CVE-2020-7942: Medium severity puppet Puppet vulnerability
A flaw was found in Puppet, where changes in the application lead to node declarations having increased access. An attacker can use this flaw to modify run facts and to retrieve different nodes of information when the stricthostnamechecking is false, and the node's catalog falls back to the default node.
Other sources
Previously, Puppet operated on a model that a node with a valid certificate was entitled to all information in the system and that a compromised certificate allowed access to everything in the infrastructure. When a node's catalog falls back to the default node, the catalog can be retrieved for a different node by modifying facts for the Puppet run. This issue can be mitigated by setting stricthostnamechecking = true in puppet.conf on your Puppet master. Puppet 6.13.0 and 5.5.19 changes the default behavior for stricthostnamechecking from false to true. It is recommended that Puppet Open Source and Puppet Enterprise users that are not upgrading still set stricthostnamechecking to true to ensure secure behavior. Affected software versions: Puppet 6.x prior to 6.13.0 Puppet Agent 6.x prior to 6.13.0 Puppet 5.5.x prior to 5.5.19 Puppet Agent 5.5.x prior to 5.5.19 Resolved in: Puppet 6.13.0 Puppet Agent 6.13.0 Puppet 5.5.19 Puppet Agent 5.5.19
Previously, Puppet operated on a model that a node with a valid certificate was entitled to all information in the system and that a compromised certificate allowed access to everything in the infrastructure. When a node's catalog falls back to the default node, the catalog can be retrieved for a different node by modifying facts for the Puppet run. This issue can be mitigated by setting stricthostnamechecking = true in puppet.conf on your Puppet master. Puppet 6.13.0 changes the default behavior for stricthostnamechecking from false to true. It is recommended that Puppet Open Source and Puppet Enterprise users that are not upgrading still set stricthostnamechecking to true to ensure secure behavior.
References:
https://puppet.com/security/cve/CVE-2020-7942/
— Red Hat
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
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redhat/tfm-rubygem-i18nto a version that resolves this vulnerability.Fixed in 0:1.8.2-1.el7 - Upgrade
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redhat/tfm-rubygem-infobloxto a version that resolves this vulnerability.Fixed in 0:3.0.0-3.el7 - Upgrade
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redhat/tfm-rubygem-ipaddressto a version that resolves this vulnerability.Fixed in 0:0.8.0-11.el7 - Upgrade
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redhat/tfm-rubygem-jgrepto a version that resolves this vulnerability.Fixed in 0:1.3.3-12.el7 - Upgrade
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redhat/tfm-rubygem-journald-loggerto a version that resolves this vulnerability.Fixed in 0:2.0.4-2.el7 - Upgrade
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redhat/tfm-rubygem-journald-nativeto a version that resolves this vulnerability.Fixed in 0:1.0.11-2.el7 - Upgrade
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redhat/tfm-rubygem-jwtto a version that resolves this vulnerability.Fixed in 0:2.2.1-1.el7 - Upgrade
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redhat/tfm-rubygem-kafoto a version that resolves this vulnerability.Fixed in 0:4.1.0-3.el7 - Upgrade
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redhat/tfm-rubygem-katelloto a version that resolves this vulnerability.Fixed in 0:3.16.0.11-1.el7 - Upgrade
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redhat/tfm-rubygem-kubeclientto a version that resolves this vulnerability.Fixed in 0:4.3.0-1.el7 - Upgrade
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redhat/tfm-rubygem-little-pluggerto a version that resolves this vulnerability.Fixed in 0:1.1.4-1.el7 - Upgrade
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redhat/tfm-rubygem-localeto a version that resolves this vulnerability.Fixed in 0:2.0.9-13.el7 - Upgrade
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redhat/tfm-rubygem-loggingto a version that resolves this vulnerability.Fixed in 0:2.2.2-6.el7 - Upgrade
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redhat/tfm-rubygem-logging-journaldto a version that resolves this vulnerability.Fixed in 0:2.0.0-2.el7 - Upgrade
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redhat/tfm-rubygem-loofahto a version that resolves this vulnerability.Fixed in 0:2.4.0-1.el7 - Upgrade
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redhat/tfm-rubygem-mailto a version that resolves this vulnerability.Fixed in 0:2.7.1-1.el7 - Upgrade
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redhat/tfm-rubygem-marcelto a version that resolves this vulnerability.Fixed in 0:0.3.3-1.el7 - Upgrade
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redhat/tfm-rubygem-memoistto a version that resolves this vulnerability.Fixed in 0:0.16.0-1.el7 - Upgrade
