CVE-2017-12111 Explained : Impact and Mitigation

A vulnerability in the xls_addCell function of libxls 1.4 allows remote code execution through specially crafted XLS files.

Understanding CVE-2017-12111

This CVE involves a high-severity vulnerability in libxls 1.4 that enables attackers to execute code remotely by exploiting a memory corruption issue.

What is CVE-2017-12111?

The vulnerability in the xls_addCell function of libxls 1.4 allows unauthorized access and remote code execution by manipulating XLS files.

The Impact of CVE-2017-12111

CVSS Base Score: 8.8 (High Severity)
Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: Required
Confidentiality, Integrity, and Availability Impact: High

Technical Details of CVE-2017-12111

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability in libxls 1.4 enables remote code execution through a formula record in a specially crafted XLS file, leading to memory corruption.

Affected Systems and Versions

Affected Product: libxls
Affected Version: 1.4

Exploitation Mechanism

Attackers can exploit this vulnerability by sending a malicious XLS file containing a specific formula record to trigger memory corruption and execute code remotely.

Mitigation and Prevention

Protecting systems from CVE-2017-12111 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update libxls to a patched version.
Avoid opening XLS files from untrusted sources.
Implement network security measures to detect and block malicious XLS files.

Long-Term Security Practices

Regularly update software and apply security patches.
Conduct security training to educate users on identifying and handling suspicious files.

Patching and Updates

Stay informed about security advisories and updates from libxls.