CVE-2024-21598

/// Technical description

An Improper Validation of Syntactic Correctness of Input vulnerability in the Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a network-based, unauthenticated attacker to cause a Denial of Service (DoS).

If a BGP update is received over an established BGP session which contains a tunnel encapsulation attribute with a specifically malformed TLV, rpd will crash and restart.

This issue affects Juniper Networks

Junos OS:

* 20.4 versions 20.4R1 and later versions earlier than 20.4R3-S9;

* 21.2 versions earlier than 21.2R3-S7;

* 21.3 versions earlier than 21.3R3-S5;

* 21.4 versions earlier than 21.4R3-S5;

* 22.1 versions earlier than 22.1R3-S4;

* 22.2 versions earlier than 22.2R3-S3;

* 22.3 versions earlier than 22.3R3-S1;

* 22.4 versions earlier than 22.4R3;

* 23.2 versions earlier than 23.2R1-S2, 23.2R2;

Junos OS Evolved:

* 20.4-EVO versions 20.4R1-EVO and later versions earlier than 20.4R3-S9-EVO;

* 21.2-EVO vers

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References