CVE-2022-40646 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 initialization of a pointer prior to accessing it. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-17541.
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Analysis
by VulDB Data Team • 10/18/2022
The vulnerability identified as CVE-2022-40646 represents a critical remote code execution flaw in Ansys SpaceClaim 2022 R1, a widely used 3D CAD software for engineering and design applications. This vulnerability falls under the category of improper initialization of variables, specifically manifesting as a null pointer dereference during the parsing of X_B files which are proprietary binary formats used by the software for storing 3D models and design data. The flaw exists within the software's file processing pipeline where the application fails to properly validate or initialize memory pointers before attempting to access them, creating a dangerous condition that can be exploited by malicious actors.
The technical nature of this vulnerability stems from a classic software development error where a pointer variable is used without proper initialization, leading to undefined behavior when the application attempts to dereference the uninitialized pointer. This type of flaw is categorized as CWE-476, which specifically addresses NULL pointer dereference conditions that can result in application crashes or more seriously, arbitrary code execution. The vulnerability requires user interaction to be exploited, meaning that an attacker must convince a target to visit a malicious webpage or open a specially crafted malicious file containing the vulnerable X_B format data. This user interaction requirement reduces the attack surface but does not eliminate the severity of the potential compromise.
From an operational perspective, the impact of this vulnerability extends beyond simple software corruption or application crashes. When successfully exploited, the vulnerability allows remote attackers to execute arbitrary code with the privileges and permissions of the currently running SpaceClaim process, which typically operates with the same privileges as the user who launched the application. This means that if an unsuspecting engineer or designer opens a malicious file, the attacker could potentially gain full control over the victim's system, including the ability to install malware, steal sensitive design data, or perform lateral movement within corporate networks where such engineering software is commonly deployed. The vulnerability's presence in a widely-used engineering tool like SpaceClaim creates significant risk for organizations handling proprietary design data, intellectual property, and sensitive engineering projects.
The exploitation of this vulnerability aligns with techniques described in the MITRE ATT&CK framework under the T1059.007 sub-technique for Windows Scripting, where adversaries leverage legitimate system tools and applications to execute malicious code. Organizations should implement comprehensive mitigation strategies including user education about phishing threats and suspicious file attachments, network-based restrictions on file downloads from untrusted sources, and application whitelisting policies that prevent unauthorized software from running. Additionally, regular software updates and patches from Ansys should be implemented immediately upon availability, as this vulnerability was tracked as ZDI-CAN-17541 by the Zero Day Initiative, indicating it was recognized and documented by cybersecurity researchers. System administrators should also consider network segmentation and monitoring for unusual file access patterns that might indicate exploitation attempts, particularly around engineering and design workstations where such software is typically deployed.