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.

CVSS v3 6.1 MEDIUM
CVSS v2.0 5.8 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

5.8^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:P/I:P/A:N

Exploitability : 8.6 / Impact : 4.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
http://www.openwall.com/lists/oss-security/2021/05/05/2	Mailing List Mitigation Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/08/20/1	Mailing List Mitigation Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/12/14/5	Exploit Mailing List Patch
https://benjamin-bouchet.com/cve-2021-22881-faille-de-securite-dans-le-middleware-hostauthorization/	Patch Third Party Advisory
https://discuss.rubyonrails.org/t/cve-2021-22881-possible-open-redirect-in-host-authorization-middleware/77130	Mitigation Patch Vendor Advisory
https://hackerone.com/reports/1047447	Exploit Patch Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XQ3NS4IBYE2I3MVMGAHFZBZBIZGHXHT3/

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:rubyonrails:rails::::::::
	cpe:2.3:a:rubyonrails:rails::::::::

Configuration 2 (hide)

cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*

History

No history.

Information

Published : 2021-02-11 18:15

Updated : 2023-11-07 03:30

NVD link : CVE-2021-22881

Mitre link : CVE-2021-22881

CVE.ORG link : CVE-2021-22881

JSON object : View

Products Affected

rubyonrails

rails

fedoraproject

fedora

CWE

CWE-601

URL Redirection to Untrusted Site ('Open Redirect')

{"id": "CVE-2021-22881", "cveTags": [], "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 5.8, "accessVector": "NETWORK", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "MEDIUM", "availabilityImpact": "NONE", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 4.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 8.6, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": true}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 6.1, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 2.7, "exploitabilityScore": 2.8}]}, "published": "2021-02-11T18:15:17.460", "references": [{"url": "http://www.openwall.com/lists/oss-security/2021/05/05/2", "tags": ["Mailing List", "Mitigation", "Third Party Advisory"], "source": "support@hackerone.com"}, {"url": "http://www.openwall.com/lists/oss-security/2021/08/20/1", "tags": ["Mailing List", "Mitigation", "Third Party Advisory"], "source": "support@hackerone.com"}, {"url": "http://www.openwall.com/lists/oss-security/2021/12/14/5", "tags": ["Exploit", "Mailing List", "Patch"], "source": "support@hackerone.com"}, {"url": "https://benjamin-bouchet.com/cve-2021-22881-faille-de-securite-dans-le-middleware-hostauthorization/", "tags": ["Patch", "Third Party Advisory"], "source": "support@hackerone.com"}, {"url": "https://discuss.rubyonrails.org/t/cve-2021-22881-possible-open-redirect-in-host-authorization-middleware/77130", "tags": ["Mitigation", "Patch", "Vendor Advisory"], "source": "support@hackerone.com"}, {"url": "https://hackerone.com/reports/1047447", "tags": ["Exploit", "Patch", "Third Party Advisory"], "source": "support@hackerone.com"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XQ3NS4IBYE2I3MVMGAHFZBZBIZGHXHT3/", "source": "support@hackerone.com"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-601"}]}, {"type": "Secondary", "source": "support@hackerone.com", "description": [{"lang": "en", "value": "CWE-601"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "El middleware de Autorizaci\u00f3n de Host en Action Pack versiones anteriores a 6.1.2.1, 6.0.3.5 sufre una vulnerabilidad de redireccionamiento abierto. Los encabezados \"Host\" especialmente dise\u00f1ados en combinaci\u00f3n con determinados formatos \"allowed host\" pueden causar que el middleware de Autorizaci\u00f3n del Host en Action Pack redireccione a los usuarios a un sitio web malicioso. Las aplicaciones afectadas habr\u00e1n permitido hosts con un punto inicial. Cuando un host permitido contiene un punto inicial, un encabezado \"Host\" especialmente dise\u00f1ado puede ser usado para redireccionar hacia un sitio web malicioso"}], "lastModified": "2023-11-07T03:30:27.547", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "817BE0F5-136C-460E-816D-74B3F6663BA8", "versionEndExcluding": "6.0.3.5", "versionStartIncluding": "6.0.0"}, {"criteria": "cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "98CE6993-089E-454B-8156-011E03FC3C94", "versionEndExcluding": "6.1.2.1", "versionStartIncluding": "6.1.0"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E460AA51-FCDA-46B9-AE97-E6676AA5E194"}], "operator": "OR"}]}], "sourceIdentifier": "support@hackerone.com"}