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    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.

    Published:Feb 11, 2021
    Last Modified:Nov 21, 2024
    EPS:Feb 11, 2021
    EPSS Score:0.06852
    CVSS Score:6.1

    Affected Products

    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Rubyonrails
    Product
    Rails

    Exploits

    http://www.openwall.com/lists/oss-security/2021/12/14/5https://hackerone.com/reports/1047447http://www.openwall.com/lists/oss-security/2021/12/14/5https://hackerone.com/reports/1047447

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-178 Cross-Site Flashing

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    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/

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High