Improper handling of unexpected data type in Junos OS

Published: 2023-04-17

Risk	Medium
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2023-28961
CWE-ID	CWE-241
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Juniper Junos OS Operating systems & Components / Operating system
Vendor	Juniper Networks, Inc.

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Improper handling of unexpected data type

EUVDB-ID: #VU75151

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-2023-28961

CWE-ID: CWE-241 - Improper Handling of Unexpected Data Type

Exploit availability: No

Description

The vulnerability allows a remote attacker to send unwanted traffic to the device.

The vulnerability exists due to improper handling of unexpected data type in IPv6 firewall filter processing, which prevents a firewall filter with the term 'from next-header ah' from being properly installed in the packet forwarding engine (PFE).

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 20.2 - 22.1R1-S2

External links

http://supportportal.juniper.net/s/article/2023-04-Security-Bulletin-Junos-OS-ACX-Series-IPv6-firewall-filter-is-not-installed-in-PFE-when-from-next-header-ah-is-used-CVE-2023-28961

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.