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 products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | opcua | < unspecified | unspecified |
| — | asyncua | < unspecified | unspecified |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 11 | python-opcua | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | python-opcua | No fix yet | — |
| Ubuntu 20.04 LTS | python-opcua | No fix yet | — |
| Ubuntu 18.04 LTS | python-opcua | No fix yet | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | asyncua | < 0.9.96 | 0.9.96 | GHSA-mfpj-3qhm-976m |
| PyPI | opcua | <= 0.98.13 | — | GHSA-mfpj-3qhm-976m |