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CVE-2017-18342

Good to know:

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Date: June 27, 2018

In PyYAML before 5.1, the yaml.load() API could execute arbitrary code if used with untrusted data. The load() function has been deprecated in version 5.1 and the 'UnsafeLoader' has been introduced for backward compatibility with the function.

Language: Python

Severity Score

Related Resources (20)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M6JCFGEIEOFMWWIXGHSELMKQDD4CV2BA/
https://github.com/yaml/pyyaml/wiki/PyYAML-yaml.load%28input%29-Deprecation
https://access.redhat.com/security/cve/CVE-2017-18342
https://github.com/pypa/advisory-database/tree/main/vulns/pyyaml/PYSEC-2018-49.yaml
https://github.com/marshmallow-code/apispec/issues/278
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KSQQMRUQSXBSUXLCRD3TSZYQ7SEZRKCE
https://github.com/yaml/pyyaml/commit/7b68405c81db889f83c32846462b238ccae5be80
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/M6JCFGEIEOFMWWIXGHSELMKQDD4CV2BA
https://github.com/yaml/pyyaml/wiki/PyYAML-yaml.load(input)-Deprecation
https://github.com/yaml/pyyaml/issues/193
https://github.com/yaml/pyyaml
https://security.gentoo.org/glsa/202003-45
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JEX7IPV5P2QJITAMA5Z63GQCZA5I6NVZ/
https://github.com/yaml/pyyaml/blob/master/CHANGES
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KSQQMRUQSXBSUXLCRD3TSZYQ7SEZRKCE/
https://security-tracker.debian.org/tracker/CVE-2017-18342
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JEX7IPV5P2QJITAMA5Z63GQCZA5I6NVZ
https://nvd.nist.gov/vuln/detail/CVE-2017-18342
https://github.com/yaml/pyyaml/pull/74
https://www.mend.io/vulnerability-database/CVE-2017-18342

Severity Score

Weakness Type (CWE)

Deserialization of Untrusted Data

CWE-502

Improper Input Validation

CWE-20

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): PARTIAL
Availability (A): PARTIAL
Additional information:

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