CVE-2022-40644 in SpaceClaim
Summary
by MITRE • 09/15/2022
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Ansys SpaceClaim 2022 R1. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of X_B files. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated data structure. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-17408.
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Analysis
by VulDB Data Team • 10/18/2022
The vulnerability identified as CVE-2022-40644 represents a critical remote code execution flaw in Ansys SpaceClaim 2022 R1, a widely used 3D CAD software for engineering design and simulation. This vulnerability falls under the category of buffer overflow conditions that occur during the parsing of X_B files, which are proprietary file formats used within the SpaceClaim environment for storing geometric data and design information. The flaw specifically manifests when the application processes maliciously crafted X_B files, creating a scenario where an attacker can manipulate the software's memory management routines through improper input validation.
The technical implementation of this vulnerability stems from insufficient bounds checking during file parsing operations, which directly maps to CWE-129 Input Validation and CWE-787 Out-of-bounds Write. When SpaceClaim attempts to parse a malformed X_B file, the application fails to properly validate the size and structure of user-supplied data, leading to memory corruption that can be exploited to overwrite adjacent memory locations. This particular flaw is classified as a write past the end of an allocated data structure, where the application writes data beyond the boundaries of a pre-allocated memory buffer, potentially overwriting critical program structures or executable code.
The operational impact of this vulnerability extends beyond simple code execution, as it allows attackers to operate within the security context of the currently running process, which typically runs with the privileges of the user who initiated the application. This means that successful exploitation could result in complete system compromise, especially if the affected user has administrative privileges. The vulnerability's requirement for user interaction through visiting malicious web pages or opening malicious files aligns with ATT&CK technique T1203 Exploitation for Client Execution, making it particularly dangerous in phishing campaigns or targeted attacks against engineering teams who frequently work with CAD files. The attack vector through web-based delivery indicates that this vulnerability could be exploited in zero-day scenarios, as users might not be aware of the malicious nature of the content they encounter.
Mitigation strategies for CVE-2022-40644 should focus on both immediate defensive measures and long-term architectural improvements. Organizations should implement strict file validation protocols, including sandboxing mechanisms that isolate file parsing operations from the main application process, and employ automated threat intelligence systems that can detect and block malicious X_B files. The recommended approach includes deploying application whitelisting solutions that restrict execution of unauthorized files, implementing network-based firewalls that monitor for suspicious file transfer patterns, and establishing secure coding practices that emphasize proper bounds checking and input validation. Additionally, regular security updates and patches should be prioritized, as the vulnerability affects a specific software version that likely has remediation available through vendor security advisories, with the ZDI-CAN-17408 reference indicating that this vulnerability was recognized and documented by the Zero Day Initiative security research group, emphasizing the importance of staying current with vendor security patches and maintaining comprehensive vulnerability management programs.