Vulnerability identifier: #VU68578

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-2022-22226

CWE-ID: CWE-401

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 DoS attack on the target system.

The vulnerability exists due memory leak within the Packet Forwarding Engine (PFE) when VxLAN is enabled. A remote attacker on the local network can send specific packets to the affected device and perform denial of service attack.

Mitigation
Install updates from vendor's website. The vulnerability affects Juniper Networks Junos OS on EX4300-MP, EX4600, and QFX5000 Series.

Vulnerable software versions

Juniper Junos OS: 19.2 - 19.2R1-S6, 19.2R1-S4, 19.4, 19.4R1 - 19.4R1-S3, 19.3 - 19.3R1, 19.3R1-S1, 19.3R2 - 19.3R2-S5, 17.3 - 17.3R3-S11, 18.3 - 18.3R3-S4, 18.3R2-S3, 18.3R3-S1, 17.4 - 17.4R2-S12, 17.4R2-S9, 20.2 - 20.2R2-S2, 18.1 - 18.1R3-S12, 18.2 - 18.2R3-S7, 19.1 - 19.1R3-S3, 19.1R1-S4, 20.4, 20.3 - 20.3R1-S2, 18.4 - 18.4R1-S7, 18.4R1-S5, 20.1 - 20.1R1-S4

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External links
http://supportportal.juniper.net/s/article/2022-10-Security-Bulletin-Junos-OS-EX4300-MP-EX4600-QFX5000-Series-In-VxLAN-scenarios-specific-packets-processed-cause-a-memory-leak-leading-to-a-PFE-crash-CVE-2022-22226

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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.