CVE-2025-36893 in Android
Summary
by MITRE • 09/04/2025
In ReadTachyonCommands of gxp_main_actor.cc, there is a possible information leak due to uninitialized data. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.
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Analysis
by VulDB Data Team • 09/05/2025
The vulnerability identified as CVE-2025-36893 represents a critical information disclosure flaw within the ReadTachyonCommands function of the gxp_main_actor.cc component. This issue stems from the improper handling of uninitialized data structures that may contain residual information from previous operations or memory allocations. The vulnerability exists at the core level of the system's command processing mechanism, specifically within the actor framework that manages asynchronous operations. The uninitialized data exposure occurs during the processing of read tachyon commands, where sensitive information from memory may be inadvertently exposed to unauthorized processes or threads within the same execution context.
The technical implementation of this vulnerability demonstrates a classic case of improper initialization practices that fall under CWE-457, which addresses the use of uninitialized variables. When the ReadTachyonCommands function processes incoming commands, it fails to properly initialize certain data structures or memory regions before utilizing them. This creates a scenario where residual data from previous operations, potentially including sensitive information such as cryptographic keys, session tokens, or system credentials, remains accessible in memory locations that are subsequently processed by the command handler. The flaw is particularly concerning because it operates at the system level where memory management and data integrity are paramount for maintaining security boundaries.
From an operational perspective, this vulnerability presents a significant risk for local information disclosure attacks that require no additional privileges or user interaction to exploit. The attack vector leverages the inherent memory management characteristics of the system to extract sensitive information without the need for complex exploitation techniques or elevated access rights. This makes the vulnerability particularly dangerous as it can be exploited by any process running within the same security context, potentially including malicious code or compromised applications that share the same memory space. The lack of user interaction requirements means that automated exploitation is possible, significantly increasing the attack surface and potential impact of this vulnerability.
The implications of this information leak extend beyond simple data exposure, as the leaked information could potentially be used to facilitate more sophisticated attacks such as privilege escalation, credential harvesting, or system compromise. Attackers could leverage the leaked data to reconstruct session information, extract cryptographic material, or identify system configurations that might be used in subsequent attacks. This vulnerability aligns with several ATT&CK techniques including T1005 (Data from Local System) and T1059 (Command and Scripting Interpreter) where the initial information disclosure serves as a foundation for further exploitation. The vulnerability's impact is amplified by its location within core system components, suggesting that the leaked information could potentially affect multiple subsystems or services that depend on the affected actor framework.
Mitigation strategies for this vulnerability should focus on implementing proper initialization practices throughout the codebase, particularly within the affected function and related memory management operations. The most effective remediation involves ensuring that all data structures are explicitly initialized before use, implementing memory sanitization routines, and conducting thorough code reviews to identify similar patterns throughout the system. Additionally, implementing proper access controls and memory isolation mechanisms can help limit the potential impact of information leaks even when such vulnerabilities exist. Regular security testing including static analysis and dynamic memory inspection should be conducted to identify and remediate similar issues in other components of the system. The remediation approach should also consider implementing automated tools that can detect uninitialized variable usage patterns and flag them during code development and testing phases to prevent similar vulnerabilities from being introduced in future releases.