CVE-2020-27781 Privilege escalation in Ceph
Attackers can steal Ceph credentials via OpenStack Manila to escalate privileges and access arbitrary resources, including admin accounts.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-27781?
CVE-2020-27781 is a high-severity vulnerability in Fedoraproject Fedora, published on 18 Dec 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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. This flaw affects Ceph versions prior to 14.2.16, 15.x prior to 15.2.8, and 16.x prior to 16.2.0.
Weakness: CWE-522
Which versions are affected by CVE-2020-27781?
It affects 5 products.
Linux distribution packages (8)
ceph SUSE:Enterprise Storage 6 | All versions | 14.2.16.402+g7d47dbaf4d-3.57.1 |
ceph SUSE:Enterprise Storage 7 | All versions | 15.2.8.80+g1f4b6229ca-3.13.1 |
ceph SUSE:Linux Enterprise Module for Basesystem 15 SP1 | All versions | 14.2.16.402+g7d47dbaf4d-3.57.1 |
ceph SUSE:Linux Enterprise Module for Basesystem 15 SP2 | All versions | 15.2.8.80+g1f4b6229ca-3.13.1 |
ceph openSUSE:Leap 15.1 | All versions | 14.2.16.402+g7d47dbaf4d-lp151.2.31.1 |
ceph-test openSUSE:Leap 15.1 | All versions | 14.2.16.402+g7d47dbaf4d-lp151.2.31.1 |
ceph openSUSE:Leap 15.2 | All versions | 15.2.8.80+g1f4b6229ca-lp152.2.9.1 |
ceph-test openSUSE:Leap 15.2 | All versions | 15.2.8.80+g1f4b6229ca-lp152.2.9.1 |
Products include Fedoraproject Fedora, Redhat Ceph, Redhat Ceph Storage, Redhat Openshift Container Platform, Redhat Openstack Platform.
How do I fix CVE-2020-27781?
Upgrade to a fixed version.
Is CVE-2020-27781 being exploited?
There is no known exploitation of CVE-2020-27781 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as DEBIAN-CVE-2020-27781, GHSA-mh9p-7vgq-83jw, SUSE-SU-2020:3895-1, SUSE-SU-2021:0023-1, UBUNTU-CVE-2020-27781, openSUSE-SU-2020:2327-1 and 1 more.