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gentooGentoo FoundationGLSA-202402-33
HistoryFeb 26, 2024 - 12:00 a.m.

PyYAML: Arbitrary Code Execution

2024-02-2600:00:00
Gentoo Foundation
security.gentoo.org
16
pyyaml
vulnerability
arbitrary code
execution
cve
impact
full_load
fullloader
untrusted files
workaround
resolution
upgrade
python/object/new
cve-2020-1747
incomplete fix

8.3 High

AI Score

Confidence

Low

0.006 Low

EPSS

Percentile

77.8%

JSON

Background

PyYAML is a YAML parser and emitter for Python.

Description

A vulnerability has been discovered in PyYAML. Please review the CVE identifier referenced below for details.

Impact

A vulnerability was discovered in the PyYAML library, 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.

Workaround

There is no known workaround at this time.

Resolution

All PyYAML users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=dev-python/pyyaml-5.4"
OSVersionArchitecturePackageVersionFilename
Gentooanyalldev-python/pyyaml< 5.4UNKNOWN

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8.3 High

AI Score

Confidence

Low

0.006 Low

EPSS

Percentile

77.8%

JSON
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