Due to an issue with incorrect sudo permissions, Zimbra Collaboration Suite (ZCS) suffers from a local privilege escalation issue in versions 9.0.0 and prior, where the zimbra user can effectively coerce postfix into running arbitrary commands as root.
Weakness
The product does not drop privileges before passing control of a resource to an actor that does not have those privileges.
Affected Software
| Name |
Vendor |
Start Version |
End Version |
| Zimbra_collaboration_suite |
Synacor |
* |
9.0.0 (including) |
Potential Mitigations
- Compartmentalize the system to have “safe” areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area.
- Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.
References