CVE-2022-36788 in libslic3r
Summary
by MITRE • 04/20/2023
A heap-based buffer overflow vulnerability exists in the TriangleMesh clone functionality of Slic3r libslic3r 1.3.0 and Master Commit b1a5500. A specially-crafted STL file can lead to a heap buffer overflow. An attacker can provide a malicious file to trigger this vulnerability.
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Analysis
by VulDB Data Team • 05/14/2023
The heap-based buffer overflow vulnerability identified as CVE-2022-36788 resides within the TriangleMesh clone functionality of Slic3r libslic3r version 1.3.0 and Master Commit b1a5500. This vulnerability represents a critical security flaw that can be exploited through manipulation of input data during the mesh cloning process. The affected software component processes three-dimensional mesh data structures commonly used in 3D printing applications, where TriangleMesh objects represent the geometric surfaces of 3D models. The vulnerability specifically manifests when the software attempts to duplicate or clone mesh data structures, creating a scenario where insufficient bounds checking occurs during memory allocation and data copying operations.
The technical implementation of this flaw involves improper handling of memory allocation during the cloning process of TriangleMesh objects. When processing maliciously crafted STL files, the software fails to validate the size and structure of incoming mesh data before attempting to duplicate it in memory. This oversight creates a condition where the program attempts to write data beyond the allocated heap buffer boundaries, leading to memory corruption that can result in arbitrary code execution or application crash. The vulnerability is classified as a heap-based buffer overflow, which falls under CWE-121 heap-based buffer overflow, and represents a fundamental flaw in memory management practices within the software's data processing pipeline. The specific trigger occurs when the software encounters malformed mesh data that exceeds expected buffer sizes during the clone operation.
The operational impact of this vulnerability extends significantly within 3D printing environments where Slic3r is commonly deployed for slicing 3D models into printable layers. Attackers can exploit this weakness by crafting specially designed STL files that, when processed through the vulnerable software, will cause the heap buffer overflow. This exploitation scenario aligns with ATT&CK technique T1203, where adversaries manipulate software to execute malicious code, and T1059, which involves the use of command and scripting interpreters. The vulnerability creates a persistent threat vector for unauthorized users who can potentially gain control over systems running vulnerable versions of Slic3r. The consequences include potential system compromise, data corruption, and denial of service conditions that could disrupt 3D printing workflows in both personal and industrial settings.
Mitigation strategies for CVE-2022-36788 should prioritize immediate software updates to versions that address the heap buffer overflow vulnerability. Organizations should implement defensive programming practices including input validation and bounds checking mechanisms to prevent similar issues in future deployments. The implementation of memory safety features such as stack canaries, address space layout randomization, and heap metadata protection can provide additional layers of defense. System administrators should monitor for unauthorized STL file processing and implement access controls to limit exposure to potentially malicious input files. The vulnerability also underscores the importance of regular security assessments and vulnerability scanning of 3D printing software ecosystems, particularly given the increasing integration of such tools in manufacturing environments where supply chain security becomes paramount. Organizations should also consider implementing network segmentation and intrusion detection systems to monitor for exploitation attempts targeting these specific software components.