GHSA-8q59-q68h-6hv4
Improper Input Validation in PyYAML
At a glance
- Published
- Updated
- CVE
- CVE-2020-14343
- Aliases
- PYSEC-2021-142
- CVSS_V3
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS_V4
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Description
A vulnerability was discovered in the PyYAML library in versions before 5.4, 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. This flaw allows an attacker to execute arbitrary code on the system by abusing the python/object/new constructor. This flaw is due to an incomplete fix for CVE-2020-1747.
Affected packages
| Package | Versions |
|---|---|
| PyPI · pyyaml | introduced 0, fixed 5.4 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2020-14343 ADVISORY
- https://github.com/SeldonIO/seldon-core/issues/2252 WEB
- https://github.com/yaml/pyyaml/issues/420 WEB
- https://github.com/yaml/pyyaml/issues/420#issuecomment-663673966 WEB
- https://github.com/yaml/pyyaml/commit/a001f2782501ad2d24986959f0239a354675f9dc WEB
- https://bugzilla.redhat.com/show_bug.cgi?id=1860466 WEB
- https://github.com/advisories/GHSA-8q59-q68h-6hv4 ADVISORY
- https://github.com/pypa/advisory-database/tree/main/vulns/pyyaml/PYSEC-2021-142.yaml WEB
- https://github.com/yaml/pyyaml PACKAGE
- https://pypi.org/project/PyYAML WEB
- https://www.oracle.com/security-alerts/cpuapr2022.html WEB
- https://www.oracle.com/security-alerts/cpujul2022.html WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |