Vulnerability identifier: #VU68277

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-2022-22223

CWE-ID: CWE-20

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 denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of IPv4 and IPv6 packets. A remote attacker can send specially crafted IP packets to the affected device, causing multiple interfaces in the LAG to detach and perform a denial of service (DoS) attack.

Successful exploitation of the vulnerability requires that QFX10000 Series devices using Juniper Networks Junos OS are configured as transit IP/MPLS penultimate hop popping (PHP) nodes with link aggregation group (LAG) interfaces.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 21.3R1 - 21.3R3, 21.2R1 - 21.2R3-S2, 20.4 - 20.4R3-S3, 19.4 - 19.4R2-S5, 19.4R1 - 19.4R1-S4, 19.1 - 19.1R3-S7, 19.1R1-S4, 18.4 - 18.4R2-S9, 18.4R1-S5, 18.4R2-S3, 15.1 - 15.1R7-S10, 15.1F - 15.1F7-S2, 20.3 - 20.3R3-S1, 20.1 - 20.1R3-S2, 19.3 - 19.3R3-S4, 19.3R1-S1, 19.3R2 - 19.3R2-S7, 19.2 - 19.2R3-S3, 19.2R1-S4, 21.1 - 21.1R2-S2, 20.2 - 20.2R3-S2

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External links
http://supportportal.juniper.net/s/article/2022-10-Security-Bulletin-Junos-OS-QFX10000-Series-In-IP-MPLS-PHP-node-scenarios-upon-receipt-of-certain-crafted-packets-multiple-interfaces-in-LAG-configurations-may-detach-CVE-2022-22223

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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.