DIVD-2021-00014 - Kaseya Unitrends
| Our reference | DIVD-2021-00014 |
| Case lead | Frank Breedijk |
| Author | Victor Gevers and Frank Breedijk |
| Researcher(s) | |
| CVE(s) | |
| Product | Kaseya Unitrends |
| Versions |
|
| Recommendation | Patch the client and server components to the latest version. We recommend not to expose this service or the clients directly to the internet but to use additional access control measures in front of it. |
| Patch status | Patches available |
| Workaround | Workaround available for the client, in Kaseya knowledge base |
| Status | Closed |
| Last modified | 05 Jul 2023 11:20 CEST |
Summary
A DIVD researcher has identified three vulnerabilities in the Kaseya Unitrends backup product.
Server software prior to v10.5.5-2 is vulnerable to:
- CVE-2021-40385, a privilege escaltion vulnerability from read-only user to admin, and
- CVE-2021-40387, an authenticated remote code execution vulnerability
Client software prior to v10.6.2 is vulnerable to:
- CVE-2021-40386, a remote code execution
What you can do
Patch server software to at least version 10.5.5-2 to remove these vulnerabilities. As per Kaseya’s firewall requirements you are strongly advised not to expose this product to public internet.
patch clients softwate to at least version 10.6.2. The client side vulnerability can also be mitigated with firewall rules. Filter traffic to and from the client using the recommended mitigation from the knowledge base article.
What we were doing
The Dutch Institute for Vulnerability Disclosure (DIVD) performed a scan to detect vulnerable Kaseya Unitrends servers and notify the owners directly or via the known abuse channels, Gov-CERTs and CSIRTs, and other trusted channels.
Timeline
| Date | Description |
|---|---|
| 02 Jul 2021 | Vulnerabilities discovered. |
| 03 Jul 2021 | Vendor informed. |
|
03 Jul 2021- 04 Jul 2021 |
Time to acknowledge security issue |
| 14 Jul 2021 | Scanning internet-facing implementations. |
| 15 Jul 2021 | Start of the identification of possible vulnerable internet-facing systems. |
|
03 Jul 2021- 12 Aug 2021 |
Time to fix server side vulnerabilities |
| 12 Aug 2021 | Patches released for the Unitrends server (v10.5.5-2) that address CVE-2021-40385 and CVE-2021-40387 |
| 01 Sep 2021 | CVE records published by Mitre |
| 06 Sep 2021 | Added official CVE numbers to this case and site |
|
04 Jul 2021- 06 Apr 2022 |
Time to fix client side vulnerabilities |
| 06 Apr 2022 | Patches released for the Unitrends client (v10.6.2) that (silently) address CVE-2021-40386 |
| 05 Jul 2023 | Case closed |