CVE-2020-27781

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-12-18 · updated 2026-06-17
Weakness: CWE-522

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.

Affected products

Fedoraproject Fedora: 33
ceph: before 14.2.16; from 15.0.0 before 15.2.8; from 16.0.0 before 16.2.0 — fixed in 14.2.16, 15.2.8, 16.2.0
Red Hat Ceph Storage: 2.0, 3.0, 4.0
Red Hat OpenShift Container Platform 4.18: 4.0
nova_libvirt container provided by the Red Hat OpenStack Platform: 13.0

How to fix

Upgrade to a fixed version: ceph 14.2.16, 15.2.8, 16.2.0. Check the vendor advisory for mitigations.

References

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