SB2024041088 - Improper check for unusual or exceptional conditions in Junos OS Evolved and Juniper Junos OS

Description

This security bulletin contains information about 1 security vulnerability.

1) Improper check for unusual or exceptional conditions (CVE-ID: CVE-2024-30402)

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

The vulnerability exists due to an improper check for unusual or exceptional conditions error in the Layer 2 Address Learning Daemon (l2ald). A remote non-authenticated attacker can cause a Denial of Service (DoS).

When telemetry requests are sent to the device, and the Dynamic Rendering Daemon (drend) is suspended, the l2ald crashes and restarts due to factors outside the attackers control.

Repeated occurrences of these events causes a sustained DoS condition.

Remediation

Install update from vendor's website.

References

• https://supportportal.juniper.net/s/article/2024-04-Security-Bulletin-Junos-OS-and-Junos-OS-Evolved-The-l2ald-crashes-on-receiving-telemetry-messages-from-a-specific-subscription-CVE-2024-30402