Vulnerability Monitor

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CVE-2017-18342

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.

Published

2018-06-27T12:29:00.210

Last Modified

2024-11-21T03:19:53.020

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 9.8 (CRITICAL)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

6.4

Weaknesses

Type: Primary
CWE-502

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	pyyaml	pyyaml	< 5.1	Yes
Operating System	fedoraproject	fedora	28	Yes
Operating System	fedoraproject	fedora	29	Yes
Operating System	fedoraproject	fedora	30	Yes

References

https://github.com/marshmallow-code/apispec/issues/278 Third Party Advisory ([email protected])
https://github.com/yaml/pyyaml/blob/master/CHANGES Release Notes, Third Party Advisory ([email protected])
https://github.com/yaml/pyyaml/issues/193 Third Party Advisory ([email protected])
https://github.com/yaml/pyyaml/pull/74 Patch, Third Party Advisory ([email protected])
https://github.com/yaml/pyyaml/wiki/PyYAML-yaml.load%28input%29-Deprecation ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JEX7IPV5P2QJITAMA5Z63GQCZA5I6NVZ/ ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KSQQMRUQSXBSUXLCRD3TSZYQ7SEZRKCE/ ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M6JCFGEIEOFMWWIXGHSELMKQDD4CV2BA/ ([email protected])
https://security.gentoo.org/glsa/202003-45 Third Party Advisory ([email protected])
https://github.com/marshmallow-code/apispec/issues/278 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/yaml/pyyaml/blob/master/CHANGES Release Notes, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/yaml/pyyaml/issues/193 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/yaml/pyyaml/pull/74 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/yaml/pyyaml/wiki/PyYAML-yaml.load%28input%29-Deprecation (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JEX7IPV5P2QJITAMA5Z63GQCZA5I6NVZ/ (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KSQQMRUQSXBSUXLCRD3TSZYQ7SEZRKCE/ (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M6JCFGEIEOFMWWIXGHSELMKQDD4CV2BA/ (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/202003-45 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)