Vulnerability identifier: #VU82491

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-2023-22396

CWE-ID: CWE-400

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.

An Uncontrolled Resource Consumption vulnerability in TCP processing on the Routing Engine (RE) of Juniper Networks Junos OS allows an unauthenticated network-based attacker to send crafted TCP packets destined to the device, resulting in an MBUF leak that ultimately leads to a Denial of Service (DoS).

The system does not recover automatically and must be manually restarted to restore service.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 22.1R1 - 22.1R2, 22.2R1 - 22.2R1-S1, 22.3R1, 20.3 - 20.3R3-S5, 21.1 - 21.1R3-S3, 20.2 - 20.2R3-S5, 19.4 - 19.4R3-S9, 19.4R1 - 19.4R1-S4, 20.4 - 20.4R3-S4, 21.2R1 - 21.2R3-S2, 19.3 - 19.3R3-S6, 19.3R1-S1, 19.3R2 - 19.3R2-S7, 21.3R1 - 21.3R3-S1, 21.4R1 - 21.4R2-S2

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External links
http://supportportal.juniper.net/s/article/2023-01-Security-Bulletin-Junos-OS-Receipt-of-crafted-TCP-packets-on-Ethernet-console-port-results-in-MBUF-leak-leading-to-Denial-of-Service-DoS-CVE-2023-22396

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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.