Directory Traversal Affecting salt package, versions [,2019.2.4) [3000, 3000.2)
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Test your applications- Snyk ID SNYK-PYTHON-SALT-568025
- published 30 Apr 2020
- disclosed 30 Apr 2020
- credit F-Secure Labs
Introduced: 30 Apr 2020
CVE-2020-11652 Open this link in a new tabHow to fix?
Upgrade salt to version 2019.2.4, 3000.2 or higher.
Overview
salt is a new approach to infrastructure management built on a dynamic communication bus. Salt can be used for data-driven orchestration, remote execution for any infrastructure, configuration management for any app stack, and much more.
Affected versions of this package are vulnerable to Directory Traversal. The wheel module contains commands used to read and write files under specific directory paths. The inputs to these functions are concatenated with the target directory and the resulting path is not canonicalized, leading to an escape of the intended path restriction.
The get_token() method of the salt.tokens.localfs class (which is exposed to unauthenticated requests by the ClearFuncs class) fails to sanitize the token input parameter which is then used as a filename, allowing insertion of ".." path elements and thus reading of files outside of the intended directory. The only restriction is that the file has to be deserializable by salt.payload.Serial.loads().