CVE-2020-1627 : Vulnerability Insights and Analysis
Discover the impact of CVE-2020-1627, a critical Denial of Service vulnerability in Juniper Networks Junos OS affecting vMX and MX150 devices. Learn about the affected systems and versions, exploitation mechanism, and mitigation steps.
A vulnerability in Juniper Networks Junos OS on vMX and MX150 devices may allow an attacker to cause a Denial of Service (DoS) by sending specific packets requiring special processing. This could lead to the riot forwarding daemon crashing, resulting in a sustained Denial of Service situation.
Understanding CVE-2020-1627
This CVE ID highlights a critical vulnerability within Juniper Networks Junos OS affecting vMX and MX150 devices.
What is CVE-2020-1627?
- The vulnerability allows an attacker to trigger a Denial of Service by sending specific packets that overwhelm the flow cache, causing the riot forwarding daemon to crash.
- Transit traffic does not trigger the issue, which is exclusive to traffic directed at the affected device.
The Impact of CVE-2020-1627
- Severity: High with a CVSS base score of 7.5
- Attack Vector: Network
- Availability Impact: High
Technical Details of CVE-2020-1627
The following provides detailed insights into the technical aspects of the vulnerability.
Vulnerability Description
- Specific packets requiring special processing can overwhelm the flow cache, leading to a sustained Denial of Service by crashing the riot forwarding daemon.
Affected Systems and Versions
- Junos OS versions 18.1 to 19.1 on vMX and MX150 devices are affected.
- Specifically, versions 18.1R3, 18.2R3, 18.2X75-D60, 18.3R3, 18.4R2, and 19.1R2 are vulnerable.
Exploitation Mechanism
- Malicious actors can exploit this vulnerability by continuously sending specific packets to crash the riot process.
Mitigation and Prevention
Understanding the steps to mitigate and prevent the CVE is crucial for ensuring system security.
Immediate Steps to Take
- Implement the provided software releases to address the vulnerability, including versions 18.1R3, 18.2R3, 18.2X75-D60, 18.3R3, 18.4R2, and 19.1R2.
- Regularly monitor and analyze network traffic for any unusual patterns.
Long-Term Security Practices
- Conduct regular security audits and assessments to identify vulnerabilities proactively.
- Keep the Junos OS up to date with the latest patches and updates to mitigate potential risks.
Patching and Updates
- Apply updates from Juniper Networks for version 18.1R3, 18.2R3, 18.2X75-D60, 18.3R3, 18.4R2, 19.1R2, 19.2R1, 19.3R1, and subsequent releases.