CVE-2020-1626

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

HIGH
7.5
CVSS Score
Published: April 8, 2020 at 07:25 PM UTC
Updated: June 17, 2026 at 03:02 AM UTC
2 products affected across 2 vendorsJunos OS EvolvedJunos OS Evolved

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Severity
HIGH7.5
Exploit prediction
EPSS 1%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 19.1R1-EVO
Affected range stops below 19.1R1-EVO, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_CONFIRMVendor Advisory
https://kb.juniper.net/JSA11005
x_refsource_MISCThird Party Advisory
https://tools.ietf.org/html/rfc6192

CVSS

7.5HIGHjuniper
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfo

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