CVE-2024-21611

/// Technical description

A Missing Release of Memory after Effective Lifetime vulnerability in the Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS).

In a Juniper Flow Monitoring (jflow) scenario route churn that causes BGP next hops to be updated will cause a slow memory leak and eventually a crash and restart of rpd.

Thread level memory utilization for the areas where the leak occurs can be checked using the below command:

user@host> show task memory detail | match so_in

so_in6 28 32 344450 11022400 344760 11032320

so_in 8 16 1841629 29466064 1841734 29467744

This issue affects:

Junos OS

* 21.4 versions earlier than 21.4R3;

* 22.1 versions earlier than 22.1R3;

* 22.2 versions earlier than 22.2R3.

Junos OS Evolved

* 21.4-EVO versions earlier than 21.4R3-EVO;

* 22.1-EVO versions earlier than 22.1R3-EVO;

* 22.2-EVO versions earlier than 22.2R3-EVO.

This issue do

/// 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