TightVNC before v2.8.75 allows attackers to escalate privileges on the host operating system via replacing legitimate files with crafted files when executing a file transfer. This is due to the fact that TightVNC runs in the backend as a high-privileges account.
Weakness
The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Tightvnc | Tightvnc | * | 2.8.75 (excluding) |
| Tightvnc | Ubuntu | trusty | * |
| Tightvnc | Ubuntu | xenial | * |
Potential Mitigations
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/122.html
- https://cwe.mitre.org/data/definitions/233.html
- https://cwe.mitre.org/data/definitions/58.html
References
- https://medium.com/nestedif/vulnerability-disclosure-privilege-escalation-tightvnc-8165208cce
- https://www.tightvnc.com/news.php
- https://www.tightvnc.com/whatsnew.php
- https://medium.com/nestedif/vulnerability-disclosure-privilege-escalation-tightvnc-8165208cce
- https://www.tightvnc.com/news.php
- https://www.tightvnc.com/whatsnew.php