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Uncontrolled Resource Consumption in asyncua and opcua

High severity GitHub Reviewed Published Aug 24, 2022 to the GitHub Advisory Database • Updated Apr 7, 2023

Package

pip asyncua (pip)

Affected versions

<= 0.9.95

Patched versions

0.9.96
pip opcua (pip)
<= 0.98.13
None

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.

References

Published by the National Vulnerability Database Aug 23, 2022
Published to the GitHub Advisory Database Aug 24, 2022
Reviewed Aug 30, 2022
Last updated Apr 7, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS score

0.121%
(47th percentile)

Weaknesses

CVE ID

CVE-2022-25304

GHSA ID

GHSA-mfpj-3qhm-976m

Source code

Credits

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