CVE-2018-1000857 : Vulnerability Insights and Analysis

A vulnerability related to Directory Traversal has been discovered in versions 0.7 and earlier of the log-user-session software, potentially leading to User to root privilege escalation.

Understanding CVE-2018-1000857

This CVE involves a vulnerability in the Main SUID-binary of log-user-session software that can be exploited for privilege escalation.

What is CVE-2018-1000857?

The vulnerability allows malicious users to escalate their privileges from user to root by exploiting the vulnerable Main SUID-binary.

The Impact of CVE-2018-1000857

The vulnerability poses a significant security risk as it enables unauthorized users to gain root privileges on affected systems.

Technical Details of CVE-2018-1000857

The technical aspects of the vulnerability are as follows:

Vulnerability Description

The vulnerable component is the Main SUID-binary located at /usr/local/bin/log-user-session, which can be exploited for privilege escalation.

Affected Systems and Versions

Versions 0.7 and earlier of the log-user-session software are affected.

Exploitation Mechanism

The attack can occur when a malicious user without sufficient privileges executes the vulnerable binary.
It can also be exploited through the manipulation of (remote) environment variables, similar to the shell-shock vulnerability.

Mitigation and Prevention

To address CVE-2018-1000857, consider the following mitigation strategies:

Immediate Steps to Take

Disable the vulnerable Main SUID-binary if not essential for system functionality.
Monitor system logs for any suspicious activities related to the log-user-session software.

Long-Term Security Practices

Implement the principle of least privilege to restrict user access rights.
Regularly update and patch the log-user-session software to eliminate known vulnerabilities.

Patching and Updates

Apply patches provided by the software vendor to fix the vulnerability and enhance system security.