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redhat/tfm-rubygem-mimemagicto a version that resolves this vulnerability.Fixed in 0:0.3.5-1.el7 - Upgrade
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redhat/tfm-rubygem-mime-typesto a version that resolves this vulnerability.Fixed in 0:3.2.2-4.el7 - Upgrade
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redhat/tfm-rubygem-mime-types-datato a version that resolves this vulnerability.Fixed in 0:3.2018.0812-4.el7 - Upgrade
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redhat/tfm-rubygem-multipart-postto a version that resolves this vulnerability.Fixed in 0:2.0.0-1.el7 - Upgrade
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redhat/tfm-rubygem-mustermannto a version that resolves this vulnerability.Fixed in 0:1.0.2-4.el7 - Upgrade
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redhat/tfm-rubygem-net-ldapto a version that resolves this vulnerability.Fixed in 0:0.16.1-1.el7 - Upgrade
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redhat/tfm-rubygem-net-pingto a version that resolves this vulnerability.Fixed in 0:2.0.1-3.el7 - Upgrade
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redhat/tfm-rubygem-netrcto a version that resolves this vulnerability.Fixed in 0:0.11.0-3.el7 - Upgrade
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redhat/tfm-rubygem-net-scpto a version that resolves this vulnerability.Fixed in 0:1.2.1-3.el7 - Upgrade
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redhat/tfm-rubygem-net-sshto a version that resolves this vulnerability.Fixed in 0:4.2.0-1.el7 - Upgrade
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redhat/tfm-rubygem-net-ssh-krbto a version that resolves this vulnerability.Fixed in 0:0.4.0-3.el7 - Upgrade
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redhat/tfm-rubygem-nio4rto a version that resolves this vulnerability.Fixed in 0:2.5.2-2.el7 - Upgrade
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redhat/tfm-rubygem-nokogirito a version that resolves this vulnerability.Fixed in 0:1.10.9-1.el7 - Upgrade
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redhat/tfm-rubygem-oauthto a version that resolves this vulnerability.Fixed in 0:0.5.4-3.el7 - Upgrade
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redhat/tfm-rubygem-openscapto a version that resolves this vulnerability.Fixed in 0:0.4.9-3.el7 - Upgrade
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redhat/tfm-rubygem-optimistto a version that resolves this vulnerability.Fixed in 0:3.0.0-1.el7 - Upgrade
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redhat/tfm-rubygem-osto a version that resolves this vulnerability.Fixed in 0:1.0.0-1.el7 - Upgrade
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redhat/tfm-rubygem-ovirt-engine-sdkto a version that resolves this vulnerability.Fixed in 0:4.2.3-3.el7 - Upgrade
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redhat/tfm-rubygem-parse-cronto a version that resolves this vulnerability.Fixed in 0:0.1.4-4.el7 - Upgrade
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redhat/tfm-rubygem-passengerto a version that resolves this vulnerability.Fixed in 0:4.0.18-26.el7 - Upgrade
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redhat/tfm-rubygem-pgto a version that resolves this vulnerability.Fixed in 0:1.1.4-2.el7 - Upgrade
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redhat/tfm-rubygem-polyglotto a version that resolves this vulnerability.Fixed in 0:0.3.5-3.el7 - Upgrade
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redhat/tfm-rubygem-powerbarto a version that resolves this vulnerability.Fixed in 0:2.0.1-2.el7 - Upgrade
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redhat/tfm-rubygem-prometheus-clientto a version that resolves this vulnerability.Fixed in 0:1.0.0-1.el7 - Upgrade
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redhat/tfm-rubygem-promise.rbto a version that resolves this vulnerability.Fixed in 0:0.7.4-1.el7 - Upgrade
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redhat/tfm-rubygem-pumato a version that resolves this vulnerability.Fixed in 0:4.3.3-4.el7 - Upgrade
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redhat/tfm-rubygem-puma-plugin-systemdto a version that resolves this vulnerability.Fixed in 0:0.1.5-1.el7 - Upgrade
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redhat/tfm-rubygem-quantileto a version that resolves this vulnerability.Fixed in 0:0.2.0-3.el7 - Upgrade
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redhat/tfm-rubygem-rablto a version that resolves this vulnerability.Fixed in 0:0.14.3-1.el7 - Upgrade
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redhat/tfm-rubygem-rackto a version that resolves this vulnerability.Fixed in 0:2.2.3-1.el7 - Upgrade
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redhat/tfm-rubygem-rack-corsto a version that resolves this vulnerability.Fixed in 0:1.0.2-1.el7 - Upgrade
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redhat/tfm-rubygem-rack-jsonpto a version that resolves this vulnerability.Fixed in 0:1.3.1-9.el7 - Upgrade
