Vulnerability identifier: #VU85334

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-2024-21601

CWE-ID: CWE-362

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 attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a race condition in the Flow-processing Daemon (flowd). A remote attacker can send specially crafted TCP packets to the device and perform a denial of service attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 22.4R1 - 22.4R2, 22.3R1 - 22.3R2-S1, 21.4R1 - 21.4R3-S3, 21.3R1 - 21.3R3-S4, 22.2R1 - 22.2R2-S2, 22.1R1 - 22.1R3-S2, 21.2R1 - 21.2R3-S4

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External links
http://supportportal.juniper.net/s/article/2024-01-Security-Bulletin-Junos-OS-SRX-Series-Due-to-an-error-in-processing-TCP-events-flowd-will-crash-CVE-2024-21601

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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.