CVE-2017-2158 : Security Advisory and Response

In versions 1.73 and prior of Lhaplus, a vulnerability exists in the verification process when expanding ZIP64 archives, potentially leading to the extraction of unintended contents from a specially crafted ZIP64 archive.

Understanding CVE-2017-2158

What is CVE-2017-2158?

CVE-2017-2158 is a vulnerability in Lhaplus versions 1.73 and earlier that allows for the extraction of unintended contents from malicious ZIP64 archives due to improper verification.

The Impact of CVE-2017-2158

This vulnerability could be exploited by an attacker to extract unintended data from a crafted ZIP64 archive, potentially leading to unauthorized access or information disclosure.

Technical Details of CVE-2017-2158

Vulnerability Description

The flaw in Lhaplus versions 1.73 and earlier lies in the inadequate verification process during the expansion of ZIP64 archives, enabling the extraction of unintended contents.

Affected Systems and Versions

Product: Lhaplus
Vendor: Schezo
Versions Affected: Version 1.73 and earlier

Exploitation Mechanism

The vulnerability can be exploited by crafting a malicious ZIP64 archive to trigger the flawed verification process and extract unintended contents.

Mitigation and Prevention

Immediate Steps to Take

Update Lhaplus to a version that addresses the vulnerability
Avoid opening ZIP64 archives from untrusted or unknown sources

Long-Term Security Practices

Regularly update software and apply security patches
Implement network segmentation to limit the impact of potential breaches

Patching and Updates

Ensure that Lhaplus is regularly updated to the latest version to mitigate the vulnerability.