CVE-2024-42452 in Backup & Replication
Summary
by MITRE • 12/04/2024
A vulnerability in Veeam Backup & Replication allows a low-privileged user to start an agent remotely in server mode and obtain credentials, effectively escalating privileges to system-level access. This allows the attacker to upload files to the server with elevated privileges. The vulnerability exists because remote calls bypass permission checks, leading to full system compromise.
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Analysis
by VulDB Data Team • 12/06/2024
The vulnerability identified as CVE-2024-42452 resides within Veeam Backup & Replication software, a widely deployed solution for data protection and disaster recovery in enterprise environments. This critical flaw represents a privilege escalation vulnerability that fundamentally undermines the security model of the backup platform. The vulnerability manifests when a low-privileged user can initiate remote agent operations in server mode, effectively bypassing the intended access controls that should prevent such actions. The flaw directly violates the principle of least privilege and demonstrates a critical failure in the permission validation mechanisms that protect system integrity. Organizations relying on Veeam for their backup infrastructure face significant risk as this vulnerability can be exploited by adversaries with minimal initial access to achieve complete system compromise.
The technical implementation of this vulnerability stems from inadequate validation of remote procedure calls within the Veeam architecture. Specifically, the system fails to properly enforce authorization checks when processing remote agent activation requests, allowing unauthorized users to invoke server-side operations that should only be accessible to administrators or privileged system accounts. This represents a classic example of insecure direct object reference vulnerability as described in CWE-284, where the application fails to validate access permissions before executing operations that could result in system-level access. The flaw enables attackers to leverage legitimate system components to escalate their privileges, creating a path to full system compromise that bypasses traditional security controls. The remote execution capability further amplifies the impact as attackers can exploit this vulnerability from external networks without requiring physical access to the system.
The operational impact of CVE-2024-42452 extends far beyond simple privilege escalation, as it provides attackers with complete control over backup servers and potentially the entire enterprise infrastructure they protect. Once an attacker achieves system-level access through this vulnerability, they can upload malicious files, modify backup configurations, and potentially exfiltrate sensitive data from backup repositories. This creates a particularly dangerous scenario where attackers can manipulate backup systems to hide their activities or create persistent backdoors within the organization's data protection infrastructure. The vulnerability also enables attackers to potentially corrupt backup data, rendering critical recovery operations ineffective and creating additional business disruption. According to ATT&CK framework, this vulnerability maps to privilege escalation techniques and can be leveraged for lateral movement within the network, as backup servers often have access to multiple systems and data sources.
Organizations must implement immediate mitigations to address this vulnerability, beginning with applying the latest security patches provided by Veeam. Until patches are deployed, network segmentation should be implemented to isolate Veeam servers from untrusted networks, and strict access controls should be enforced to limit who can initiate remote agent operations. Monitoring for unauthorized remote agent activation attempts should be enabled and reviewed regularly, as these activities may indicate exploitation attempts. The vulnerability also highlights the importance of principle of least privilege enforcement, where only necessary users should have access to initiate backup agent operations. Security teams should conduct thorough audits of Veeam configurations and permissions to identify any additional access vectors that could be exploited. Additionally, implementing network-based intrusion detection systems that can identify anomalous remote procedure calls and agent activation patterns will provide early warning capabilities. Organizations should also consider implementing backup-specific security measures such as encryption of backup data and integrity verification mechanisms to protect against data tampering. The vulnerability underscores the critical need for regular security assessments of backup infrastructure and demonstrates how backup systems, when compromised, can become a primary attack vector for broader network infiltration.