Vulnerability Details CVE-2021-22881
The Host Authorization middleware in Action Pack before 6.1.2.1, 6.0.3.5 suffers from an open redirect vulnerability. Specially crafted `Host` headers in combination with certain "allowed host" formats can cause the Host Authorization middleware in Action Pack to redirect users to a malicious website. Impacted applications will have allowed hosts with a leading dot. When an allowed host contains a leading dot, a specially crafted `Host` header can be used to redirect to a malicious website.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.069
EPSS Ranking 91.0%
CVSS Severity
CVSS v3 Score 6.1
CVSS v2 Score 5.8
References
- http://www.openwall.com/lists/oss-security/2021/05/05/2
- http://www.openwall.com/lists/oss-security/2021/08/20/1
- http://www.openwall.com/lists/oss-security/2021/12/14/5
- https://benjamin-bouchet.com/cve-2021-22881-faille-de-securite-dans-le-middleware-hostauthorization/
- https://discuss.rubyonrails.org/t/cve-2021-22881-possible-open-redirect-in-host-authorization-middleware/77130
- https://hackerone.com/reports/1047447
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XQ3NS4IBYE2I3MVMGAHFZBZBIZGHXHT3/
- http://www.openwall.com/lists/oss-security/2021/05/05/2
- http://www.openwall.com/lists/oss-security/2021/08/20/1
- http://www.openwall.com/lists/oss-security/2021/12/14/5
- https://benjamin-bouchet.com/cve-2021-22881-faille-de-securite-dans-le-middleware-hostauthorization/
- https://discuss.rubyonrails.org/t/cve-2021-22881-possible-open-redirect-in-host-authorization-middleware/77130
- https://hackerone.com/reports/1047447
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XQ3NS4IBYE2I3MVMGAHFZBZBIZGHXHT3/
Products affected by CVE-2021-22881
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cpe:2.3:a:rubyonrails:rails:6.0.0
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cpe:2.3:a:rubyonrails:rails:6.0.1
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cpe:2.3:a:rubyonrails:rails:6.0.2
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cpe:2.3:a:rubyonrails:rails:6.0.2.1
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cpe:2.3:a:rubyonrails:rails:6.0.2.2
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cpe:2.3:a:rubyonrails:rails:6.0.3
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cpe:2.3:a:rubyonrails:rails:6.0.3.1
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cpe:2.3:a:rubyonrails:rails:6.0.3.2
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cpe:2.3:a:rubyonrails:rails:6.0.3.3
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cpe:2.3:a:rubyonrails:rails:6.0.3.4
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cpe:2.3:a:rubyonrails:rails:6.1.0
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cpe:2.3:a:rubyonrails:rails:6.1.1
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cpe:2.3:a:rubyonrails:rails:6.1.2
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cpe:2.3:o:fedoraproject:fedora:33