Denial of service in Junos OS PFE

Published: 2023-04-13

Risk	Medium
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2023-28984
CWE-ID	CWE-416
Exploitation vector	Local 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) Use-after-free

EUVDB-ID: #VU75097

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-2023-28984

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error in the Layer 2 Address Learning Manager (l2alm) of Juniper Networks Junos OS on QFX Series. A remote attacker on the local network can send specially crafted traffic to the device and crash the Packet Forwarding Engine.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 19.4 - 22.2R1-S2

External links

http://supportportal.juniper.net/s/article/2023-04-Security-Bulletin-Junos-OS-QFX-Series-The-PFE-may-crash-when-a-lot-of-MAC-addresses-are-being-learned-and-aged-CVE-2023-28984

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.