Main Vulnerability Database Vulnerabilities #VU57412

Infinite loop in Junos OS and Junos OS Evolved - CVE-2021-31363

Published: October 18, 2021

Vulnerability identifier: #VU57412

CSH Severity: Low

CVSS v4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-31363

CWE-ID: CWE-835

Exploitation vector: Adjecent network

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop in the routing protocol daemon (RPD). A remote attacker on the local network can consume all available system resources and cause denial of service conditions.

Affected software

Junos OS
Junos OS Evolved

How to mitigate CVE-2021-31363

Install updates from vendor's website.

Junos OS - addressed in versions 19.2R3-S3, 19.3R2-S6, 19.3R3-S2, 19.4R1-S4, 19.4R2-S4, 19.4R3-S2, 20.1R2-S1, 20.1R3, 20.2R2-S1, 20.2R3, 20.3R1-S2, 20.3R2, 20.4R1
Junos OS Evolved - addressed in versions 20.1R2-S3-EVO, 20.3R1-S2-EVO, 20.4R1-EVO

External References

https://kb.juniper.net/InfoCenter/index?page=content&id=JSA11225&cat=SIRT_1&actp=LIST

Related Security Bulletins