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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products
n/a:n/a
References 5
https://github.com/open62541/open62541/blob/master/doc/building.rst
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https://github.com/open62541/open62541/blob/master/src/server/ua_discovery_mdns…
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https://github.com/open62541/open62541/blob/master/src/server/ua_services_disco…
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https://github.com/open62541/open62541/issues/8094
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https://github.com/open62541/open62541/tree/master/examples/discovery
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