An exploitable vulnerability exists in the configuration-loading functionality of the jw.util package before 2.3 for Python. When loading a configuration with FromString or FromStream with YAML, one can execute arbitrary Python code, resulting in OS command execution, because safe_load is not used.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-13388
Reference (s):
- https://security.netapp.com/advisory/ntap-20200528-0002/
- https://joel-malwarebenchmark.github.io
- https://joel-malwarebenchmark.github.io/blog/2020/04/27/cve-2020-13388-jw-util-vulnerability/