Platform
windows
Component
azure-health-bot
CVE-2024-38109 describes a Server-Side Request Forgery (SSRF) vulnerability discovered in Microsoft Azure Health Bot. This vulnerability allows an authenticated attacker to potentially gain elevated privileges and access internal network resources. The vulnerability affects versions of Azure Health Bot prior to a currently undisclosed fixed version. Microsoft has advised users to implement mitigation strategies.
The SSRF vulnerability in Azure Health Bot poses a significant risk because it allows an authenticated attacker to craft malicious requests that appear to originate from the Health Bot service itself. This can be leveraged to access internal services and resources that are normally protected from external access. An attacker could potentially read sensitive data, modify configurations, or even execute commands on other systems within the network. The impact is amplified by the potential for lateral movement, allowing an attacker to compromise other systems after initially exploiting the Health Bot. The blast radius extends to any internal resource accessible via HTTP/HTTPS from the Health Bot’s network context.
CVE-2024-38109 was publicly disclosed on August 13, 2024. Its severity is rated as CRITICAL (CVSS 9.1). No public proof-of-concept exploits are currently known, but the SSRF nature of the vulnerability makes it likely that exploits will emerge. The vulnerability is not currently listed on the CISA KEV catalog. Given the ease of SSRF exploitation and the potential for significant impact, organizations should prioritize mitigation.
Exploit Status
EPSS
3.94% (88% percentile)
CISA SSVC
CVSS Vector
Due to the lack of a specified fixed version, immediate mitigation focuses on network segmentation and access control. Implement strict network policies to limit the Health Bot's outbound network access to only essential services. Utilize a Web Application Firewall (WAF) or proxy to filter outbound requests and block suspicious URLs or patterns indicative of SSRF attempts. Regularly review and audit the Health Bot's configuration to ensure adherence to security best practices. Consider implementing a service mesh to enforce fine-grained access control policies. After implementing these mitigations, verify functionality by attempting to access internal resources through the Health Bot and confirming that access is denied.
Microsoft recommends applying the security updates provided for Azure Health Bot. See the Microsoft security advisory for more details and specific instructions on how to mitigate this vulnerability. Ensure you review and apply the recommended security configurations for your Azure Health Bot instance.
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CVE-2024-38109 is a critical Server-Side Request Forgery (SSRF) vulnerability in Microsoft Azure Health Bot, allowing authenticated attackers to potentially elevate privileges and access internal network resources.
If you are using Azure Health Bot and have not upgraded to a fixed version (currently undisclosed), you are potentially affected by this vulnerability. Prioritize mitigation until a patch is available.
Microsoft has not yet released a fixed version. Implement network segmentation, WAF rules, and access control policies as immediate mitigations. Monitor for updates from Microsoft.
While no public exploits are currently known, the SSRF nature of the vulnerability suggests potential for exploitation. Organizations should proactively implement mitigations.
Refer to the Microsoft Security Update Guide for the latest information and official advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-38109
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