CVE-2024-39528

/// Technical description

A Use After Free vulnerability in the Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an authenticated, network-based attacker to cause a Denial of Service (DoS).On all Junos OS and Junos Evolved platforms, if a routing-instance deactivation is triggered, and at the same time a specific SNMP request is received, a segmentation fault occurs which causes rpd to crash and restart.

This issue affects:

   Junos OS:

* All versions before 21.2R3-S8, 

* 21.4 versions before 21.4R3-S5,

* 22.2 versions before 22.2R3-S3,

* 22.3 versions before 22.3R3-S2,

* 22.4 versions before 22.4R3,

* 23.2 versions before 23.2R2.

  Junos OS Evolved:

* All versions before 21.2R3-S8-EVO,

* 21.4-EVO versions before 21.4R3-S5-EVO,

* 22.2-EVO versions before 22.2R3-S3-EVO, 

* 22.3-EVO versions before 22.3R3-S2-EVO,

* 22.4-EVO versions before 22.4R3-EVO,

* 23.2-EVO versions before 23.2R2-EVO.

/// 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