National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2020-1747 Detail

Current 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.

Source:  MITRE
View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score: 9.8 CRITICAL
Vector:  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Nist CVSS score does not match with CNA score
CNA:  Red Hat, Inc.
Base Score: 9.8 CRITICAL
Vector:  CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00017.html
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00017.html
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1747 Issue Tracking Third Party Advisory
https://github.com/yaml/pyyaml/pull/386 Patch Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/K5HEPD7LEVDPCITY5IMDYWXUMX37VFMY/ Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WORRFHPQVAFKKXXWLSSW6XKUYLWM6CSH/ Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZBJA3SGNJKCAYPSHOHWY3KBCWNM5NYK2/ Third Party Advisory

Weakness Enumeration

CWE-ID CWE Name Source
CWE-20 Improper Input Validation NIST   Red Hat, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:pyyaml:pyyaml:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
5.3.1

Configuration 2 ( hide )
 cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

7 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2020-1747
NVD Published Date:
03/24/2020
NVD Last Modified:
05/11/2020