CVE-2020-35498 : Security Advisory and Response
Learn about CVE-2020-35498, a vulnerability in openvswitch that could lead to a denial of service attack. Find out affected versions, exploitation details, and mitigation steps.
A vulnerability in openvswitch could allow a malicious user to cause a denial of service by sending a specially crafted packet.
Understanding CVE-2020-35498
What is CVE-2020-35498?
The vulnerability in openvswitch arises from a limitation in userspace packet parsing, potentially leading to a denial of service attack.
The Impact of CVE-2020-35498
The primary risk posed by this vulnerability is to system availability.
Technical Details of CVE-2020-35498
Vulnerability Description
The vulnerability allows a malicious user to send a specially crafted packet, causing the resulting megaflow in the kernel to be too wide, potentially leading to a denial of service.
Affected Systems and Versions
- Vendor: n/a
- Product: openvswitch
- Versions affected: openvswitch 2.5.12, 2.6.10, 2.7.13, 2.8.11, 2.9.9, 2.10.7, 2.11.6, 2.12.3, 2.13.3, 2.14.2
Exploitation Mechanism
The vulnerability can be exploited by a malicious user sending a specially crafted packet to the system.
Mitigation and Prevention
Immediate Steps to Take
- Apply the patches provided by the vendor to address the vulnerability.
- Monitor network traffic for any signs of exploitation.
Long-Term Security Practices
- Regularly update and patch all software and systems to prevent vulnerabilities.
- Implement network segmentation and access controls to limit the impact of potential attacks.
- Conduct regular security audits and assessments to identify and address any security gaps.
- Stay informed about security advisories and updates from relevant vendors.
Patching and Updates
Ensure that all affected systems are updated with the latest patches and security updates.