CVE-2021-3524

Publication date 17 May 2021

Last updated 25 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

6.5 · Medium

Score breakdown

A flaw was found in the Red Hat Ceph Storage RadosGW (Ceph Object Gateway) in versions before 14.2.21. The vulnerability is related to the injection of HTTP headers via a CORS ExposeHeader tag. The newline character in the ExposeHeader tag in the CORS configuration file generates a header injection in the response when the CORS request is made. In addition, the prior bug fix for CVE-2020-10753 did not account for the use of \r as a header separator, thus a new flaw has been created.

From the Ubuntu Security Team

Sergey Bobrov discovered that Ceph's RadosGW (Ceph Object Gateway) allowed the injection of HTTP headers in responses to CORS requests. An attacker could use this to violate system integrity.

Read the notes from the security team

Status

Package Ubuntu Release Status
ceph 25.04 plucky
Fixed 16.2.4-0ubuntu1
24.10 oracular
Fixed 16.2.4-0ubuntu1
24.04 LTS noble
Fixed 16.2.4-0ubuntu1
23.10 mantic
Fixed 16.2.4-0ubuntu1
23.04 lunar
Fixed 16.2.4-0ubuntu1
22.10 kinetic
Fixed 16.2.4-0ubuntu1
22.04 LTS jammy
Fixed 16.2.4-0ubuntu1
21.10 impish
Fixed 16.2.4-0ubuntu1
21.04 hirsute
Fixed 16.2.6-0ubuntu0.21.04.2
20.10 groovy
Fixed 15.2.12-0ubuntu0.20.10.1
20.04 LTS focal
Fixed 15.2.12-0ubuntu0.20.04.1
18.04 LTS bionic
Fixed 12.2.13-0ubuntu0.18.04.10
16.04 LTS xenial
Fixed 10.2.11-0ubuntu0.16.04.3+esm2
14.04 LTS trusty
Not affected

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Notes

mdeslaur

this is fixed in 16.2.4 in hirsute-updates but has not been pushed to the security pocket

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
ceph

Severity score breakdown

Parameter Value
Base score 6.5 · Medium
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality None
Integrity impact High
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

References

Related Ubuntu Security Notices (USN)

Other references