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redhat/tfm-rubygem-rack-protectionto a version that resolves this vulnerability.Fixed in 0:2.0.3-4.el7 - Upgrade
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redhat/tfm-rubygem-rack-testto a version that resolves this vulnerability.Fixed in 0:1.1.0-4.el7 - Upgrade
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redhat/tfm-rubygem-railsto a version that resolves this vulnerability.Fixed in 0:6.0.3.1-1.el7 - Upgrade
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redhat/tfm-rubygem-rails-dom-testingto a version that resolves this vulnerability.Fixed in 0:2.0.3-6.el7 - Upgrade
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redhat/tfm-rubygem-rails-html-sanitizerto a version that resolves this vulnerability.Fixed in 0:1.3.0-1.el7 - Upgrade
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redhat/tfm-rubygem-rails-i18nto a version that resolves this vulnerability.Fixed in 0:6.0.0-2.el7 - Upgrade
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redhat/tfm-rubygem-railtiesto a version that resolves this vulnerability.Fixed in 0:6.0.3.1-1.el7 - Upgrade
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redhat/tfm-rubygem-rainbowto a version that resolves this vulnerability.Fixed in 0:2.2.1-5.el7 - Upgrade
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redhat/tfm-rubygem-rb-inotifyto a version that resolves this vulnerability.Fixed in 0:0.9.7-5.el7 - Upgrade
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redhat/tfm-rubygem-rbovirtto a version that resolves this vulnerability.Fixed in 0:0.1.7-4.el7 - Upgrade
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redhat/tfm-rubygem-rbvmomito a version that resolves this vulnerability.Fixed in 0:2.2.0-3.el7 - Upgrade
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redhat/tfm-rubygem-recursive-open-structto a version that resolves this vulnerability.Fixed in 0:1.1.0-1.el7 - Upgrade
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redhat/tfm-rubygem-redisto a version that resolves this vulnerability.Fixed in 0:4.1.2-2.el7 - Upgrade
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redhat/tfm-rubygem-representableto a version that resolves this vulnerability.Fixed in 0:3.0.4-1.el7 - Upgrade
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redhat/tfm-rubygem-respondersto a version that resolves this vulnerability.Fixed in 0:3.0.0-3.el7 - Upgrade
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redhat/tfm-rubygem-rest-clientto a version that resolves this vulnerability.Fixed in 0:2.0.2-3.el7 - Upgrade
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redhat/tfm-rubygem-retriableto a version that resolves this vulnerability.Fixed in 0:3.1.2-1.el7 - Upgrade
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redhat/tfm-rubygem-rkerberosto a version that resolves this vulnerability.Fixed in 0:0.1.5-18.el7 - Upgrade
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redhat/tfm-rubygem-roadieto a version that resolves this vulnerability.Fixed in 0:3.4.0-3.el7 - Upgrade
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redhat/tfm-rubygem-roadie-railsto a version that resolves this vulnerability.Fixed in 0:2.1.1-2.el7 - Upgrade
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redhat/tfm-rubygem-robotexto a version that resolves this vulnerability.Fixed in 0:1.0.0-21.el7 - Upgrade
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redhat/tfm-rubygem-rsecto a version that resolves this vulnerability.Fixed in 0:0.4.3-4.el7 - Upgrade
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redhat/tfm-rubygem-ruby2rubyto a version that resolves this vulnerability.Fixed in 0:2.4.2-3.el7 - Upgrade
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redhat/tfm-rubygem-rubyipmito a version that resolves this vulnerability.Fixed in 0:0.10.0-6.el7 - Upgrade
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redhat/tfm-rubygem-ruby-libvirtto a version that resolves this vulnerability.Fixed in 0:0.7.0-4.el7 - Upgrade
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redhat/tfm-rubygem-runcibleto a version that resolves this vulnerability.Fixed in 0:2.13.0-2.el7 - Upgrade
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redhat/tfm-rubygem-safemodeto a version that resolves this vulnerability.Fixed in 0:1.3.5-2.el7 - Upgrade
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redhat/tfm-rubygem-sequelto a version that resolves this vulnerability.Fixed in 0:5.7.1-2.el7 - Upgrade
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redhat/tfm-rubygem-sidekiqto a version that resolves this vulnerability.Fixed in 0:5.2.7-3.el7 - Upgrade
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redhat/tfm-rubygem-signetto a version that resolves this vulnerability.Fixed in 0:0.11.0-3.el7 - Upgrade
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redhat/tfm-rubygem-sinatrato a version that resolves this vulnerability.Fixed in 0:2.0.3-4.el7 - Upgrade
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redhat/tfm-rubygem-sprocketsto a version that resolves this vulnerability.Fixed in 0:3.7.2-6.el7 - Upgrade
