Protection Mechanism Failure in Junos OS and Junos OS Evolved - CVE-2021-31362

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Main Vulnerability Database Vulnerabilities #VU57438

Protection Mechanism Failure in Junos OS and Junos OS Evolved - CVE-2021-31362

Published: October 19, 2021


Vulnerability identifier: #VU57438
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-31362
CWE-ID: CWE-693
Exploitation vector: Adjecent network
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to insufficient implementation of security measures in RPD (routing protocol daemon). A remote attacker on the local network can bypass implemented security restrictions and perform a denial of service (DoS) attack.


Affected software

Junos OS
Junos OS Evolved

How to mitigate CVE-2021-31362

Install updates from vendor's website.

Junos OS - addressed in versions 18.2R3-S8, 18.3R3-S5, 18.4R3-S9, 19.1R3-S7, 19.2R1-S7, 19.2R3-S3, 19.3R2-S6, 19.3R3-S2, 19.4R3-S3, 20.1R3, 20.2R3, 20.3R3, 20.4R2, 21.1R1
Junos OS Evolved - addressed in versions 20.4R2-EVO, 21.1R2-EVO, 21.2R1-EVO

External References

Related Security Bulletins