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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 Severity Score

7.1

Score breakdown

Status

Package Release Status
ceph
Launchpad, Ubuntu, Debian
bionic
Released (12.2.13-0ubuntu0.18.04.10)
focal
Released (15.2.12-0ubuntu0.20.04.1)
groovy
Released (15.2.12-0ubuntu0.20.10.1)
hirsute
Released (16.2.0-0ubuntu1)
impish
Released (16.2.0-0ubuntu1)
jammy
Released (16.2.0-0ubuntu1)
kinetic
Released (16.2.0-0ubuntu1)
lunar
Released (16.2.0-0ubuntu1)
trusty Needed

upstream
Released (15.2.8)
xenial Needed

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)

Severity score breakdown

Parameter Value
Base score 7.1
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact None
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N