CVE-2019-11930 : What You Need to Know
Learn about CVE-2019-11930, a critical vulnerability in HHVM versions before 3.30.12 and between 4.0.0 to 4.28.1 that could lead to application crashes or remote code execution. Find mitigation steps and patching details here.
A vulnerability in HHVM versions before 3.30.12 and between 4.0.0 to 4.28.1 could lead to a crash or remote code execution.
Understanding CVE-2019-11930
This CVE identifies a critical issue in HHVM that could potentially allow for remote code execution.
What is CVE-2019-11930?
The vulnerability arises from an invalid free in mb_detect_order, which may result in application crashes or enable attackers to execute remote code.
The Impact of CVE-2019-11930
The presence of this vulnerability could lead to severe consequences, including application crashes and unauthorized remote code execution.
Technical Details of CVE-2019-11930
This section delves into the specifics of the vulnerability.
Vulnerability Description
The flaw in HHVM versions prior to 3.30.12 and between 4.0.0 to 4.28.1 stems from an invalid free operation in mb_detect_order, posing a risk of application crashes and potential remote code execution.
Affected Systems and Versions
- HHVM versions before 3.30.12
- HHVM versions between 4.0.0 and 4.8.5
- HHVM versions between 4.9.0 and 4.23.1
- HHVM versions 4.24.0, 4.25.0, 4.26.0, 4.27.0, 4.28.0, and 4.28.1
Exploitation Mechanism
Attackers can exploit this vulnerability by triggering the invalid free operation in mb_detect_order, leading to application crashes or potential remote code execution.
Mitigation and Prevention
Protecting systems from CVE-2019-11930 is crucial to prevent exploitation and maintain security.
Immediate Steps to Take
- Apply patches provided by Facebook for affected HHVM versions.
- Monitor for any unusual activity that could indicate exploitation of the vulnerability.
- Consider restricting network access to vulnerable systems.
Long-Term Security Practices
- Regularly update HHVM to the latest secure versions.
- Conduct security audits and penetration testing to identify and address vulnerabilities.
- Educate developers and system administrators on secure coding practices.
Patching and Updates
- Facebook has released patches for the affected HHVM versions. Ensure timely application of these patches to mitigate the vulnerability.