Thursday, November 30, 2023

Veeam Critical Flaws Let Attackers Execute Remote Code and Steal NTLM Hashes

Veeam, a Global Leader in Data Protection, issued hotfixes to address four vulnerabilities affecting the Veeam ONE IT infrastructure monitoring and analytics platform.

Two vulnerabilities are classified as ‘critical,’ while the other two are classified as ‘medium severity’ flaws.

The critical flaws allow remote code execution and steal NTLM Hashes, and the medium-severity issues involve user interaction and have a lesser impact.

Critical Flaws Addressed

A critical vulnerability tracked as CVE-2023-38547 in Veeam ONE with a CVSS base score of 9.9 allows an unauthenticated user to obtain information about the SQL server connection used by Veeam ONE to access its configuration database, an advisory published today stated.

“This may lead to remote code execution on the SQL server hosting the Veeam ONE configuration database,” the company said in its advisory.

CVE-2023-38547 affected Veeam ONE Versions 11, 11a, 12

Because of a flaw in Veeam ONE identified as CVE-2023-38548 with a CVSS base score of 9.8, anyone with access to the Veeam ONE Web Client can get the NTLM hash of the account used by the Veeam ONE Reporting Service.

CVE-2023-38548 Affected Veeam versions ONE 12.

Medium Severity Flaws Addressed

A flaw classified as CVE-2023-38549 with a CVSS base score of 4.5 in Veeam ONE permits a user with the Veeam ONE Power user role to gain the access token of a user with the Veeam ONE Administrator role using XSS.  

“The criticality of this vulnerability is reduced as it requires interaction by a user with the Veeam ONE Administrator role,” the company said.

Affected versions are Veeam ONE 11, 11a, 12.

In Veeam ONE, a vulnerability classified as CVE-2023-41723 and a CVSS base score of 4.3 permits the Dashboard Schedule to be viewed by a user with the Veeam ONE Read-Only User role.

“The criticality of this vulnerability is reduced because the user with the Read-Only role is only able to view the schedule and cannot make changes,” the company said.

Affected versions are Veeam ONE 11, 11a, 12.

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Patches Released

For the following versions, there is a patch available that fixes these vulnerabilities:

  • Veeam ONE 12 P20230314 (
  • Veeam ONE 11a (
  • Veeam ONE 11 (

The hotfix installation instructions provided by Veeam require administrators to stop monitoring and reporting services, replace files, and restart services.

Patch Manager Plus: Patch over 850 third-party applications quickly. Try a free trial to ensure 100% security.


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BALAJI is an Ex-Security Researcher (Threat Research Labs) at Comodo Cybersecurity. Editor-in-Chief & Co-Founder - Cyber Security News & GBHackers On Security.

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