Security Practices
- Regularly monitor and update software libraries to prevent similar vulnerabilities.
- Implement secure coding practices to avoid buffer reuse and data exposure.
Patching and Updates
- Apply patches provided by Facebook for HHVM and folly libraries to fix the vulnerability and enhance system security.