Local denial of service in Junos OS and Junos OS Evolved

1) Improper handling of unexpected data type

EUVDB-ID: #VU82453

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-22193

CWE-ID: CWE-241 - Improper Handling of Unexpected Data Type

Exploit availability: No

Description

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

The vulnerability exists due to improper handling of unexpected data type error in the Routing Protocol Daemon (rpd). A local authenticated user can cause a Denial of Service (DoS).

Continued execution of this command might cause a sustained Denial of Service condition.

 If BGP rib sharding is configured and a certain CLI command is executed the rpd process can crash.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Junos OS Evolved: 20.4 - 21.3-EVO

Juniper Junos OS: 20.3 - 21.2R1-S2

CPE2.3

• cpe:2.3:o:juniper_networks:junos_os_evolved:21.1R2-EVO:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:junos_os_evolved:21.2R1-S2-EVO:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:junos_os_evolved:20.4R2-S3-EVO:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:junos_os_evolved:20.4R2-S2-EVO:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:junos_os_evolved:21.3-EVO:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:juniper_junos_os:21.1R2-S2:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:juniper_junos_os:20.3R3:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:juniper_junos_os:21.2R1-S2:*:*:*:*:*:*:*
• cpe:2.3:o:juniper_networks:juniper_junos_os:20.4R2-S2:*:*:*:*:*:*:*

External links

http://supportportal.juniper.net/s/article/2022-04-Security-Bulletin-Junos-OS-and-Junos-OS-Evolved-In-a-BGP-rib-sharding-scenario-when-a-certain-CLI-command-is-executed-the-rpd-process-might-crash-CVE-2022-22193

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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