CVE-2021-45101 Explained : Impact and Mitigation

An issue was discovered in HTCondor before 8.8.15, 9.0.x before 9.0.4, and 9.1.x before 9.1.2. A user with only READ access to an HTCondor daemon can potentially control other users' jobs and access their data.

Understanding CVE-2021-45101

What is CVE-2021-45101?

CVE-2021-45101 is a security vulnerability in HTCondor that allows a user with limited access to uncover secrets, potentially leading to unauthorized control over other users' jobs and data.

The Impact of CVE-2021-45101

This vulnerability can result in unauthorized access to sensitive data and unauthorized control over jobs within the HTCondor environment.

Technical Details of CVE-2021-45101

Vulnerability Description

Using standard command-line tools, an attacker with only READ access to an HTCondor SchedD or Collector daemon can exploit this issue.

Affected Systems and Versions

HTCondor versions before 8.8.15
HTCondor versions 9.0.x before 9.0.4
HTCondor versions 9.1.x before 9.1.2

Exploitation Mechanism

The vulnerability allows attackers to discover secrets that could enable them to manipulate other users' jobs and access their data.

Mitigation and Prevention

Immediate Steps to Take

Upgrade affected HTCondor installations to version 8.8.15, 9.0.4, or 9.1.2
Restrict network access to HTCondor daemons
Monitor and review access logs for suspicious activities

Long-Term Security Practices

Implement the principle of least privilege for HTCondor users
Regularly update and patch HTCondor installations

Patching and Updates

Apply the latest patches and updates provided by HTCondor to address this vulnerability.