High severity7.5NVD Advisory· Published Aug 23, 2022· Updated Jun 17, 2026
CVE-2022-25304
CVE-2022-25304
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.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
asyncuaPyPI | < 0.9.96 | 0.9.96 |
opcuaPyPI | <= 0.98.13 | — |
Affected products
4- cpe:2.3:a:asyncua_project:asyncua:*:*:*:*:*:python:*:*
- cpe:2.3:a:opcua_project:opcua:*:*:*:*:*:python:*:*
- ghsa-coords2 versions
< 0.9.96+ 1 more
- (no CPE)range: < 0.9.96
- (no CPE)range: <= 0.98.13
Patches
Vulnerability mechanics
References
6- github.com/FreeOpcUa/python-opcua/issues/1466nvdIssue TrackingThird Party AdvisoryWEB
- github.com/advisories/GHSA-mfpj-3qhm-976mghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2022-25304ghsaADVISORY
- security.snyk.io/vuln/SNYK-PYTHON-ASYNCUA-2988731nvdThird Party AdvisoryWEB
- security.snyk.io/vuln/SNYK-PYTHON-OPCUA-2988730nvdThird Party AdvisoryWEB
- github.com/FreeOpcUa/opcua-asyncio/commit/01c7acf047887b62d979cd4373d370e72a4b9057ghsaWEB
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