CVE-2024-21609

/// Technical description

A Missing Release of Memory after Effective Lifetime vulnerability in the IKE daemon (iked) of Juniper Networks Junos OS on MX Series with SPC3, and SRX Series allows an administratively adjacent attacker which is able to successfully establish IPsec tunnels to cause a Denial of Service (DoS).

If specific values for the IPsec parameters local-ip, remote-ip, remote ike-id, and traffic selectors are sent from the peer, a memory leak occurs during every IPsec SA rekey which is carried out with a specific message sequence. This will eventually result in an iked process crash and restart.

The iked process memory consumption can be checked using the below command:

  user@host> show system processes extensive | grep iked

          PID USERNAME   PRI NICE   SIZE   RES   STATE   C TIME WCPU COMMAND

          56903 root       31   0     4016M 2543M CPU0   0 2:10 10.50% iked

This issue affects Juniper Networks Junos OS:

* All versions earlier than 20.4R3-S9;

* 2

/// 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