CVE-2020-5217: Directive injection when using dynamic overrides with user input in RubyGems secure_headers
A flaw was found in rubygem-secureheaders in versions prior to 6.2.0, 5.1.0, and 3.8.0. If user-supplied input was passed into append/overridecontentsecuritypolicydirectives, a semicolon could be injected leading to directive injection which could be used to override a script-src directive. The highest threat from this vulnerability is to data integrity.
Other sources
In Secure Headers (RubyGem secureheaders), a directive injection vulnerability is present in versions before 3.8.0, 5.1.0, and 6.2.0. If user-supplied input was passed into append/overridecontentsecuritypolicydirectives, a semicolon could be injected leading to directive injection. This could be used to e.g. override a script-src directive. Duplicate directives are ignored and the first one wins. The directives in secureheaders are sorted alphabetically so they pretty much all come before script-src. A previously undefined directive would receive a value even if SecureHeaders::OPTOUT was supplied. The fixed versions will silently convert the semicolons to spaces and emit a deprecation warning when this happens. This will result in innocuous browser console messages if being exploited/accidentally used. In future releases, we will raise application errors resulting in 500s. Depending on what major version you are using, the fixed versions are 6.2.0, 5.1.0, 3.8.0.
Affected Software
Remediation
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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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rubygem-secure_headersto a version that resolves this vulnerability.Fixed in 6.2.0 - Upgrade
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rubygem-secure_headersto a version that resolves this vulnerability.Fixed in 5.1.0 - Upgrade
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rubygem-secure_headersto a version that resolves this vulnerability.Fixed in 3.8.0 - Compensating control
If using dynamic overrides with user input passed into append/override_content_security_policy_directives, do not allow user-supplied values to include semicolons (";") so they cannot be injected to override CSP directives (e.g., script-src).
Event History
Frequently Asked Questions
What is the severity of CVE-2020-5217?
The severity of CVE-2020-5217 is classified as high due to the potential for directive injection in content security policy.
How do I fix CVE-2020-5217?
To fix CVE-2020-5217, upgrade to versions 6.2.0 or later, 5.1.0 or later, or 3.8.0 or later of rubygem-secure_headers.
What causes CVE-2020-5217?
CVE-2020-5217 is caused by improper handling of user-supplied input in the append/override_content_security_policy_directives method.
Which applications are affected by CVE-2020-5217?
Applications utilizing versions of the rubygem-secure_headers prior to 6.2.0, 5.1.0, or 3.8.0 are affected by CVE-2020-5217.
Is CVE-2020-5217 a remotely exploitable vulnerability?
CVE-2020-5217 requires an attacker to inject content through user-supplied input, which may not be directly remotely exploitable but poses a significant risk.