CVE-2020-27781

Published: 18 December 2020

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.

From the Ubuntu security team

Goutham Pacha Ravi, Jahson Babel, and John Garbutt discovered that user credentials in Ceph could be manipulated in certain environments. An attacker could use this to gain unintended access to resources.

Priority

Medium

CVSS 3 base score: 7.1

Status

Package Release Status
ceph
Launchpad, Ubuntu, Debian
Upstream
Released (15.2.8)
Ubuntu 21.10 (Impish Indri)
Released (16.2.0-0ubuntu1)
Ubuntu 21.04 (Hirsute Hippo)
Released (16.2.0-0ubuntu1)
Ubuntu 20.04 LTS (Focal Fossa)
Released (15.2.12-0ubuntu0.20.04.1)
Ubuntu 18.04 LTS (Bionic Beaver) Needed

Ubuntu 16.04 ESM (Xenial Xerus) Needed

Ubuntu 14.04 ESM (Trusty Tahr) Needs triage

Patches:
Upstream: https://github.com/ceph/ceph/commit/1b8a634fdcd94dfb3ba650793fb1b6d09af65e05 (octopus) (15.2.8)
Upstream: https://github.com/ceph/ceph/commit/7e3e4e73783a98bb07ab399438eb3aab41a6fc8b (nautilus)
Upstream: https://github.com/ceph/ceph/commit/956ceb853a58f6b6847b31fac34f2f0228a70579 (luminous) (12.x)