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CVE-2022-25304

Denial of Service (DoS)

7.5 HighFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

1.37%Up 0.5 points since Aug 23, 2022
90%50%10%1%

What each source reports

CVE List Score used 7.5

Denial of Service (DoS)

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.

Record
CVE-2022-25304
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P
Updated
2026-11-02
EUVDEUVD-2022-6584 7.5

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.

Record
EUVD-2022-6584
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P
Updated
2026-11-03
GitHub AdvisoriesGHSA-mfpj-3qhm-976m 7.5

Uncontrolled Resource Consumption in asyncua and opcua

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.

Record
GHSA-mfpj-3qhm-976m
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-400, CWE-770
Updated
2026-11-02
NVD 7.5

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.

Record
CVE-2022-25304
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-770
Updated
2026-11-02
OSV 7.5

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.

Record
CVE-2022-25304
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2022-25304 7.5

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.

Record
DEBIAN-CVE-2022-25304
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
Show 4 moreShow less
OSVGHSA-mfpj-3qhm-976m 7.5

Uncontrolled Resource Consumption in asyncua and opcua

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.

Record
GHSA-mfpj-3qhm-976m
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-400, CWE-770
Updated
2026-11-02
OSVPYSEC-2026-2385 7.5

Uncontrolled Resource Consumption in asyncua and opcua

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.

Record
PYSEC-2026-2385
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVPYSEC-2026-888 7.5

Uncontrolled Resource Consumption in asyncua and opcua

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.

Record
PYSEC-2026-888
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2022-25304 7.5

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.

Record
UBUNTU-CVE-2022-25304
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
asyncua
PyPI
 through 0.9.95
0.9.96
opcua
PyPI
 through 0.98.13 None known
python-opcua
Debian:11
 All versions, plus listed versions
0.98.11-10.98.11-2
 None known
asyncua
PyPI
 before 0.9.96, plus listed versions
0.5.00.5.10.6.00.6.10.8.0
Show 21 moreShow less
0.8.10.8.20.8.30.8.40.9.00.9.10.9.100.9.110.9.120.9.140.9.20.9.30.9.60.9.80.9.90.9.900.9.910.9.920.9.930.9.940.9.95
0.9.96
opcua
PyPI
 through 0.98.13, plus listed versions
0.90.40.95.00.95.10.95.20.95.3
Show 17 moreShow less
0.96.0.dev00.96.0.dev10.96.0.dev30.96.0.dev40.96.0.dev50.98.10.98.100.98.110.98.120.98.20.98.30.98.50.98.5rc00.98.60.98.70.98.80.98.9
 None known
python-opcua
Ubuntu:18.04:LTS
 All versions, plus listed versions
0.90.3-1
 None known
python-opcua
Ubuntu:20.04:LTS
 All versions, plus listed versions
0.98.6-30.98.6-3ubuntu10.98.9-1
 None known
python-opcua
Ubuntu:22.04:LTS
 All versions, plus listed versions
0.98.11-10.98.11-1ubuntu1
 None known

History

History
RecordedChangedSources
aliases, publishedEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2022-25304 is a high vulnerability (CVSS 7.5) in Asyncua Project Asyncua, published August 23, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.37%, the 72nd percentile. Fixed in asyncua 0.9.96.

References

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