CVE-2025-23082 in Backup for Microsoft Azure
Summary
by MITRE • 01/14/2025
Veeam Backup for Microsoft Azure is vulnerable to Server-Side Request Forgery (SSRF). This may allow an unauthenticated attacker to send unauthorized requests from the system, potentially leading to network enumeration or facilitating other attacks.
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Analysis
by VulDB Data Team • 07/03/2025
The vulnerability identified as CVE-2025-23082 affects Veeam Backup for Microsoft Azure, a widely deployed backup solution for cloud environments. This critical security flaw manifests as a Server-Side Request Forgery vulnerability that enables unauthorized attackers to manipulate the application's behavior by forcing it to make unintended requests to internal or external systems. The vulnerability exists within the backup platform's handling of user-supplied input that is processed server-side, creating a pathway for malicious actors to bypass normal access controls and potentially gain unauthorized access to internal network resources.
The technical implementation of this SSRF vulnerability stems from insufficient validation of input parameters within the Veeam Backup for Microsoft Azure service. Attackers can craft malicious requests that exploit the application's ability to process and forward requests to arbitrary destinations, typically through parameters that control endpoint URLs or service addresses. This flaw falls under the Common Weakness Enumeration category CWE-918, which specifically addresses server-side request forgery vulnerabilities. The vulnerability allows attackers to perform network enumeration by probing internal systems that would normally be protected by network segmentation, potentially revealing sensitive infrastructure details such as internal IP addresses, running services, and system configurations.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can serve as a foundational attack vector for more sophisticated exploitation techniques. An unauthenticated attacker could leverage the SSRF capability to perform internal port scanning, attempt to access internal services that are not exposed to the public internet, or even facilitate further attacks such as credential harvesting from internal systems. The vulnerability's potential for network reconnaissance makes it particularly dangerous in environments where Veeam Backup for Microsoft Azure is deployed, as it could enable attackers to map internal network topologies and identify high-value targets for subsequent exploitation phases. This aligns with the ATT&CK framework's reconnaissance and initial access tactics, specifically covering techniques such as network service scanning and exploitation of remote services.
Organizations utilizing Veeam Backup for Microsoft Azure must implement immediate mitigations to address this vulnerability. The primary defense involves implementing strict input validation and sanitization mechanisms that prevent user-supplied data from being processed as URLs or endpoint specifications. Network-level controls such as firewalls and access control lists should be configured to restrict outbound connections from the backup server to prevent unauthorized external communication. Additionally, implementing web application firewalls and monitoring for suspicious request patterns can help detect and prevent exploitation attempts. The vulnerability represents a significant risk to cloud backup environments and requires prompt remediation through official vendor patches, along with comprehensive network segmentation and monitoring controls to prevent unauthorized access to internal systems.