CVE-2021-43337 : Vulnerability Insights and Analysis

SchedMD Slurm 21.08.* before 21.08.4 has Incorrect Access Control, potentially allowing unauthorized access to job scripts and environment files.

Understanding CVE-2021-43337

What is CVE-2021-43337?

CVE-2021-43337 refers to a vulnerability in SchedMD Slurm software versions before 21.08.4, where the access control rules may inadvertently grant users access to job scripts and environment files they should not have permission to view.

The Impact of CVE-2021-43337

This vulnerability could lead to unauthorized disclosure of sensitive job scripts and environment details, potentially compromising the confidentiality of the system and its data.

Technical Details of CVE-2021-43337

Vulnerability Description

The issue arises from Incorrect Access Control settings in SchedMD Slurm 21.08.* before 21.08.4, specifically affecting sites using AccountingStoreFlags=job_script and/or job_env options. This misconfiguration may permit users to request files they are not authorized to access.

Affected Systems and Versions

The vulnerability affects SchedMD Slurm versions 21.08.* before 21.08.4.

Exploitation Mechanism

Attackers with access to the system may leverage this vulnerability to request job scripts and environment files beyond their intended permissions, potentially leading to unauthorized data exposure.

Mitigation and Prevention

Immediate Steps to Take

Update SchedMD Slurm to version 21.08.4 or the latest available patch to mitigate the vulnerability.
Review and adjust access control settings to limit user permissions strictly.

Long-Term Security Practices

Regularly monitor and audit access logs to detect any unauthorized file requests.
Educate users on the importance of data confidentiality and the risks associated with unauthorized access.

Patching and Updates

Ensure timely application of software updates and patches provided by SchedMD to address known security vulnerabilities.