CVE-2018-18718 : Security Advisory and Response

A flaw was detected in gThumb version 3.6.2, where the add_themes_from_dir function in dlg-contact-sheet.c is vulnerable to a double-free vulnerability.

Understanding CVE-2018-18718

This CVE entry highlights a double-free vulnerability in gThumb version 3.6.2.

What is CVE-2018-18718?

The vulnerability arises from the consecutive usage of g_free, leading to the freeing of the same buffer twice.

The Impact of CVE-2018-18718

The vulnerability could be exploited by an attacker to execute arbitrary code or cause a denial of service (DoS) condition.

Technical Details of CVE-2018-18718

This section provides technical details about the vulnerability.

Vulnerability Description

The add_themes_from_dir function in dlg-contact-sheet.c is susceptible to a double-free vulnerability due to the consecutive usage of g_free.

Affected Systems and Versions

Affected Version: gThumb 3.6.2

Exploitation Mechanism

The vulnerability can be exploited by an attacker to trigger a double-free condition, potentially leading to code execution or DoS.

Mitigation and Prevention

Protective measures to address CVE-2018-18718.

Immediate Steps to Take

Update gThumb to a non-vulnerable version if available.
Avoid opening untrusted files with gThumb.

Long-Term Security Practices

Regularly update software to the latest versions.
Implement secure coding practices to prevent memory-related vulnerabilities.
Conduct security assessments and audits regularly.

Patching and Updates

Apply patches provided by the vendor promptly to mitigate the vulnerability.