CVE-2025-29972 in Azure Storage Resource Provider
Summary
by MITRE • 05/09/2025
Server-side request forgery (ssrf) in Azure Storage Resource Provider allows an authorized attacker to perform spoofing over a network.
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Analysis
by VulDB Data Team • 02/14/2026
The vulnerability identified as CVE-2025-29972 represents a critical server-side request forgery flaw within the Azure Storage Resource Provider component of Microsoft's cloud infrastructure. This security weakness specifically affects the server-side processing capabilities of Azure storage services, creating a pathway for malicious actors to manipulate network requests originating from the storage provider's backend systems. The vulnerability exists in the way the Azure Storage Resource Provider handles certain request parameters and network communication flows, potentially allowing an attacker with valid authentication credentials to craft malicious requests that can bypass normal network restrictions and access internal systems or resources that should otherwise be protected.
The technical implementation of this server-side request forgery vulnerability stems from insufficient validation of network request origins and destinations within the Azure Storage Resource Provider's processing logic. When legitimate users or services make requests to Azure storage resources, the provider's backend components may inadvertently accept and process maliciously crafted parameters that redirect network traffic to unauthorized internal endpoints. This flaw operates at the application layer where network requests are handled, potentially allowing attackers to exploit the trust relationships between Azure components and internal network services. The vulnerability is particularly concerning because it leverages legitimate authentication mechanisms, making it difficult to distinguish between authorized and malicious requests at the network level. According to CWE classification, this represents a variant of CWE-918 Server-Side Request Forgery, which specifically addresses weaknesses in applications that fail to properly validate and control outbound network requests.
The operational impact of CVE-2025-29972 extends beyond simple data exfiltration, as it can enable attackers to perform reconnaissance activities within the Azure tenant's network infrastructure. Authorized attackers can potentially map internal network topology, access sensitive internal services, or even escalate privileges by leveraging the trust relationships between Azure components. The vulnerability may allow attackers to access other Azure services or resources within the same subscription or tenant, potentially leading to broader compromise of cloud environments. In multi-tenant scenarios, this could enable cross-tenant attacks where an attacker in one tenant might gain access to resources in another tenant's network segment. The attack vector typically requires an authenticated user with appropriate permissions to the Azure Storage Resource Provider, making it particularly dangerous for organizations where privileged accounts are compromised or where insufficient principle of least privilege is implemented.
Mitigation strategies for this vulnerability should focus on implementing robust input validation and network request filtering mechanisms within the Azure Storage Resource Provider. Organizations should immediately review and update their Azure storage access policies to ensure that only necessary network access is granted to storage resource provider components. Network segmentation and firewall rules should be implemented to restrict outbound network requests from storage components to only trusted destinations. Microsoft recommends applying the latest security updates and patches as soon as they become available, while organizations should also implement monitoring solutions that can detect anomalous network request patterns originating from Azure storage resources. The implementation of Azure Network Security Groups and Application Gateway configurations can help filter and control outbound traffic from storage components. Additionally, organizations should consider implementing Azure Policy configurations that enforce secure network request handling and prevent unauthorized redirection of network traffic. From an ATT&CK framework perspective, this vulnerability maps to T1566 Initial Access and T1071.004 Application Layer Protocol, as it enables attackers to establish unauthorized network connections through legitimate application interfaces. Regular security assessments and penetration testing should be conducted to identify and remediate similar vulnerabilities in cloud infrastructure components.