CVE-2017-6967 : Vulnerability Insights and Analysis

xrdp 0.9.1 incorrectly places the PAM function auth_start_session(), leading to improper initialization of PAM session modules. This can result in incorrect configurations or privilege escalation, known as a pam_limits.so bypass.

Understanding CVE-2017-6967

This CVE involves a vulnerability in xrdp 0.9.1 that can potentially allow privilege escalation due to improper PAM session module initialization.

What is CVE-2017-6967?

The vulnerability in xrdp 0.9.1 allows for the incorrect placement of the PAM function auth_start_session(), leading to potential privilege escalation and misconfigurations.

The Impact of CVE-2017-6967

The vulnerability could result in an attacker bypassing restrictions set by pam_limits.so, potentially gaining unauthorized access or escalating privileges on affected systems.

Technical Details of CVE-2017-6967

This section provides more technical insights into the vulnerability.

Vulnerability Description

xrdp 0.9.1 incorrectly calls the PAM function auth_start_session(), causing PAM session modules to initialize improperly, opening the door to privilege escalation and misconfigurations.

Affected Systems and Versions

Affected Version: xrdp 0.9.1
Systems running xrdp 0.9.1 are vulnerable to this issue.

Exploitation Mechanism

The vulnerability arises from the incorrect placement of the PAM function auth_start_session(), which can be exploited by attackers to bypass restrictions and potentially elevate their privileges.

Mitigation and Prevention

To address CVE-2017-6967, follow these mitigation strategies:

Immediate Steps to Take

Update xrdp to a patched version that addresses the vulnerability.
Monitor system logs for any suspicious activities indicating a potential exploit.

Long-Term Security Practices

Regularly update software and apply security patches to prevent known vulnerabilities.
Implement least privilege access controls to limit the impact of potential privilege escalation attacks.

Patching and Updates

Stay informed about security updates for xrdp and promptly apply patches to secure the system against known vulnerabilities.