CVE-2019-20477 — Vulnetix

Try Vulnetix Request Demo

CVE-2019-20477 REJECTED

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.

EPSS 0.47% · 64.2th percentile

Risk Scores

EPSS Score

0.47%

64.2th percentile

Affected Products

Vendor	Product	Versions
Ubuntu:20.04:LTS	pyyaml	5.1.2-1, 5.1.2-1build1, 5.3-1ubuntu1

Timeline

Oct 23, 2018 PoC Published
Feb 19, 2020 CVE Published
Apr 14, 2021 EPSS Score
Jun 22, 2021 EPSS Score
Oct 24, 2021 EPSS Score
Dec 25, 2021 EPSS Score
Feb 4, 2022 EPSS Score
Feb 25, 2022 EPSS Score
Apr 1, 2022 EPSS Score
Jun 29, 2022 EPSS Score
Aug 31, 2022 EPSS Score
Jan 2, 2023 EPSS Score

References

https://ubuntu.com/security/CVE-2019-20477 third-party-advisory
https://github.com/yaml/pyyaml/blob/master/CHANGES third-party-advisory
https://www.exploit-db.com/download/47655 third-party-advisory
https://www.cve.org/CVERecord?id=CVE-2019-20477 third-party-advisory

Open in Interactive Console →