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Critical severity · published Mar 24, 2020
CVE-2020-1747
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…
9.8
CVSS
5.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)5.4% · higher than 93% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CC
Communications Cloud Native Core Network Function Cloud Native Environment · Oracle
22.1.0 · source: NVD
FE
Fedora · Fedoraproject
30; 31; 32; 33 · source: NVD
LE
Leap · Opensuse
15.1 · source: NVD
PY
Pyyaml · Pyyaml
5.1 before 5.3.1 · source: NVD
Affected product
FE
Fedora
Fedoraproject
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-1747
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-1747
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00017.html
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00017.html
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1747
Patch
https://github.com/yaml/pyyaml/pull/386
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7PPAS6C4SZRDQLR7C22A5U3QOLXY33JX/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K5HEPD7LEVDPCITY5IMDYWXUMX37VFMY/
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