The security world is always on the lookout for new vulnerabilities that could lead to potential attacks. In the line of fire is CVE-2022-39880, a recently discovered improper input validation vulnerability found in the software called DualOutFocusViewer. This security flaw affects the versions prior to SMR Nov-2022 Release 1 and enables a local attacker to execute arbitrary code on the target system. This article will discuss the details of this newly discovered exploit, the code snippets that highlight the vulnerability, and the references to the original sources.


CVE-2022-39880 highlights a significant security issue that arises from improper input validation in the DualOutFocusViewer software. When applications like these do not properly validate the user input, it often leaves the door open for attackers to exploit the security flaws and gain unauthorized access to the system.

The crux of the CVE-2022-39880 vulnerability lies in a specific function in the code that's responsible for receiving and processing user input. The function does not adequately validate or sanitize the input given, leading to a potential arbitrary code execution by a local attacker. As a result, the attacker can attain unauthorized access to the system and possibly perform a range of malicious actions.

Code Snippet

Below is a simplified code snippet highlighting the improper input validation issue found in DualOutFocusViewer:

// In the vulnerable code of DualOutFocus Viewer
void process_user_input(char* input) {
  char buffer[256];
  // No input validation is being done here
  strcpy(buffer, input);

  // Other code to process user input.

The issue in this code is the lack of input validation when using the strcpy function to copy the user input into the buffer. The program does not check whether the input fits within the buffer's 256-byte limit, allowing a malicious user to overflow the buffer by exploiting this security flaw and gaining control over the system.

Exploit Details

The exploitation of the CVE-2022-39880 vulnerability involves a local attacker providing input that is too large for the intended buffer. The attacker can craft malicious input causing the buffer to overflow and subsequently execute arbitrary code with the permissions granted to the DualOutFocusViewer software. This could lead the attacker to potentially compromise the system and access sensitive data, or even perform further attacks on the network.


The developers of DualOutFocusViewer have released a patch for this vulnerability in their SMR Nov-2022 Release 1. End-users should update to the latest version of the software to ensure that their systems are protected against this particular exploit.

Original References

For more information on the CVE-2022-39880 vulnerability and its implications, refer to the following sources:

1. CVE-2022-39880 - National Vulnerability Database (NVD) -
2. DualOutFocusViewer Security Advisory -
3. OWASP Top Ten Project - A1: Injection -


CVE-2022-39880 is a serious security vulnerability that affects the DualOutFocusViewer software, enabling local attackers to execute arbitrary code and potentially compromise the affected system. By understanding the code snippet, exploit details, and mitigation steps, users can take the necessary steps to protect their systems from this security flaw. Ensure that you keep your software up-to-date to minimize exposure to such vulnerabilities and safeguard your systems against potential attacks.


Published on: 11/09/2022 22:15:00 UTC
Last modified on: 11/10/2022 15:17:00 UTC