SB2024101023 - Denial of service in Junos OS Evolved MAC learning and move limits

Description

This security bulletin contains information about 1 security vulnerability.

1) Unimplemented or Unsupported Feature in UI (CVE-ID: CVE-2024-47498)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to incorrect implementation of the MAC learning and moves feature. Several configuration statements meant to enforce limits on MAC learning and moves can be configured but do not take effect. This can lead to control plane overload situations which will severely impact the ability of the device to processes legitimate traffic. A remote attacker on the local network can perform a denial of service (DoS) attack.

The vulnerability affects QFX5000 Series routers.

Remediation

Install update from vendor's website.

References

• https://supportportal.juniper.net/s/article/2024-10-Security-Bulletin-Junos-OS-Evolved-QFX5000-Series-Configured-MAC-learning-and-move-limits-are-not-in-effect-CVE-2024-47498