Denial of service in Junos OS PFE

1) Missing Synchronization

EUVDB-ID: #VU88489

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-2024-30387

CWE-ID: CWE-820 - Missing Synchronization

Exploit availability: No

Description

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

The vulnerability exists due to a missing synchronization error in the Packet Forwarding Engine (PFE). A remote authenticated attacker on the local network can cause a Denial-of-Service (DoS).

If an interface flaps while the system gathers statistics on that interface, two processes simultaneously access a shared resource which leads to a PFE crash and restart.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 20.4R1 - 23.2R1-S2

External links

http://supportportal.juniper.net/s/article/2024-04-Security-Bulletin-Junos-OS-ACX5448-ACX710-Due-to-the-interface-flaps-the-PFE-process-can-crash-CVE-2024-30387

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.