Denial of service in Junos OS and Junos OS Evolved fibtd

1) Improper check for unusual or exceptional conditions

EUVDB-ID: #VU88438

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-30409

CWE-ID: CWE-754 - Improper Check for Unusual or Exceptional Conditions

Exploit availability: No

Description

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 the forwarding information base telemetry daemon (fibtd) to crash, leading to a limited Denial of Service.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Junos OS Evolved: 22.1-EVO - 22.2-EVO

Juniper Junos OS: 22.1R1 - 22.4R1-S2

External links

http://supportportal.juniper.net/s/article/2024-04-Security-Bulletin-Junos-OS-and-Junos-OS-Evolved-Higher-CPU-consumption-on-routing-engine-leads-to-Denial-of-Service-DoS-CVE-2024-30409

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.