CVE-2021-42384 : Exploit Details and Defense Strategies
Learn about CVE-2021-42384, a use-after-free vulnerability in Busybox's awk applet leading to denial of service and potential code execution. Find mitigation steps and affected versions here.
This CVE record involves a use-after-free vulnerability in Busybox's awk applet, potentially leading to denial of service and code execution.
Understanding CVE-2021-42384
What is CVE-2021-42384?
A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the handle_special function.
The Impact of CVE-2021-42384
This vulnerability could result in denial of service and potentially allow attackers to execute malicious code on affected systems.
Technical Details of CVE-2021-42384
Vulnerability Description
The vulnerability is caused by a use-after-free issue in Busybox's awk applet.
Affected Systems and Versions
- Vendor: busybox
- Product: busybox
- Affected Versions: unspecified, less than 1.34.0
Exploitation Mechanism
The vulnerability can be exploited by processing a specially crafted awk pattern in the handle_special function.
Mitigation and Prevention
Immediate Steps to Take
- Apply patches provided by the vendor immediately.
- Monitor for any unusual activities on the network.
- Restrict and monitor network traffic to and from affected systems.
Long-Term Security Practices
- Regularly update and patch software to protect against known vulnerabilities.
- Implement least privilege access controls to limit the impact of potential attacks.
Patching and Updates
- Ensure all systems are updated to a version of busybox equal to or greater than 1.34.0.