Vulnerability identifier: #VU82463

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-22185

CWE-ID: CWE-754

Exploitation vector: 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.

A vulnerability in Juniper Networks Junos OS on SRX Series, allows a network-based unauthenticated attacker to cause a Denial of Service (DoS) by sending a specific fragmented packet to the device, resulting in a flowd process crash, which is responsible for packet forwarding. Continued receipt and processing of this specific packet will create a sustained DoS condition.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 19.2 - 19.2R3-S3, 19.2R1-S4, 18.4 - 18.4R3-S9, 18.4R1-S5, 18.4R2-S3, 21.1 - 21.1R2, 19.1 - 19.1R3-S6, 19.1R1-S4, 20.2 - 20.2R3-S2, 19.4 - 19.4R3-S5, 19.4R1 - 19.4R1-S4, 19.3 - 19.3R3-S3, 19.3R1-S1, 19.3R2 - 19.3R2-S7, 20.1 - 20.1R3-S1, 18.3 - 18.3R3-S5, 18.3R2-S3, 18.3R3-S1, 20.3 - 20.3R3, 21.2R1 - 21.2R1-S2, 20.4 - 20.4R2-S2

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External links
http://supportportal.juniper.net/s/article/2022-04-Security-Bulletin-Junos-OS-SRX-Series-Denial-of-service-vulnerability-in-flowd-daemon-upon-receipt-of-a-specific-fragmented-packet-CVE-2022-22185

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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 Internet.

Is there known malware, which exploits this vulnerability?

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