Vulnerability identifier: #VU65402

Vulnerability risk: Medium

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

CVE-ID: CVE-2022-22202

CWE-ID: CWE-755

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 attacker to perform a DoS attack.

The vulnerability exists due to improper error handling when processing MPLS packets. A remote attacker on the local network can send specially crafted MPLS packets to the affected device and perform a denial of service attack by crashing the dcpfe process.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 22.1R1 - 22.1R1-S2, 21.2R1 - 21.2R3, 20.4 - 20.4R3-S3, 20.2 - 20.2R3-S4, 19.2 - 19.2R3-S5, 19.2R1-S4, 20.1 - 20.1R3-S3, 19.1 - 19.1R3-S8, 19.1R1-S4, 21.3R1 - 21.3R2-S2, 21.4R1 - 21.4R1-S2, 19.4 - 19.4R3-S7, 19.4R1 - 19.4R1-S4, 21.1 - 21.1R3-S1, 20.3 - 20.3R3-S3, 19.3 - 19.3R3-S5, 19.3R1-S1, 19.3R2 - 19.3R2-S7

---

External links
http://supportportal.juniper.net/s/article/2022-07-Security-Bulletin-Junos-OS-PTX-Series-FPCs-may-restart-unexpectedly-upon-receipt-of-specific-MPLS-packets-with-certain-multi-unit-interface-configurations-CVE-2022-22202

---

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.