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During internal testing, a vulnerability was discovered within the Veeam Updater component of Veeam Backup for Microsoft Azure that allows users to bypass authentication mechanisms and execute arbitrary code. At this time, there is no evidence that this has been exploited in the wild. Severity: CriticalCVSS v3 Score: 10.0Status: Resolved
A fix has been released to resolve the discovered vulnerability in Veeam Backup for Microsoft Azure versions 2 and 3. For most users, no actions will be needed, as the Veeam Updater component will have automatically installed this fix during its daily check for updates1. However, for environments where the Veeam Backup for Microsoft Azure backup appliance does not have access to repository.veeam.com, the fix will have to be manually deployed2 or internet access configured to allow access to the update server. The Veeam Updater component version is displayed in the top-right of the web interface.3 The vulnerability documented in this article is corrected starting in Veeam Updater version 5.0.0.633.
1 The Veeam Updater checks for updates every 24 hours. The Veeam Updater will automatically install updates to the Veeam Updater component. Updates to components other than the Veeam Updater must be applied by the user. 2 The update check requires that the Veeam Backup for Microsoft Azure backup appliance have internet access and be able to reach repository.veeam.com as documented in the product user guide. If the Veeam Backup for Microsoft Azure backup appliance does not have internet access, a manual update process is available. Please contact Veeam Support for assistance. After manual updating, the Updater UI will have to be reopened to see the updated version listed. 3 If the Veeam Updater UI is opened before it has updated automatically, clicking "Update" will cause the Veeam Updater UI to download the update and become inaccessible until reopened. After reopening the Veeam Updater, the new version number will be displayed.
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