—

PYSEC-2020-176

Quick fix

PYSEC-2020-176 — pyyaml: upgrade to the fixed version with the command below.

pip install --upgrade 'pyyaml>=5.2b1'

Details

PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists because of an incomplete fix for CVE-2017-18342.

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI/pyyaml

Introduced in: 5.1Fixed in: 5.2b1

Fixpip install --upgrade 'pyyaml>=5.2b1'

References

https://www.exploit-db.com/download/47655[WEB]
https://github.com/yaml/pyyaml/blob/master/CHANGES[WEB]
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/52N5XS73Z5S4ZN7I7R56ICCPCTKCUV4H/[WEB]
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/33VBUY73AA6CTTYL3LRWHNFDULV7PFPN/[WEB]
https://github.com/advisories/GHSA-3pqx-4fqf-j49f[ADVISORY]