Resource exhaustion in FortiSwitch - CVE-2021-26111

Vulnerability identifier: #VU53719

CSH Severity: Medium

CVSSv4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

CVE-ID: CVE-2021-26111

CWE-ID: CWE-400

Exploitation vector: Adjecent network

Exploit availability: No public exploit available

Vulnerable software:
FortiSwitch

Software vendor:
Fortinet, Inc

The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak in lldpmedd daemon. A remote attacker on the local network can send specifically crafted LLDP/CDP/EDP packets to the device and exhaust all memory resources.

Install updates from vendor's website.

• https://www.fortiguard.com/psirt/FG-IR-21-026