CVE-2019-7156 Explained : Impact and Mitigation

A vulnerability in the calculation function calcFileBlockOffset in the ole.c file could lead to a division by zero issue.

Understanding CVE-2019-7156

This CVE entry highlights a potential vulnerability in the calculation function of a specific file.

What is CVE-2019-7156?

The calcFileBlockOffset function in the ole.c file may encounter a division by zero problem, as documented until January 28, 2019.

The Impact of CVE-2019-7156

The vulnerability could potentially lead to system crashes, denial of service, or other security implications.

Technical Details of CVE-2019-7156

This section delves into the technical aspects of the CVE entry.

Vulnerability Description

The calcFileBlockOffset function in ole.c allows division by zero, posing a risk to system stability.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions: Not applicable

Exploitation Mechanism

The vulnerability can be exploited by triggering the specific calculation function with crafted input to induce a division by zero.

Mitigation and Prevention

Protecting systems from CVE-2019-7156 requires immediate actions and long-term security measures.

Immediate Steps to Take

Monitor vendor updates for patches addressing the vulnerability.
Implement input validation to prevent malicious inputs.
Consider restricting access to the affected function until a patch is available.

Long-Term Security Practices

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

Patching and Updates

Apply patches provided by the software vendor to fix the division by zero vulnerability in the calcFileBlockOffset function.