CVE-2019-5083 : Security Advisory and Response

A critical out-of-bounds write vulnerability exists in the igcore19d.dll TIFdecodethunderscan function of Accusoft ImageGear 19.3.0 library, allowing remote code execution through a specially crafted TIFF file.

Understanding CVE-2019-5083

This CVE involves a severe vulnerability in the Accusoft ImageGear library that can be exploited by malicious actors to execute arbitrary code remotely.

What is CVE-2019-5083?

The vulnerability lies in the TIFdecodethunderscan function of the igcore19d.dll file within the Accusoft ImageGear 19.3.0 library. Attackers can trigger this flaw using a manipulated TIFF file, leading to an out-of-bounds write scenario.

The Impact of CVE-2019-5083

CVSS Base Score: 9.8 (Critical)
Attack Vector: Network
Attack Complexity: Low
Confidentiality Impact: High
Integrity Impact: High
Availability Impact: High
This vulnerability poses a significant risk as it allows attackers to execute code remotely without requiring any user interaction.

Technical Details of CVE-2019-5083

This section delves into the specific technical aspects of the vulnerability.

Vulnerability Description

The flaw in the igcore19d.dll TIFdecodethunderscan function enables attackers to perform an out-of-bounds write, potentially leading to remote code execution.

Affected Systems and Versions

Affected Product: Accusoft
Affected Version: Accusoft ImageGear 19.3.0

Exploitation Mechanism

To exploit this vulnerability, attackers need to provide victims with a corrupted TIFF file, triggering the out-of-bounds write and enabling remote code execution.

Mitigation and Prevention

Protecting systems from CVE-2019-5083 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security patches provided by Accusoft promptly.
Implement network-level controls to filter out malicious TIFF files.
Educate users about the risks associated with opening files from untrusted sources.

Long-Term Security Practices

Regularly update and patch software to mitigate known vulnerabilities.
Conduct security assessments and penetration testing to identify and address potential weaknesses.
Monitor network traffic for suspicious activities that may indicate exploitation attempts.
Consider implementing application control and whitelisting to restrict unauthorized software execution.
Stay informed about emerging threats and security best practices.

Patching and Updates

Accusoft may release patches or updates to address this vulnerability. Ensure that all systems running Accusoft ImageGear 19.3.0 are updated with the latest security fixes.