This advisory discloses a security issue of critical severity affecting Backbone Issue Sync, and provides a step-by-step guide to help you rectify the issue. The following apps and versions are affected:
Backbone Issue Sync, version 3.5.0 or later, fixed with 3.9.3 and 4.0.1
After updating this app to the fixed version, your Jira instance is no longer affected by this security issue.
K15t Software rates the severity level of this issue as critical, as a remote attacker is able to execute code on your system.
This is our baseline assessment – it's best if you evaluate its applicability to your own IT environment.
Backbone Issue Sync is affected by a remote code execution vulnerability that enables attackers to execute arbitrary code on your system. This can be used for example, but is not limited to:
Elevation of user privileges
Installation of additional malicious apps
Access to and modification of Jira content without further permission checks
Any Jira project admin who is able to configure a Backbone synchronization is able to exploit this bug.
We have taken the following steps to address this issue:
Released fixed versions of Backbone Issue Sync on Atlassian Marketplace
Informed all app customers and evaluators who might have been affected
A Jira administrator needs to upgrade Backbone Issue Sync to these (or later) versions:
Backbone Issue Sync, version 3.9.3, version 4.0.1 or later
We apologize deeply for any inconvenience this issue has caused you. If you would like assistance in correcting it, then we are here to help.
In case you have any questions or want to get support in fixing the issue on your system please let us know at firstname.lastname@example.org.