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CVE-2020-27839

Published: 26 May 2021

A flaw was found in ceph-dashboard. The JSON Web Token (JWT) used for user authentication is stored by the frontend application in the browser’s localStorage which is potentially vulnerable to attackers via XSS attacks. The highest threat from this vulnerability is to data confidentiality and integrity.

From the Ubuntu Security Team

It was discovered that the Ceph dashboard was susceptible to a cross-site scripting attack. An attacker could use this to expose sensitive information or gain unintended access.

Priority

Medium

Cvss 3 Severity Score

5.4

Score breakdown

Status

Package Release Status
ceph
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(12.2.13-0ubuntu0.18.04.8)
trusty Not vulnerable

upstream
Released (16.1.0,15.2.9)
focal
Released (15.2.12-0ubuntu0.20.04.1)
groovy
Released (15.2.12-0ubuntu0.20.10.1)
hirsute
Released (16.1.0-0ubuntu2)
xenial Not vulnerable

impish
Released (16.1.0-0ubuntu2)
jammy
Released (16.1.0-0ubuntu2)
Patches:
upstream: https://github.com/ceph/ceph/commit/23f2604d6f9ac16779b4ac43aab6e4e434f2e8ec
upstream: https://github.com/ceph/ceph/commit/e5501a34ee8237dfe64104c612c812b16121db6d (octopus)

Severity score breakdown

Parameter Value
Base score 5.4
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction Required
Scope Changed
Confidentiality Low
Integrity impact Low
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N