CVE-2024-29007 in CloudStack
Summary
by MITRE • 04/04/2024
The CloudStack management server and secondary storage VM could be tricked into making requests to restricted or random resources by means of following 301 HTTP redirects presented by external servers when downloading templates or ISOs. Users are recommended to upgrade to version 4.18.1.1 or 4.19.0.1, which fixes this issue.
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Analysis
by VulDB Data Team • 11/12/2024
The vulnerability identified as CVE-2024-29007 represents a significant security flaw in Apache CloudStack management infrastructure that could enable unauthorized access to internal resources through improper handling of HTTP redirects. This issue affects both the CloudStack management server and secondary storage virtual machines, creating potential attack vectors that could be exploited by malicious actors to gain access to restricted network resources or sensitive data. The flaw specifically manifests when the system processes HTTP redirects during template or ISO download operations, allowing external servers to influence the destination of these requests through 301 redirect responses. This behavior violates fundamental security principles of access control and resource isolation that are critical for cloud infrastructure protection.
The technical implementation of this vulnerability stems from inadequate validation of HTTP redirect responses within the CloudStack download mechanisms. When the management server or secondary storage VM attempts to fetch templates or ISO files from external sources, the system follows HTTP 301 redirects without proper sanitization or destination verification. This allows attackers who control external servers to manipulate the redirect chain to point to internal resources that should normally be inaccessible from the external network. The flaw essentially enables a form of server-side request forgery where the CloudStack infrastructure becomes an unwitting proxy for accessing restricted internal services. This vulnerability aligns with CWE-611 (Improper Restriction of XML External Entity Reference) and CWE-20 (Improper Input Validation) classifications, as it involves improper handling of external inputs and insufficient validation of redirect destinations.
The operational impact of CVE-2024-29007 extends beyond simple information disclosure, potentially enabling attackers to perform reconnaissance on internal network segments, access sensitive configuration data, or even execute further attacks against internal services. The vulnerability could be particularly dangerous in multi-tenant cloud environments where isolation between different customer deployments is paramount. Attackers could leverage this flaw to map internal network topologies, identify running services, or access resources that should only be reachable through authorized channels. The secondary storage VM component adds additional risk since it typically operates with elevated privileges and may have access to customer data or system configuration information. This vulnerability directly relates to ATT&CK technique T1566 (Phishing for Information) and T1071.001 (Application Layer Protocol: Web Protocols) as it exploits HTTP protocol handling to gain unauthorized access to internal resources.
Organizations using affected CloudStack versions face substantial risk of unauthorized access to their cloud infrastructure, particularly when downloading templates or ISO files from untrusted sources. The recommended mitigation involves upgrading to CloudStack versions 4.18.1.1 or 4.19.0.1, which implement proper validation of HTTP redirect responses and prevent following redirects to internal resources. Security administrators should also consider implementing network segmentation controls, firewall rules to restrict outbound HTTP requests, and monitoring for unusual patterns in template download operations. Additional protective measures include configuring the management server to validate redirect destinations against a known whitelist of trusted domains and implementing proper logging of all external resource access attempts. The fix addresses the root cause by ensuring that HTTP redirects are validated before being processed, preventing the exploitation of this vulnerability while maintaining the legitimate functionality of template and ISO downloads from trusted sources.