CVE-2020-1747 — Vulnetix

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CVE-2020-1747 REJECTED

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.

EPSS 3.07% · 86.6th percentile

Risk Scores

EPSS Score

3.07%

86.6th percentile

Affected Products

Vendor	Product	Versions
Ubuntu:20.04:LTS	pyyaml	0, 5.1.2-1, 5.1.2-1build1

Timeline

Oct 23, 2018 PoC Published
Mar 24, 2020 CVE Published
Mar 26, 2021 CVE Updated
Apr 14, 2021 EPSS Score
Jun 22, 2021 EPSS Score
Oct 24, 2021 EPSS Score
Dec 25, 2021 EPSS Score
Jan 6, 2022 EPSS Score
Feb 25, 2022 EPSS Score
Apr 1, 2022 EPSS Score
Apr 28, 2022 EPSS Score
Aug 31, 2022 EPSS Score

References

https://ubuntu.com/security/CVE-2020-1747 third-party-advisory
https://github.com/yaml/pyyaml/pull/386 third-party-advisory
https://www.cve.org/CVERecord?id=CVE-2020-1747 third-party-advisory

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