Local denial of service in Junos OS and Junos OS Evolved rpd

Published: 2023-07-16

Risk	Low
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2023-36840
CWE-ID	CWE-617
Exploitation vector	Local
Public exploit	N/A
Vulnerable software Subscribe	Junos OS Evolved Operating systems & Components / Operating system Juniper Junos OS Operating systems & Components / Operating system
Vendor	Juniper Networks, Inc.

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Reachable Assertion

EUVDB-ID: #VU78281

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-2023-36840

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: No

Description

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

The vulnerability exists due to a reachable assertion in Routing Protocol Daemon (RPD). A local user can execute a specific L2VPN command and crash the RPD daemon.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Junos OS Evolved: 20.4 - 22.3R1-S2-EVO

Juniper Junos OS: 19.3 - 22.3R1-S2

External links

http://supportportal.juniper.net/s/article/2023-07-Security-Bulletin-Junos-OS-and-Junos-OS-Evolved-An-rpd-crash-occurs-when-a-specific-L2VPN-command-is-run-CVE-2023-36840

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.