CVE-2020-1626

Junos OS Evolved: Denial of Service vulnerability in processing high rate of specific packets

Description

A vulnerability in Juniper Networks Junos OS Evolved may allow an attacker to cause a Denial of Service (DoS) by sending a high rate of specific packets to the device, resulting in a pfemand process crash. The pfemand process is responsible for packet forwarding on the device. By continuously sending the packet flood, an attacker can repeatedly crash the pfemand process causing a sustained Denial of Service. This issue can only be triggered by traffic sent to the device. Transit traffic does not cause this issue. This issue affects all version of Junos OS Evolved prior to 19.1R1-EVO.

Remediation

Solution:

The following software releases have been updated to resolve this specific issue: 19.1R1-EVO, 19.2R1-EVO, 19.3R1-EVO, and all subsequent releases.

Workaround:

Use access lists or firewall filters to limit access to the device to known TCP and UDP ports, and only from trusted, administrative networks or hosts.

7.5

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.47%

Vendor Advisory juniper.net

Affected: Juniper Networks Junos OS Evolved

References

Link	Tags
https://tools.ietf.org/html/rfc6192	third party advisory
https://kb.juniper.net/JSA11005	vendor advisory

Frequently Asked Questions

What is the severity of CVE-2020-1626?: CVE-2020-1626 has been scored as a high severity vulnerability.
How to fix CVE-2020-1626?: To fix CVE-2020-1626: The following software releases have been updated to resolve this specific issue: 19.1R1-EVO, 19.2R1-EVO, 19.3R1-EVO, and all subsequent releases.
Is CVE-2020-1626 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2020-1626 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-1626?: CVE-2020-1626 affects Juniper Networks Junos OS Evolved.

This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.