A vulnerability was discovered in the PyYAML library in versions before 5.3.1, where it is susceptible to arbitrary code execution when it processes untrusted YAML files through the full_load method or with the FullLoader loader. Applications that use the library to process untrusted input may be vulnerable to this flaw. An attacker could use this flaw to execute arbitrary code on the system by abusing the python/object/new constructor.
lists.opensuse.org/opensuse-security-announce/2020-04/msg00017.html
lists.opensuse.org/opensuse-security-announce/2020-05/msg00017.html
bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1747
github.com/yaml/pyyaml
github.com/yaml/pyyaml/commit/5080ba513377b6355a0502104846ee804656f1e0
github.com/yaml/pyyaml/pull/386
lists.fedoraproject.org/archives/list/[email protected]/message/7PPAS6C4SZRDQLR7C22A5U3QOLXY33JX
lists.fedoraproject.org/archives/list/[email protected]/message/K5HEPD7LEVDPCITY5IMDYWXUMX37VFMY
lists.fedoraproject.org/archives/list/[email protected]/message/MMQXSZXNJT6ERABJZAAICI3DQSQLCP3D
lists.fedoraproject.org/archives/list/[email protected]/message/WORRFHPQVAFKKXXWLSSW6XKUYLWM6CSH
lists.fedoraproject.org/archives/list/[email protected]/message/ZBJA3SGNJKCAYPSHOHWY3KBCWNM5NYK2
nvd.nist.gov/vuln/detail/CVE-2020-1747
www.oracle.com/security-alerts/cpujul2022.html