Exposure of resource to wrong sphere in Juniper Junos OS

1) Exposure of resource to wrong sphere

EUVDB-ID: #VU85279

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-2024-21597

CWE-ID: CWE-668 - Exposure of resource to wrong sphere

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to manipulate data.

The vulnerability exists due to exposure of resource to wrong sphere error in the Packet Forwarding Engine (PFE). A remote non-authenticated attacker can bypass the intended access restrictions.

In an Abstracted Fabric (AF) scenario if routing-instances (RI) are configured, specific valid traffic destined to the device can bypass the configured lo0 firewall filters as it's received in the wrong RI context.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 20.4R1 - 22.4R1-S2

External links

http://supportportal.juniper.net/s/article/2024-01-Security-Bulletin-Junos-OS-MX-Series-In-an-AF-scenario-traffic-can-bypass-configured-lo0-firewall-filters-CVE-2024-21597

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.