.. _CVE-2021-3524:

CVE-2021-3524: HTTP header injects via CORS in RGW

• NIST information page <https://nvd.nist.gov/vuln/detail/CVE-2021-3524>_

A flaw was found in the radosgw. The vulnerability is related to the injection of HTTP headers via a CORS ExposeHeader tag. The \r character in the ExposeHeader tag in the CORS configuration file generates a header injection in the response when the CORS request is made.

Fixed versions

• Pacific v16.2.4 (and later)
• Octopus v15.2.12 (and later)
• Nautilus v14.2.21 (and later)

Recommendations

All users of Ceph object storage (RGW) should upgrade.

Acknowledgements

Red Hat would like to thank Sergey Bobrov (Kaspersky) for reporting this issue.