CVE-2022-25304: Asyncua Remote Code Execution Vulnerability

HIGH
Advisory Identifier: GHSA-mfpj-3qhm-976m
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CVSS 7.5
CWE-400 CWE-770
Published
Advisory Summary

CVE-2022-25304 is a HIGH (CVSS 7.5) remote code execution vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Asyncua libraries in the PyPI ecosystem. The issue involves uncontrolled resource consumption in asyncua and opcua. Remediation is available by upgrading affected packages to version 0.9.96.

CVE-2022-25304 at a Glance

CVE Identifier CVE-2022-25304
GHSA Identifier GHSA-mfpj-3qhm-976m
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product Asyncua
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2022-25304

To remediate this vulnerability, upgrade all affected Asyncua dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

asyncua fixed: 0.9.96 
pip install asyncua>=0.9.96
opcua fixed: Latest secure release 
pip install opcua>=Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show asyncua

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2022-25304, inspect your installed packages using pip:

pip show asyncua

Analyze the terminal output to locate any version of Asyncua in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.9.96), your application is affected.

Note: The pip show asyncua command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In Asyncua, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2022-25304 Affected Asyncua Versions

2 component(s)
Fixed Versions:
0.9.96
Product / Package Ecosystem Affected Versions Fixed Version
asyncua
pypi/asyncua
PyPI
< 0.9.96
0.9.96
opcua
pypi/opcua
PyPI
≤ 0.98.13

References

NVD — CVE-2022-25304 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-25304
Asyncua Source Repository REPOSITORY
https://github.com/FreeOpcUa/python-opcua/issues/1466
Security Fix Commit FIX COMMIT
https://github.com/FreeOpcUa/opcua-asyncio/commit/01c7acf047887b62d979cd4373d370e72a4b9057
Asyncua Source Repository REPOSITORY
https://github.com/FreeOpcUa/opcua-asyncio
Asyncua Security Information SECURITY
https://security.snyk.io/vuln/SNYK-PYTHON-ASYNCUA-2988731
Asyncua Security Information SECURITY
https://security.snyk.io/vuln/SNYK-PYTHON-OPCUA-2988730

Frequently Asked Questions

What is CVE-2022-25304?
CVE-2022-25304 is a security vulnerability in Asyncua involving Uncontrolled Resource Consumption in asyncua and opcua under CWE-400: Uncontrolled Resource Consumption.
Which Asyncua versions are affected?
Affected versions include releases prior to 0.9.96 across affected packages: asyncua, opcua.
What version fixes CVE-2022-25304?
Upgrading to 0.9.96 (or the latest patched release for your respective branch) resolves the vulnerability.
Is asyncua affected?
Yes, asyncua is affected in releases prior to 0.9.96. Upgrade your dependency to 0.9.96 or later.
Is opcua affected?
Yes, opcua is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2022-25304?
CVE-2022-25304 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2022-25304?
CVE-2022-25304 is classified under CWE-400: Uncontrolled Resource Consumption (The product does not properly control the allocation and maintenance of a limited resource.).
How can I check PyPI dependencies for CVE-2022-25304?
Run the dependency tree command: 'pip show asyncua'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-mfpj-3qhm-976m",
  "modified" : "2022-09-30T02:21:34Z",
  "published" : "2022-08-24T00:00:31Z",
  "aliases" : [ "CVE-2022-25304" ],
  "summary" : "Uncontrolled Resource Consumption in asyncua and opcua",
  "details" : "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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "asyncua"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.9.96"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 0.9.95"
    }
  }, {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "opcua"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.98.13"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-25304"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FreeOpcUa/python-opcua/issues/1466"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FreeOpcUa/opcua-asyncio/commit/01c7acf047887b62d979cd4373d370e72a4b9057"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/FreeOpcUa/opcua-asyncio"
  }, {
    "type" : "WEB",
    "url" : "https://security.snyk.io/vuln/SNYK-PYTHON-ASYNCUA-2988731"
  }, {
    "type" : "WEB",
    "url" : "https://security.snyk.io/vuln/SNYK-PYTHON-OPCUA-2988730"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400", "CWE-770" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-08-30T20:50:07Z",
    "nvd_published_at" : "2022-08-23T05:15:00Z"
  }
}