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redhat/tfm-rubygem-sprockets-railsto a version that resolves this vulnerability.Fixed in 0:3.2.1-6.el7 - Upgrade
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redhat/tfm-rubygem-sqlite3to a version that resolves this vulnerability.Fixed in 0:1.3.13-5.el7 - Upgrade
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redhat/tfm-rubygem-sshkeyto a version that resolves this vulnerability.Fixed in 0:1.9.0-3.el7 - Upgrade
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redhat/tfm-rubygem-statsd-instrumentto a version that resolves this vulnerability.Fixed in 0:2.1.4-2.el7 - Upgrade
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redhat/tfm-rubygem-stompto a version that resolves this vulnerability.Fixed in 0:1.4.9-1.el7 - Upgrade
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redhat/tfm-rubygem-textto a version that resolves this vulnerability.Fixed in 0:1.3.0-7.el7 - Upgrade
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redhat/tfm-rubygem-thorto a version that resolves this vulnerability.Fixed in 0:1.0.1-2.el7 - Upgrade
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redhat/tfm-rubygem-tiltto a version that resolves this vulnerability.Fixed in 0:2.0.8-4.el7 - Upgrade
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redhat/tfm-rubygem-timelinessto a version that resolves this vulnerability.Fixed in 0:0.3.10-1.el7 - Upgrade
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redhat/tfm-rubygem-tzinfoto a version that resolves this vulnerability.Fixed in 0:1.2.6-1.el7 - Upgrade
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redhat/tfm-rubygem-uberto a version that resolves this vulnerability.Fixed in 0:0.1.0-1.el7 - Upgrade
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redhat/tfm-rubygem-unfto a version that resolves this vulnerability.Fixed in 0:0.1.3-7.el7 - Upgrade
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redhat/tfm-rubygem-unicodeto a version that resolves this vulnerability.Fixed in 0:0.4.4.4-1.el7 - Upgrade
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redhat/tfm-rubygem-webpack-railsto a version that resolves this vulnerability.Fixed in 0:0.9.8-6.el7 - Upgrade
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redhat/tfm-rubygem-websocket-driverto a version that resolves this vulnerability.Fixed in 0:0.7.1-1.el7 - Upgrade
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redhat/tfm-rubygem-websocket-extensionsto a version that resolves this vulnerability.Fixed in 0:0.1.5-1.el7 - Upgrade
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redhat/tfm-rubygem-x-editable-railsto a version that resolves this vulnerability.Fixed in 0:1.5.5-5.el7 - Upgrade
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redhat/tfm-rubygem-xmlrpcto a version that resolves this vulnerability.Fixed in 0:0.3.0-2.el7 - Upgrade
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redhat/tfm-rubygem-zeitwerkto a version that resolves this vulnerability.Fixed in 0:2.2.2-1.el7 - Upgrade
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redhat/puppetto a version that resolves this vulnerability.Fixed in 6.13.0 - Upgrade
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redhat/puppet-agentto a version that resolves this vulnerability.Fixed in 6.13.0 - Upgrade
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Puppetto a version that resolves this vulnerability.Fixed in 6.13.0 - Upgrade
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Puppet Agentto a version that resolves this vulnerability.Fixed in 6.13.0 - Upgrade
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Puppetto a version that resolves this vulnerability.Fixed in 5.5.19 - Upgrade
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Puppet Agentto a version that resolves this vulnerability.Fixed in 5.5.19 - Configuration
In the puppet.conf configuration file, set `strict_hostname_checking = true` (this mitigates the issue when `strict_hostname_checking` is false and the node catalog falls back to the `default` node).
Puppet (puppet.conf on Puppet master) strict_hostname_checking = true - Configuration
If you are not upgrading Puppet, still set `strict_hostname_checking = true` to ensure secure behavior.
Puppet (puppet.conf; non-upgraded users) strict_hostname_checking = true
Event History
Frequently Asked Questions
What is the severity of CVE-2020-7942?
CVE-2020-7942 is classified as a medium severity vulnerability due to its potential for unauthorized access to node declarations.
How do I fix CVE-2020-7942?
To mitigate CVE-2020-7942, upgrade to the recommended version of Puppet that addresses this vulnerability.
What versions of Puppet are affected by CVE-2020-7942?
Puppet versions earlier than 6.13.0 and 5.5.19 are affected by CVE-2020-7942.
What type of vulnerability is CVE-2020-7942?
CVE-2020-7942 is a privilege escalation vulnerability caused by improper access controls in Puppet.
Can CVE-2020-7942 allow attackers to access sensitive information?
Yes, CVE-2020-7942 can allow attackers to retrieve sensitive node information if strict hostname checking is disabled.