Null pointer dereference in Junos OS Evolved

1) Null pointer dereference

EUVDB-ID: #VU85281

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-2024-21602

CWE-ID: CWE-476 - NULL Pointer Dereference

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 null pointer dereference error. A remote non-authenticated attacker can cause a Denial of Service (DoS).

If a specific IPv4 UDP packet is received and sent to the Routing Engine (RE) packetio crashes and restarts which causes a momentary traffic interruption.

 Continued receipt of such packets will lead to a sustained DoS.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Junos OS Evolved: 21.4R1-EVO - 22.3R1-S2-EVO

External links

http://supportportal.juniper.net/s/article/2024-01-Security-Bulletin-Junos-OS-Evolved-ACX7024-ACX7100-32C-and-ACX7100-48L-Traffic-stops-when-a-specific-IPv4-UDP-packet-is-received-by-the-RE-CVE-2024-21602

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.