Veeam ONE Remote Code Execution Vulnerabilities

Challenge

Vulnerabilities in Veeam ONE Agent components residing on Veeam ONE and Veeam Backup & Replication servers allow executing malicious code remotely without authentication. This may lead to gaining control over the target system.
Severity: critical CVSS v3 score: 9.8

Cause

Veeam ONE Agent uses .NET data serialization mechanisms. The remote attacker may send malicious code to the TCP port opened by Veeam ONE Agent (TCP 2805 by default) which will not be deserialized properly. The deserialization of untrusted data is performed during TLS Handshake (vulnerability tracked as ZDI-CAN-10400and CVE-2020-10914) and during logging of error messages (vulnerability tracked asZDI-CAN-10401 andCVE-2020-10915).

Solution

Hotfixes are available for the following Veeam ONE versions:

• 10 (build 10.0.0.750)
• 9.5 Update 4a (build 9.5.4.4587)
  NOTE: These hotfixes are not compatible with version 9.5 Update 4 (build 9.5.4.4566). Customers running this version are advised to upgrade to version 10 or 9.5 Update 4a using updated ISO images.

The hotfix must be installed on the Veeam ONE server. Veeam ONE Agents on the Veeam Backup & Replication servers will be updated automatically after installing the hotfix. After applying the updates your Veeam ONE Agent version will be 10.0.1.750 on Veeam ONE version 10 servers and9.5.5.4587 on Veeam ONE 9.5 Update 4a servers.

Please note, that all new deployments of Veeam ONE version 10 and version 9.5 Update 4a installed using the ISO images downloaded after 04/15/2020 are not vulnerable.

More Information

These vulnerabilities were discovered by:
Michael Zanetta & Edgar Boda-Majer from Bugscale working with Trend Micro Zero Day Initiative.

DOWNLOAD HOTFIX FOR Veeam ONE 10

MD5: 39ca33e5c9c0fec534ad5d2e87987985 SHA1: f42676d7997d57504944f02116e842b7ce4f3358

DOWNLOAD HOTFIX FOR Veeam ONE 9.5 U4a

MD5: 89817e0eeac0d0434218b928a1d0e918 SHA1: a78af22d463be8c0d2255cfdf732f210298a251d

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