CVE-2017-12376 Explained : Impact and Mitigation

ClamAV AntiVirus software versions 0.99.2 and prior contain a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition or potentially execute arbitrary code on an affected device. The flaw is related to inadequate input validation checks during the handling of Portable Document Format (.pdf) files.

Understanding CVE-2017-12376

This CVE entry pertains to a vulnerability in ClamAV AntiVirus software versions 0.99.2 and earlier that could be exploited by an unauthorized remote attacker.

What is CVE-2017-12376?

The vulnerability in ClamAV AntiVirus software versions 0.99.2 and prior allows attackers to trigger a denial of service (DoS) or execute unauthorized code by sending a manipulated .pdf file to the target device. The flaw arises from insufficient input validation during the processing of .pdf files.

The Impact of CVE-2017-12376

Unauthorized remote attackers can exploit this flaw to initiate a denial of service (DoS) condition or potentially execute unauthorized code on the affected device.

Technical Details of CVE-2017-12376

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

Vulnerability Description

The vulnerability in ClamAV AntiVirus software versions 0.99.2 and earlier stems from a buffer overflow in the handle_pdfname function located in pdf.c. This buffer overflow can be triggered when the software scans a malicious .pdf file.

Affected Systems and Versions

ClamAV AntiVirus software versions 0.99.2 and prior are impacted by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by sending a crafted .pdf file to the affected device, causing a buffer overflow in the handle_pdfname function during the scanning process.

Mitigation and Prevention

Protecting systems from CVE-2017-12376 involves taking immediate steps and implementing long-term security practices.

Immediate Steps to Take

Update ClamAV AntiVirus software to version 0.99.3 or later to mitigate the vulnerability.
Implement network security measures to restrict access to potentially vulnerable services.

Long-Term Security Practices

Regularly update antivirus software and security patches to address known vulnerabilities.
Conduct security assessments and penetration testing to identify and remediate weaknesses in the system.

Patching and Updates

Stay informed about security advisories and updates from ClamAV to promptly apply patches and protect systems from potential threats.