Vulnerability · Published Aug 23, 2022 · Assigned by snyk
CVE-2022-25304Denial of Service (DoS)
High 7.5
In plain English
A high-severity security flaw in asyncua. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.4% (higher than 72% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)1.4%top 27.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | asyncua | 0.9.96 | GHSA-mfpj-3qhm-976m |
| PyPI | asyncua | 0.9.96 | PYSEC-2026-2385 |
| PyPI | opcua | no fix listed | GHSA-mfpj-3qhm-976m |
| PyPI | opcua | no fix listed | PYSEC-2026-888 |
| Ubuntu:22.04:LTS | python-opcua | no fix listed | UBUNTU-CVE-2022-25304 |
Affected products (as reported)
References
- https://security.snyk.io/vuln/SNYK-PYTHON-OPCUA-2988730 x_refsource_MISC
- https://security.snyk.io/vuln/SNYK-PYTHON-ASYNCUA-2988731 x_refsource_MISC
- https://github.com/FreeOpcUa/python-opcua/issues/1466 x_refsource_MISC