Vulnerability identifier: #VU82232

Vulnerability risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-44202

CWE-ID: CWE-863

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Junos OS Evolved
Operating systems & Components / Operating system

Vendor: Juniper Networks, Inc.

Description

The vulnerability allows a remote non-authenticated attacker to bypass implemented security restrictions.

The vulnerability exists due to incorrect authorization error in TCP packet processing. A remote non-authenticated attacker can manipulate data and bypass a control plane firewall filter.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Junos OS Evolved: 21.4R1-EVO - 21.4R2-EVO, 22.1-EVO - 22.1R2-S1-EVO, 21.3-EVO - 21.3R3-S1-EVO, 22.2-EVO, 20.4 - 20.4R3-S3-EVO, 20.4R2-S2-EVO

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External links
http://supportportal.juniper.net/s/article/2023-10-Security-Bulletin-Junos-OS-Evolved-Specific-TCP-packets-will-bypass-a-control-plane-firewall-filter-CVE-2023-44202

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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.