CVE-2017-18196 Explained : Impact and Mitigation

CVE-2017-18196, published on February 23, 2018, identifies a vulnerability in Leptonica version 1.74.4 that could allow local users to bypass file restrictions by manipulating pathnames within the /tmp directory.

Understanding CVE-2017-18196

This CVE highlights a security issue in Leptonica that could potentially be exploited by local users to gain unauthorized access to files.

What is CVE-2017-18196?

The vulnerability in Leptonica version 1.74.4 allows the creation of unintended pathnames with duplicated components in subdirectories of the /tmp directory, enabling local users to bypass file restrictions.

The Impact of CVE-2017-18196

The vulnerability could lead to unauthorized access to files within the /tmp directory, compromising the security and integrity of the system.

Technical Details of CVE-2017-18196

Leptonica version 1.74.4 is affected by this vulnerability, potentially impacting systems using this specific version.

Vulnerability Description

The issue in Leptonica results in the creation of pathnames with duplicated components in subdirectories of the /tmp directory, allowing local users to exploit this behavior.

Affected Systems and Versions

Vendor: n/a
Product: n/a
Version: 1.74.4

Exploitation Mechanism

Local users can manipulate pathnames within the /tmp directory to access files located further within the directory tree, bypassing intended file restrictions.

Mitigation and Prevention

Immediate action is crucial to mitigate the risks associated with CVE-2017-18196.

Immediate Steps to Take

Monitor and restrict access to the /tmp directory.
Implement file system permissions to limit unauthorized access.
Regularly review and audit file access logs.

Long-Term Security Practices

Conduct regular security training for users on file access best practices.
Keep systems and software updated to prevent vulnerabilities.

Patching and Updates

Apply patches or updates provided by Leptonica to address the vulnerability and enhance system security.