A flaw was found in dhcp-server. A remote attacker with network access to the OMAPI (Open Management Application Programming Interface) port, especially if not secured with TSIG (Transaction Signature) key authentication, could send a specially crafted lease creation request. This request, containing an overly long InfiniBand MAC address, triggers a buffer overflow in the print_hw_addr() function. Successful exploitation leads to a persistent denial of service (DoS), causing the dhcpd service to crash and preventing it from restarting without manual intervention.
Exploitability
AV:NAC:LPR:HUI:NScope
S:UImpact
C:NI:NA:H4.9/CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:HMemory Safety