CVE-2025-20980 in libsavscmn
Summary
by MITRE • 05/07/2025
Out-of-bounds write in libsavscmn prior to Android 15 allows local attackers to cause memory corruption.
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Analysis
by VulDB Data Team • 10/03/2025
The vulnerability identified as CVE-2025-20980 represents a critical out-of-bounds write flaw within the libsavscmn library component that affects Android versions prior to Android 15. This issue resides in the system's core libraries responsible for handling various system services and communications, making it particularly dangerous for local attackers who can exploit it to manipulate memory structures. The vulnerability manifests when the library processes certain input data without proper bounds checking, allowing malicious code to write data beyond the allocated memory boundaries. Such memory corruption can lead to unpredictable system behavior and potentially provide attackers with elevated privileges or system compromise capabilities. The affected libsavscmn library serves as a foundational component in Android's system architecture, handling critical communication protocols between various system services and applications.
The technical implementation of this vulnerability stems from inadequate input validation mechanisms within the memory management functions of libsavscmn. When processing specific data sequences or parameters, the library fails to verify that write operations remain within allocated buffer boundaries, creating a classic out-of-bounds write condition that falls under CWE-787. This flaw is particularly concerning because it operates at a low system level where memory corruption can be leveraged to execute arbitrary code or cause system crashes. The vulnerability is classified as a local privilege escalation vector since it requires local system access but can potentially be exploited to gain elevated privileges within the Android operating system. Attackers can craft malicious input that triggers the out-of-bounds write condition, leading to memory corruption that may allow them to overwrite critical system structures or execute code with higher privileges than originally intended.
The operational impact of CVE-2025-20980 extends beyond simple system instability, as it creates a potential pathway for persistent system compromise and data exfiltration. Local attackers who can execute code on an affected Android device can leverage this vulnerability to escalate their privileges and gain access to sensitive system resources that should normally be restricted. The memory corruption resulting from the out-of-bounds write can be exploited through techniques such as return-oriented programming or function pointer overwrites to achieve code execution in privileged contexts. This vulnerability also aligns with ATT&CK technique T1068 which covers 'Exploitation for Privilege Escalation' and can be combined with other techniques to establish persistent access. The affected system components are integral to Android's communication stack, making this vulnerability particularly dangerous for attackers seeking to establish footholds within mobile environments where traditional network-based attacks may be more difficult to execute.
Mitigation strategies for CVE-2025-20980 should prioritize immediate system updates to Android 15 or later versions where the vulnerability has been patched. Organizations should implement comprehensive monitoring of system logs for signs of memory corruption or unexpected behavior that might indicate exploitation attempts. Security teams should also consider deploying runtime application protection mechanisms and memory safety checks to detect and prevent out-of-bounds write operations. The vulnerability requires careful attention in mobile device management programs where legacy Android versions may still be in use, as these systems represent high-value targets for attackers seeking to exploit known vulnerabilities. Regular security assessments of system libraries and components should include specific checks for bounds checking vulnerabilities, particularly in core system libraries that handle communication and privilege management functions. Additionally, implementing network segmentation and access controls can limit the potential impact of successful exploitation attempts by reducing the attack surface available to local attackers who might otherwise leverage this vulnerability to gain broader system access.