CVE-2019-20477

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 72%
VendorProductVersion
pyyamlpyyaml
5.1 ≤
𝑥
≤ 5.1.2
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
pyyaml
bullseye
5.3.1-5
fixed
buster
not-affected
stretch
not-affected
jessie
not-affected
bookworm
6.0-3
fixed
sid
6.0.2-1
fixed
trixie
6.0.2-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
pyyaml
focal
not-affected
eoan
ignored
bionic
not-affected
xenial
not-affected
trusty
not-affected
Common Weakness Enumeration
References
https://github.com/yaml/pyyaml/blob/master/CHANGES
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/33VBUY73AA6CTTYL3LRWHNFDULV7PFPN/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/52N5XS73Z5S4ZN7I7R56ICCPCTKCUV4H/
https://www.exploit-db.com/download/47655
https://github.com/yaml/pyyaml/blob/master/CHANGES
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/33VBUY73AA6CTTYL3LRWHNFDULV7PFPN/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/52N5XS73Z5S4ZN7I7R56ICCPCTKCUV4H/
https://www.exploit-db.com/download/47655