ADVISORIES
GEM
SEVERITY
CVSS v3.x: 4.2 (Medium)
PATCHED VERSIONS
- >= 3.3.7
DESCRIPTION
Impact
Users who deployed message bus with diagnostics features enabled (default off) were
vulnerable to a path traversal bug, which could lead to disclosure of secret
information on a machine if an unintended user were to gain access to the diagnostic
route. The impact is also greater if there is no proxy for your web application as
the number of steps up the directories is not bounded. For deployments which uses a
proxy, the impact varies. For example, If a request goes through a proxy like Nginx
with merge_slashes enabled, the number of steps up the directories that can be
read is limited to 3 levels.
Workarounds
Disable MessageBus::Diagnostics in production like environments.