Vulnerability identifier: #VU82472

Vulnerability 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-2023-22409

CWE-ID: CWE-606

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Juniper Junos OS
Operating systems & Components / Operating system

Vendor: Juniper Networks, Inc.

Description

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

The vulnerability exists due to unchecked input for loop condition error in a NAT library. A local authenticated user can cause a Denial of Service (DoS).

 When an inconsistent "deterministic NAT" configuration is present on an SRX, or MX with SPC3 and then a specific CLI command is issued the SPC will crash and restart.

Repeated execution of this command will lead to a sustained DoS.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 21.4R1 - 21.4R3, 21.3R1 - 21.3R3-S2, 20.3 - 20.3R3-S5, 21.1 - 21.1R3-S3, 20.2 - 20.2R3-S5, 19.4 - 19.4R3-S9, 19.4R1 - 19.4R1-S4, 20.4 - 20.4R3-S4, 22.2R1 - 22.2R1-S2, 22.1R1 - 22.1R2-S1, 21.2R1 - 21.2R3-S2

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External links
http://supportportal.juniper.net/s/article/2023-01-Security-Bulletin-Junos-OS-SRX-Series-MX-Series-with-SPC3-When-an-inconsistent-NAT-configuration-exists-and-a-specific-CLI-command-is-issued-the-SPC-will-reboot-CVE-2023-22409

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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.