CVE-2023-42581 in Galaxy Store
Summary
by MITRE • 12/05/2023
Improper URL validation from InstantPlay deeplink in Galaxy Store prior to version 4.5.64.4 allows attackers to execute JavaScript API to access data.
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Analysis
by VulDB Data Team • 08/28/2024
The vulnerability identified as CVE-2023-42581 represents a critical security flaw in the Galaxy Store application ecosystem affecting versions prior to 4.5.64.4. This issue stems from inadequate input validation mechanisms within the InstantPlay deeplink functionality that processes external URLs. The vulnerability creates a pathway for malicious actors to exploit the application's trust model and execute unauthorized JavaScript commands through carefully crafted deep links. The flaw specifically manifests when the application fails to properly sanitize or validate URLs received through the InstantPlay mechanism, allowing arbitrary code execution within the application context. This represents a significant bypass of the application's security boundaries and could potentially enable attackers to access sensitive user data or perform unauthorized operations.
The technical implementation of this vulnerability falls under the category of improper input validation as classified by CWE-20, which specifically addresses weaknesses in the validation of input data. The flaw operates through a classic command injection pattern where external URLs are processed without adequate sanitization, creating an environment where attackers can inject malicious JavaScript payloads. The InstantPlay deeplink functionality appears to trust incoming URL parameters without sufficient verification, allowing attackers to manipulate the URL structure to include JavaScript execution commands. This vulnerability aligns with ATT&CK technique T1059.007 for JavaScript execution and T1203 for exploitation for execution, demonstrating how improper URL handling can create attack vectors for privilege escalation and data access.
The operational impact of CVE-2023-42581 extends beyond simple code execution to encompass potential data breaches and unauthorized access to user information. Attackers leveraging this vulnerability could potentially access personal data, application credentials, or other sensitive information stored within the Galaxy Store environment. The attack surface is particularly concerning as it operates at the application level where users trust the official store to provide secure access to applications. The vulnerability could enable attackers to perform actions such as accessing user account information, manipulating application installations, or even redirecting users to malicious websites through the compromised deeplink mechanism. This creates a persistent threat vector that could affect thousands of users depending on the scale of the affected Galaxy Store installations.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term architectural improvements. The primary fix involves implementing comprehensive URL validation and sanitization mechanisms within the InstantPlay deeplink processing pipeline, ensuring that all external URLs are properly validated before execution. Organizations should implement strict input filtering that removes or encodes potentially dangerous characters and patterns from incoming URLs. Additionally, the application should employ proper context-aware encoding when processing URLs to prevent JavaScript injection attacks. Security controls should include implementing content security policies that restrict script execution within the application context and establishing proper sandboxing mechanisms for external URL processing. Regular security assessments and input validation testing should be conducted to prevent similar vulnerabilities from emerging in future releases. The fix should also include logging and monitoring capabilities to detect suspicious URL patterns and potential exploitation attempts.