#VU82502 Incorrect comparison in Juniper Junos OS - CVE-2022-22203

Vulnerability identifier: #VU82502

Vulnerability risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-22203

CWE-ID: CWE-697

Exploitation vector: Local network

Exploit availability: No

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

Vendor: Juniper Networks, Inc.

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to incorrect comparison error in PFE. A remote non-authenticated attacker can cause a Denial of Service (DoS).

 On QFX5000 Series, and EX4600 and EX4650 platforms, the fxpc process will crash followed by the FPC reboot upon receipt of a specific hostbound packet.

Continued receipt of these specific packets will create a sustained Denial of Service (DoS) condition.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 19.4R1-S1, 19.4R1-S2, 19.4R1-S3, 19.4R1-S4, 19.4R2-S1, 19.4R2-S2, 19.4R2-S3, 19.4R2-S4, 19.4R2-S5, 19.4R2-S6, 19.4R2-S7, 19.4R2-S8, 19.4R3-S1, 19.4R3-S2, 19.4R3-S3, 19.4R3-S4, 19.4, 19.4R1, 19.4R2, 19.4R3

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External links
https://supportportal.juniper.net/s/article/2022-07-Security-Bulletin-Junos-OS-EX4600-Series-and-QFX5000-Series-Receipt-of-specific-traffic-will-lead-to-an-fxpc-process-crash-followed-by-an-FPC-reboot-CVE-2022-22203

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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