CVE-2019-18874 : Exploit Details and Defense Strategies
Learn about CVE-2019-18874, a vulnerability in the psutil library (python-psutil) up to version 5.6.5, leading to a double free issue. Find out the impact, affected systems, exploitation mechanism, and mitigation steps.
The psutil library, also known as python-psutil, versions up to 5.6.5, has a vulnerability that can result in a double free due to mishandling the reference count within a loop.
Understanding CVE-2019-18874
This CVE involves a vulnerability in the psutil library that can lead to a double free, potentially causing system instability or crashes.
What is CVE-2019-18874?
CVE-2019-18874 is a vulnerability in the psutil library, specifically versions up to 5.6.5. The issue arises from mishandling the reference count within a loop responsible for converting system data into a Python object.
The Impact of CVE-2019-18874
The vulnerability can be exploited to trigger a double free, potentially leading to system instability, crashes, or even remote code execution by malicious actors.
Technical Details of CVE-2019-18874
This section provides more in-depth technical information about the CVE.
Vulnerability Description
The vulnerability in psutil (python-psutil) up to version 5.6.5 results from refcount mishandling within a loop converting system data to a Python object, potentially causing a double free.
Affected Systems and Versions
- Product: psutil library (python-psutil)
- Vendor: N/A
- Versions affected: Up to 5.6.5
Exploitation Mechanism
The vulnerability is exploited by mishandling the reference count within a loop, allowing an attacker to potentially execute arbitrary code or disrupt system operations.
Mitigation and Prevention
Protecting systems from CVE-2019-18874 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update psutil library to a patched version that addresses the double free vulnerability.
- Monitor for any unusual system behavior that could indicate exploitation of the vulnerability.
Long-Term Security Practices
- Regularly update software libraries and dependencies to mitigate known vulnerabilities.
- Implement code reviews and testing procedures to catch similar issues in the future.
Patching and Updates
Ensure that all systems running the vulnerable psutil library are promptly patched with the latest updates to prevent exploitation of the double free vulnerability.