Exposure of resource to wrong sphere in Juniper Junos OS

1) Exposure of resource to wrong sphere

EUVDB-ID: #VU88450

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-21605

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

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to exposure of resource to wrong sphere error in the Packet Forwarding Engine (PFE). A remote non-authenticated attacker can cause a Denial of Service (DoS).

Specific valid link-local traffic is not blocked on ports in STP blocked state but is instead sent to the control plane of the device.

 This leads to excessive resource consumption and in turn severe impact on all control and management protocols of the device.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 21.2R1 - 23.4R1-S1

External links

http://supportportal.juniper.net/s/article/2024-04-Security-Bulletin-Junos-OS-SRX-300-Series-Specific-link-local-traffic-causes-a-control-plane-overload-CVE-2024-21605

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.