CVE-2022-25304
All versions of package opcua; all versions of package asyncua are vulnerable to Denial of Service (DoS) due to a missing limitation on the number of received chunks - per single session or in total for all concurrent sessions.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.34%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
All versions of package opcua; all versions of package asyncua are vulnerable to Denial of Service (DoS) due to a missing limitation on the number of received chunks - per single session or in total for all concurrent sessions. An attacker can exploit this vulnerability by sending an unlimited number of huge chunks (e.g. 2GB each) without sending the Final closing chunk.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.34% probability · 70th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-770
- Affected
- asyncua project/asyncua · opcua project/opcua
- Source
- report@snyk.io
References
- https://github.com/FreeOpcUa/python-opcua/issues/1466Issue Tracking, Third Party Advisory
- https://security.snyk.io/vuln/SNYK-PYTHON-ASYNCUA-2988731Third Party Advisory
- https://security.snyk.io/vuln/SNYK-PYTHON-OPCUA-2988730Third Party Advisory
- https://github.com/FreeOpcUa/python-opcua/issues/1466Issue Tracking, Third Party Advisory
- https://security.snyk.io/vuln/SNYK-PYTHON-ASYNCUA-2988731Third Party Advisory
- https://security.snyk.io/vuln/SNYK-PYTHON-OPCUA-2988730Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.