CVE-2024-43767 in Android
Summary
by MITRE • 01/03/2025
In prepare_to_draw_into_mask of SkBlurMaskFilterImpl.cpp, there is a possible heap overflow due to improper input validation. This could lead to remote code execution with no additional execution privileges needed. User interaction is not needed for exploitation.
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Analysis
by VulDB Data Team • 01/04/2025
The vulnerability identified as CVE-2024-43767 resides within the SkBlurMaskFilterImpl.cpp component of a graphics rendering library, specifically in the prepare_to_draw_into_mask function. This flaw represents a heap buffer overflow condition that arises from inadequate validation of input parameters during the processing of graphical mask operations. The issue manifests when the system attempts to allocate memory for blur effects applied to graphical elements, where malformed or excessively large input values can cause the application to write beyond the bounds of allocated heap memory regions.
The technical implementation of this vulnerability stems from insufficient boundary checking mechanisms within the memory allocation logic. When processing graphical blur operations, the system calculates required buffer sizes based on input parameters without proper validation of these values against maximum allowable limits. This allows an attacker to craft malicious input that triggers an excessive memory allocation request, ultimately resulting in a heap overflow condition. The flaw operates at the intersection of memory safety and graphics processing, where the graphics rendering pipeline fails to enforce proper input sanitization before memory operations.
The operational impact of CVE-2024-43767 is particularly severe as it enables remote code execution without requiring any user interaction or additional privileges. This characteristic places the vulnerability in the category of critical threats that can be exploited through network-based attacks targeting applications utilizing the affected graphics library. The lack of user interaction requirements means that exploitation can occur automatically when the vulnerable system processes malicious graphical content, potentially affecting web browsers, graphic design applications, or any software that employs the affected rendering components. The vulnerability's remote exploitability significantly broadens its attack surface and potential for widespread impact.
From a security framework perspective, this vulnerability maps to CWE-121, heap-based buffer overflow, and aligns with ATT&CK technique T1059.007 for command and scripting interpreter. The exploitation process typically involves crafting specific graphical input that triggers the memory corruption, which can then be leveraged to execute arbitrary code within the context of the affected application. The vulnerability's classification as a remote code execution threat places it among the most critical categories of security flaws, as it can be exploited without user involvement and potentially allows attackers to gain full control over affected systems.
Mitigation strategies for CVE-2024-43767 should prioritize immediate patching of affected systems with the vendor-provided security updates. Organizations should implement network segmentation and monitoring to detect potential exploitation attempts targeting the affected graphics rendering components. Input validation controls should be enhanced at multiple layers including application-level sanitization and runtime bounds checking. Additionally, security teams should consider implementing sandboxing mechanisms for graphics processing operations and regularly audit third-party libraries for similar vulnerabilities. The remediation approach must address both the immediate patching requirements and long-term architectural improvements to prevent similar memory safety issues in other components of the graphics processing pipeline.