CVE-2021-43273 : Security Advisory and Response

An Out-of-bounds Read vulnerability exists in the DGN file reading procedure in Open Design Alliance Drawings SDK before 2022. Crafted data in a DGN file and lack of verification of input data can trigger a read past the end of an allocated buffer, allowing an attacker to execute code in the context of the current process.

Understanding CVE-2021-43273

What is CVE-2021-43273?

This CVE identifies an Out-of-bounds Read vulnerability in Open Design Alliance Drawings SDK that can be exploited by malicious actors to execute arbitrary code.

The Impact of CVE-2021-43273

The vulnerability could lead to unauthorized code execution within the affected process, potentially allowing attackers to compromise the system and steal sensitive information.

Technical Details of CVE-2021-43273

Vulnerability Description

The flaw exists in the DGN file reading procedure of Open Design Alliance Drawings SDK, caused by unverified input data, enabling an attacker to read beyond allocated buffer boundaries.

Affected Systems and Versions

Product: Open Design Alliance Drawings SDK
Versions affected: Before 2022.11

Exploitation Mechanism

By crafting malicious data within a DGN file and exploiting the lack of input data verification, an attacker can trigger the vulnerability to read past the allocated buffer, potentially leading to code execution.

Mitigation and Prevention

Immediate Steps to Take

Implement the official patch or update provided by Open Design Alliance to fix the vulnerability.
Consider restricting access to files processed by the affected software.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Regularly update and patch all software and libraries to prevent known vulnerabilities.
Conduct security audits and code reviews to identify and address potential security issues proactively.

Patching and Updates

Apply patches and updates released by Open Design Alliance promptly to mitigate the risk of exploitation.