CVE-2020-36378 in AAPTJS
Summary
by MITRE • 11/01/2021
An issue was discovered in the packageCmd function in shenzhim aaptjs 1.3.1, allows attackers to execute arbitrary code via the filePath parameters.
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Analysis
by VulDB Data Team • 11/04/2021
The vulnerability identified as CVE-2020-36378 resides within the shenzhim aaptjs library version 1.3.1, specifically within the packageCmd function that handles file path parameters. This represents a critical security flaw that enables remote code execution through improper input validation and sanitization. The affected component processes user-supplied file paths without adequate verification, creating an avenue for malicious actors to inject and execute arbitrary code on systems running vulnerable versions of this library.
The technical implementation of this vulnerability stems from insufficient parameter validation within the packageCmd function where the filePath parameter is directly processed without proper sanitization or input filtering. This design flaw aligns with CWE-77 and CWE-94 categories, representing command injection vulnerabilities that allow attackers to execute arbitrary commands through manipulated input parameters. The vulnerability manifests when the application fails to properly validate or escape file path inputs, enabling attackers to craft malicious file paths that bypass normal execution boundaries and execute unintended code sequences.
Operationally, this vulnerability poses significant risks to systems that utilize the shenzhim aaptjs library for Android application packaging or manipulation tasks. Attackers can exploit this flaw to execute malicious code with the privileges of the affected application, potentially leading to full system compromise, data exfiltration, or lateral movement within network environments. The impact extends beyond simple code execution as the vulnerability can be leveraged to establish persistent backdoors, escalate privileges, or deploy additional malicious payloads. Systems that process user-uploaded files or external inputs through this library are particularly vulnerable, making it a prime target for automated exploitation campaigns.
Organizations should prioritize immediate remediation by upgrading to patched versions of the shenzhim aaptjs library or implementing comprehensive input validation measures. The mitigation strategy should include strict parameter validation, input sanitization, and the implementation of secure coding practices that prevent command injection vulnerabilities. Security controls should be enhanced through network segmentation, application whitelisting, and monitoring for suspicious file path patterns. Additionally, the vulnerability highlights the importance of proper dependency management and regular security assessments of third-party libraries. From an att&ck framework perspective, this vulnerability maps to techniques involving command and scripting interpreter execution, privilege escalation, and persistence mechanisms, making it a critical concern for enterprise security teams implementing comprehensive threat detection and response protocols.