Vulnerability Description
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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Rubyonrails | Rails | >= 6.0.0, < 6.0.3.5 |
| Fedoraproject | Fedora | 33 |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2021/05/05/2Mailing ListMitigationThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/08/20/1Mailing ListMitigationThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/12/14/5ExploitMailing ListPatch
- https://benjamin-bouchet.com/cve-2021-22881-faille-de-securite-dans-le-middlewarPatchThird Party Advisory
- https://discuss.rubyonrails.org/t/cve-2021-22881-possible-open-redirect-in-host-MitigationPatchVendor Advisory
- https://hackerone.com/reports/1047447ExploitPatchThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- http://www.openwall.com/lists/oss-security/2021/05/05/2Mailing ListMitigationThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/08/20/1Mailing ListMitigationThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/12/14/5ExploitMailing ListPatch
- https://benjamin-bouchet.com/cve-2021-22881-faille-de-securite-dans-le-middlewarPatchThird Party Advisory
- https://discuss.rubyonrails.org/t/cve-2021-22881-possible-open-redirect-in-host-MitigationPatchVendor Advisory
- https://hackerone.com/reports/1047447ExploitPatchThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
FAQ
What is CVE-2021-22881?
CVE-2021-22881 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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" format...
How severe is CVE-2021-22881?
CVE-2021-22881 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-22881?
Check the references section above for vendor advisories and patch information. Affected products include: Rubyonrails Rails, Fedoraproject Fedora.