CVE-2022-26504 in Backup and Replication
Summary
by MITRE • 03/18/2022
Improper authentication in Veeam Backup & Replication 9.5U3, 9.5U4,10.x and 11.x component used for Microsoft System Center Virtual Machine Manager (SCVMM) allows attackers execute arbitrary code via Veeam.Backup.PSManager.exe
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 03/20/2022
The vulnerability CVE-2022-26504 represents a critical authentication flaw within Veeam Backup & Replication software versions 9.5U3, 9.5U4, 10.x, and 11.x that specifically affects the integration with Microsoft System Center Virtual Machine Manager. This issue stems from improper authentication mechanisms within the Veeam.Backup.PSManager.exe component, which serves as a crucial bridge between Veeam's backup solution and SCVMM's management capabilities. The flaw allows malicious actors to bypass legitimate authentication processes and execute arbitrary code on systems running vulnerable versions of the software, creating a significant attack surface that could compromise entire virtualized environments.
The technical root cause of this vulnerability lies in the insufficient validation of authentication tokens and credentials within the PowerShell management component that handles communication between Veeam and SCVMM. Attackers can exploit this weakness by crafting malicious requests that appear to originate from legitimate Veeam management processes, thereby gaining unauthorized access to the underlying backup infrastructure. This authentication bypass occurs at the component level where Veeam.Backup.PSManager.exe fails to properly verify the authenticity of incoming requests, particularly those related to PowerShell execution contexts that are typically restricted to authorized administrators. The vulnerability falls under CWE-287, which addresses improper authentication issues, and aligns with ATT&CK technique T1078 for valid accounts and T1059 for command and scripting interpreter, as attackers can leverage this flaw to execute malicious code through PowerShell commands.
The operational impact of CVE-2022-26504 extends far beyond simple unauthorized access, as it provides attackers with the ability to manipulate backup operations and potentially exfiltrate sensitive data from virtualized environments. Organizations relying on Veeam for their backup infrastructure face significant risk of data compromise, system disruption, and potential lateral movement within their network infrastructure. The vulnerability is particularly dangerous because it affects the core backup and recovery functionality that many enterprises depend upon for business continuity, meaning that successful exploitation could result in complete loss of backup data or the ability to restore systems. Additionally, since the flaw exists within the SCVMM integration component, attackers could potentially gain control over virtual machine management functions, leading to complete compromise of the virtualized infrastructure.
Mitigation strategies for this vulnerability require immediate patching of all affected Veeam versions to the latest available releases that contain proper authentication controls. Organizations should also implement network segmentation to restrict access to Veeam management interfaces and PowerShell endpoints, while enabling detailed logging and monitoring of authentication events. Security teams must conduct comprehensive assessments of their Veeam configurations to ensure that unnecessary PowerShell management features are disabled and that access controls are properly enforced. The remediation process should include reviewing and tightening authentication requirements for all Veeam components, particularly those interacting with SCVMM, and implementing multi-factor authentication where possible. Additionally, regular vulnerability scanning and penetration testing should be conducted to identify and remediate similar authentication weaknesses within the broader backup and virtualization infrastructure. Organizations should also consider implementing network access controls that limit communication between Veeam components and external systems, reducing the attack surface available to potential adversaries.