CVE-2020-27781: High severity redhat Ceph vulnerability
User credentials can be manipulated and stolen by Native CephFS consumers of OpenStack Manila, resulting in potential privilege escalation. An Open Stack Manila user can request access to a share to an arbitrary cephx user, including existing users. The access key is retrieved via the interface drivers. Then, all users of the requesting OpenStack project can view the access key. This enables the attacker to target any resource that the user has access to. This can be done to even "admin" users, compromising the ceph administrator.
Other sources
User credentials can be manipulated and stolen by Native CephFS consumers of OpenStack Manila. An OpenStack Manila user can request access to a share to any arbitrary cephx user, including privileged pre-existing users and the interface drivers will retrieve the access key of that user along with providing access to the share. This is then visible to all users of the OpenStack project that owns the share.
— Red Hat
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
redhat/cephto a version that resolves this vulnerability.Fixed in 2:12.2.12-139.el7c - Upgrade
Upgrade
redhat/ceph-ansibleto a version that resolves this vulnerability.Fixed in 0:3.2.56-1.el7c - Upgrade
Upgrade
redhat/cephmetricsto a version that resolves this vulnerability.Fixed in 0:2.0.10-1.el7c - Upgrade
Upgrade
redhat/grafanato a version that resolves this vulnerability.Fixed in 0:5.2.4-3.el7c - Upgrade
Upgrade
redhat/tcmu-runnerto a version that resolves this vulnerability.Fixed in 0:1.4.0-3.el7c - Upgrade
Upgrade
redhat/cephto a version that resolves this vulnerability.Fixed in 2:14.2.11-95.el7c - Upgrade
Upgrade
redhat/Cephto a version that resolves this vulnerability.Fixed in 15.2.8 - Upgrade
Upgrade
redhat/Cephto a version that resolves this vulnerability.Fixed in 14.2.16 - Upgrade
Upgrade
Cephto a version that resolves this vulnerability.Fixed in 14.2.16 - Upgrade
Upgrade
Cephto a version that resolves this vulnerability.Fixed in 15.2.8 - Upgrade
Upgrade
Cephto a version that resolves this vulnerability.Fixed in 16.2.0
Event History
Parent advisories
This vulnerability appears in the following advisories.
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2020-27781.
What software is affected by this vulnerability?
The affected software includes Ceph versions up to 15.2.8, 14.2.16, and 2:12.2.12-139.el7c, as well as ceph-ansible, cephmetrics, grafana, and tcmu-runner versions mentioned in the description.
What is the severity of CVE-2020-27781?
The severity of CVE-2020-27781 is high with a CVSS score of 7.1.
How can I fix CVE-2020-27781?
To fix CVE-2020-27781, update your Ceph software to version 15.2.8, 14.2.16, or 2:12.2.12-139.el7c, or apply the necessary updates for ceph-ansible, cephmetrics, grafana, and tcmu-runner as mentioned in the description.
Where can I find more information about CVE-2020-27781?
You can find more information about CVE-2020-27781 in the references: [Bugzilla](https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1908864) and [GitHub commits](https://github.com/ceph/ceph/commit/1b8a634fdcd94dfb3ba650793fb1b6d09af65e05, https://github.com/ceph/ceph/commit/7e3e4e73783a98bb07ab399438eb3aab41a6fc8b).