GMS-2020-756: Remote Memory Exposure in openwhisk

September 1, 2020 (updated September 24, 2021)

Versions of openwhisk before 3.3.1 are vulnerable to remote memory exposure.

When a number is passed to api_key, affected versions of openwhisk allocate an uninitialized buffer and send that over network in Authorization header (base64-encoded).

Proof of concept:

var openwhisk = require('openwhisk');
var options = {
  apihost: '127.0.0.1:1433', 
  api_key: USERSUPPLIEDINPUT // number
};
var ow = openwhisk(options);
ow.actions.invoke({actionName: 'sample'}).then(result => console.log(result))

Recommendation

Update to version 3.3.1 or later.

References

Code Behaviors & Features

Detect and mitigate GMS-2020-756 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →