CVE-2024-29992 in Azure Identity Library for .NET
Summary
by MITRE • 04/09/2024
Azure Identity Library for .NET Information Disclosure Vulnerability
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Analysis
by VulDB Data Team • 01/09/2025
The Azure Identity Library for .NET contains an information disclosure vulnerability that allows unauthorized access to sensitive authentication tokens and credentials stored within the application's memory space. This flaw affects applications that utilize the Azure Identity library for managing authentication flows with Azure services, potentially exposing confidential data to malicious actors who gain access to the application process. The vulnerability stems from improper handling of credential objects and their serialization within memory structures, creating opportunities for information leakage through memory inspection techniques.
This security weakness specifically manifests when the library stores authentication tokens in memory without adequate protection mechanisms, allowing attackers to extract sensitive information through various memory forensic techniques. The flaw exists in the credential management components of the Azure Identity library, where token objects may be inadvertently exposed through debugging interfaces, memory dumps, or process inspection utilities. The vulnerability is particularly concerning because it affects the core authentication functionality that applications depend upon for secure access to Azure resources, potentially enabling attackers to escalate privileges or gain unauthorized access to cloud services.
The operational impact of this information disclosure vulnerability extends beyond simple credential exposure, as compromised authentication tokens can be used to access multiple Azure services and resources without additional authentication requirements. Attackers who successfully exploit this vulnerability can potentially access sensitive data, perform administrative operations, or maintain persistent access to cloud environments. The risk is amplified when applications using the Azure Identity library are deployed in multi-tenant environments or when credential caching mechanisms are enabled, as the compromised tokens may remain valid for extended periods. This vulnerability aligns with CWE-200, which addresses information exposure through improper handling of sensitive data, and represents a significant concern for organizations relying on Azure cloud services for their infrastructure.
Organizations should implement immediate mitigations including updating to the latest version of the Azure Identity library where the vulnerability has been patched, implementing additional credential protection mechanisms such as memory encryption, and establishing monitoring for suspicious credential access patterns. Security teams should also review application configurations to minimize credential caching and implement proper access controls on memory space inspection capabilities. The ATT&CK framework categorizes this vulnerability under T1552, which covers "Unsecured Credentials," and organizations should consider implementing defensive measures such as process memory protection, credential hardening, and regular security assessments of authentication components. Additional mitigations include implementing network segmentation to limit access to applications using the vulnerable library, establishing strict access controls on development and production environments, and conducting regular penetration testing to identify potential exploitation vectors. The vulnerability demonstrates the critical importance of proper credential handling in cloud authentication systems and highlights the need for comprehensive security practices throughout the software development lifecycle.