CVE-2016-4972

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Summary

CVECVE-2016-4972
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2016-09-26 16:59:01 UTC
Updated2026-05-06 22:30:45 UTC
DescriptionOpenStack Murano before 1.0.3 (liberty) and 2.x before 2.0.1 (mitaka), Murano-dashboard before 1.0.3 (liberty) and 2.x before 2.0.1 (mitaka), and python-muranoclient before 0.7.3 (liberty) and 0.8.x before 0.8.5 (mitaka) improperly use loaders inherited from yaml.Loader when parsing MuranoPL and UI files, which allows remote attackers to create arbitrary Python objects and execute arbitrary code via crafted extended YAML tags in UI definitions in packages.

Risk And Classification

Primary CVSS: v3.0 9.8 CRITICAL from [email protected]

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.039280000 probability, percentile 0.883810000 (date 2026-05-07)

Problem Types: CWE-20 | n/a

VersionSourceTypeScoreSeverityVector
3.0[email protected]Primary9.8CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
2.0[email protected]Primary7.5AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS v3.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Openstack Mitaka-murano All All All All
Application Openstack Murano All All All All
Application Openstack Murano-dashboard All All All All
Application Openstack Python-muranoclient All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
Bug #1586079 “YaqlYamlLoader inherits from YamlLoader” : Bugs : Murano af854a3a-2127-422b-91ae-364da2661108 bugs.launchpad.net Patch, Vendor Advisory
oss-security - RCE vulnerability in Openstack Murano using insecure YAML tags (CVE-2016-4972) af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Patch, Third Party Advisory
Bug #1586078 “YaqlYamlLoader inherits from YamlLoader " : Bugs : python-muranoclient af854a3a-2127-422b-91ae-364da2661108 bugs.launchpad.net Patch, Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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