CVE-2024-39549

/// Technical description

A Missing Release of Memory after Effective Lifetime vulnerability in the routing process daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an attacker to send a malformed BGP Path attribute update which allocates memory used to log the bad path attribute. This memory is not properly freed in all circumstances, leading to a Denial of Service (DoS).

Consumed memory can be freed by manually restarting Routing Protocol Daemon (rpd).

Memory utilization could be monitored by: 

user@host> show system memory or show system monitor memory status

This issue affects:

Junos OS:  * All versions before 21.2R3-S8, 

* from 21.4 before 21.4R3-S8,

* from 22.2 before 22.2R3-S4, 

* from 22.3 before 22.3R3-S3, 

* from 22.4 before 22.4R3-S3,

* from 23.2 before 23.2R2-S1, 

* from 23.4 before 23.4R1-S2, 23.4R2.

Junos OS Evolved:

* All versions before 21.2R3-S8-EVO,

* from 21.4 before 21.4R3-S8-EVO,

* from 22.2 before 22.2R3-S4-EVO,

* from 22.3 befo

/// 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