Description (CNA)
An unauthenticated remote attacker can exhaust server memory via the FindServers Discovery Service in open62541. The serverUris field of FindServersRequest is not validated for length or array size. An attacker can declare an arbitrarily large string (up to ~3.9 GB) delivered across intermediate chunks without ever sending the final chunk. The server buffers all chunks in RAM indefinitely until the SecureChannel times out. The attack is pre-session and bypasses all encryption configuration. The issue affects open62541: from 1.4.0 through 1.4.16, from 1.5.0 through 1.5.4, master.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| open62541 project / o6 Automation GmbH / open62541 | affected 1.4.0 through 1.4.16; affected 1.5.0 through 1.5.4; affected master |
CWE
CWE-770, CWE-789
References
- https://github.com/open62541/open62541/pull/8142
- https://github.com/open62541/open62541/pull/8142/changes/d253818d6c5e870e1db0e360b18138c8bdc809ae
- https://github.com/open62541/open62541
ADP enrichment
No English description supplied.
No references supplied.