CVE-2022-33881 in AutoCAD 2023
Summary
by MITRE • 07/29/2022
Parsing a maliciously crafted PRT file can force Autodesk AutoCAD 2023 to read beyond allocated boundaries. This vulnerability in conjunction with other vulnerabilities could lead to code execution in the context of the current process.
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Analysis
by VulDB Data Team • 08/28/2022
The vulnerability identified as CVE-2022-33881 represents a critical buffer overflow condition within Autodesk AutoCAD 2023 that arises during the parsing of specially crafted PRT files. This issue falls under the broader category of memory safety vulnerabilities and specifically aligns with CWE-125, which describes out-of-bounds read conditions. The flaw manifests when the application processes PRT files that contain malformed data structures, causing the parsing routine to access memory locations beyond the intended boundaries of allocated buffers. Such behavior creates an exploitable condition that can be leveraged by malicious actors to disrupt normal application operation or potentially execute arbitrary code.
The technical implementation of this vulnerability stems from insufficient input validation mechanisms within AutoCAD's file parsing subsystem. When the application encounters a PRT file with maliciously constructed data elements, the parsing algorithm fails to properly bounds-check memory access operations, leading to unauthorized memory reads. This particular weakness exists in the software's handling of proprietary file format structures that are commonly used for storing drawing and design data. The vulnerability demonstrates characteristics consistent with heap-based buffer overflows and memory corruption issues that have been documented in similar CAD applications.
From an operational perspective, this vulnerability poses significant risks to organizations that rely heavily on AutoCAD for design and engineering work. The potential for remote code execution in the context of the current process means that an attacker could gain unauthorized access to systems running vulnerable versions of AutoCAD. This threat is particularly concerning given that many design firms and engineering organizations use AutoCAD extensively, often with elevated privileges and access to sensitive project data. The vulnerability could be exploited through social engineering attacks where users unknowingly open malicious PRT files, or through direct compromise of shared design repositories.
The exploitation of CVE-2022-33881 aligns with several techniques documented in the MITRE ATT&CK framework, particularly under the T1059 category for command and scripting interpreter and T1203 for exploitation for execution. Attackers could potentially chain this vulnerability with other weaknesses to establish persistent access or escalate privileges within the affected systems. Organizations should consider this vulnerability in their broader threat modeling activities, as it could serve as an initial access vector for more sophisticated attacks targeting design and engineering infrastructure. The vulnerability's impact extends beyond simple denial of service, as it represents a pathway to full system compromise when combined with other exploitation techniques.
Mitigation strategies for CVE-2022-33881 should include immediate application of Autodesk's security patches and updates, along with comprehensive network monitoring for suspicious file access patterns. Organizations should implement strict file validation policies and consider deploying sandboxing solutions for handling untrusted design files. Additionally, regular security assessments of CAD environments and user education programs regarding safe file handling practices are essential components of a comprehensive defense strategy. The vulnerability underscores the importance of maintaining current security postures in specialized software environments where legacy systems may contain unpatched security flaws.