CVE-2026-67858

Sažetak

Buffer Overflow vulnerability exists in open62541 1.5.5 when the Local Discovery Server (LDS) is built with multicast discovery enabled through the MDNSD backend. An unauthenticated remote attacker can send a RegisterServer or RegisterServer2 request containing many unique discoveryUrls. This allows remote attackers to cause a denial of service.

Reference

https://github.com/open62541/open62541/blob/master/doc/building.rst
https://github.com/open62541/open62541/blob/master/src/server/ua_discovery_mdns.c
https://github.com/open62541/open62541/blob/master/src/server/ua_services_discovery.c
https://github.com/open62541/open62541/issues/8094
https://github.com/open62541/open62541/tree/master/examples/discovery
https://github.com/open62541/open62541/issues/8094

CVSS

Base:	7.5
Impact:	3.6
Exploitability:	3.9

Pristup

Vektor	Složenost	Autentikacija
NETWORK	LOW	NONE

Impact

Povjerljivost	Cjelovitost	Dostupnost
NONE	NONE	HIGH

CVSS vektor

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Zadnje važnije ažuriranje

05-08-2026 - 15:17

Objavljeno

04-08-2026 - 22:17