CVE-2020-1651 Explained : Impact and Mitigation
Discover the impact of CVE-2020-1651, a vulnerability in Juniper Networks MX Series on Junos OS. Learn about affected systems, versions, and mitigation steps to address this security issue.
This CVE-2020-1651 article provides detailed insights into a vulnerability impacting Juniper Networks MX Series on Junos OS. Find out about the vulnerability's impact, technical details, mitigation, and prevention methods.
Understanding CVE-2020-1651
A memory leak issue in Juniper Networks MX Series may lead to the crash and restart of the packet forwarding engine (PFE) on the line card, causing a Denial of Service (DoS) condition.
What is CVE-2020-1651?
CVE-2020-1651 refers to a vulnerability in Juniper Networks MX Series where receiving specific Layer 2 frames triggers a memory leak, resulting in PFE crashes and restarts, leading to traffic interruptions.
The Impact of CVE-2020-1651
- The vulnerability allows an attacker on the same broadcast domain to repeatedly crash the PFE, causing extended DoS attacks.
Technical Details of CVE-2020-1651
The CVE-2020-1651 vulnerability offers the following technical insights:
Vulnerability Description
- Continuously sending specific Layer 2 frames triggers a memory leak in Juniper MX Series, leading to PFE crashes and restarts.
Affected Systems and Versions
- Junos OS versions 17.2R1 to 18.1R2 on MX Series are affected, with specific versions detailed for different releases.
Exploitation Mechanism
- No known malicious exploitation reported by Juniper SIRT regarding this vulnerability.
Mitigation and Prevention
In response to CVE-2020-1651, consider the following mitigation strategies:
Immediate Steps to Take
- Update to the following software releases: 17.2R3-S4, 17.2X75-D105.19, 17.3R3-S7, 17.4R1-S3, 17.4R2, 18.1R2, 18.2R1, 18.2X75-D10, or later versions.
Long-Term Security Practices
- Regularly monitor and update Junos OS to ensure the latest security patches are in place.
- Implement network segmentation to limit the broadcast domain exposure.
- Conduct regular security audits and assessments.
Patching and Updates
- Refer to the provided solution link from Juniper Networks for the updated software releases addressing the vulnerability.