Denial of service in Junos OS on MX Series

1) Improper Check for Unusual or Exceptional Conditions

EUVDB-ID: #VU85332

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-21603

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

Exploit availability: No

Description

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

The vulnerability exists due to improper error handling in the kernel when gathering statistics in a scaled SCU/DCU configuration. A remote user can perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 20.4R1 - 22.3R2-S2

External links

http://supportportal.juniper.net/s/article/2024-01-Security-Bulletin-Junos-OS-MX-Series-Gathering-statistics-in-a-scaled-SCU-DCU-configuration-will-lead-to-a-device-crash-CVE-2024-21603

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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