CVE-2021-25383 in Smart Phone
Summary
by MITRE • 06/11/2021
An improper input validation vulnerability in scmn_mfal_read() in libsapeextractor library prior to SMR MAY-2021 Release 1 allows attackers to execute arbitrary code on mediaextractor process.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 06/14/2021
The vulnerability identified as CVE-2021-25383 represents a critical improper input validation flaw within the libsapeextractor library, specifically affecting the scmn_mfal_read() function. This vulnerability exists in versions prior to the SMR MAY-2021 Release 1 and creates a significant security risk by allowing remote attackers to execute arbitrary code on the mediaextractor process. The issue stems from inadequate validation of user-supplied input parameters that are processed by the vulnerable function, creating a potential attack vector for privilege escalation and system compromise.
The technical nature of this vulnerability aligns with CWE-20, which describes improper input validation as a fundamental weakness in software security. When the scmn_mfal_read() function processes input data, it fails to properly validate or sanitize the incoming parameters, allowing maliciously crafted input to bypass normal execution paths. This flaw operates at the boundary between user input and system processing, where untrusted data flows directly into critical system functions without adequate security checks. The vulnerability is particularly dangerous because it enables attackers to inject and execute arbitrary code within the context of the mediaextractor process, potentially leading to complete system compromise.
From an operational impact perspective, this vulnerability exposes systems to remote code execution attacks that could be leveraged by threat actors to gain unauthorized access to sensitive data and system resources. The mediaextractor process typically handles multimedia content processing, making it a valuable target for attackers seeking to exploit system weaknesses. The vulnerability's remote exploitability means that attackers do not require local system access to leverage the flaw, significantly expanding the potential attack surface. Organizations using affected versions of the libsapeextractor library face substantial risk of data breaches, system infiltration, and potential lateral movement within their networks.
The attack surface for this vulnerability extends across various system components that rely on the affected library for multimedia processing tasks. Security professionals should consider this weakness in the context of the MITRE ATT&CK framework, particularly under the T1059.007 technique for command and scripting interpreter, as the arbitrary code execution capability could enable attackers to deploy additional malicious payloads or establish persistent access. Mitigation strategies should include immediate patching to the SMR MAY-2021 Release 1 or later versions that contain the necessary input validation fixes. Additionally, network segmentation, input sanitization measures, and monitoring for anomalous process execution patterns can help reduce the risk of exploitation while awaiting full patch deployment.