CVE-2021-25311 Explained : Impact and Mitigation

A Directory Traversal vulnerability in condor_credd in HTCondor before 8.9.11 could allow an attacker to create and execute files outside the SEC_CREDENTIAL_DIRECTORY_OAUTH directory, leading to potential remote code execution.

Understanding CVE-2021-25311

This CVE refers to a security flaw in HTCondor that enables attackers to traverse directories and execute malicious files outside the intended directory.

What is CVE-2021-25311?

CVE-2021-25311 is a Directory Traversal vulnerability found in condor_credd in HTCondor versions prior to 8.9.11. Exploiting this flaw could allow an attacker to place and execute unauthorized files in critical system directories.

The Impact of CVE-2021-25311

The impact of this vulnerability is significant as it could result in unauthorized remote code execution, granting attackers the ability to compromise the affected system's security and integrity.

Technical Details of CVE-2021-25311

The technical details of this CVE include the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

condor_credd in HTCondor before version 8.9.11 allows Directory Traversal outside the SEC_CREDENTIAL_DIRECTORY_OAUTH directory. Attackers can create files in unauthorized locations, which may later be executed with elevated privileges.

Affected Systems and Versions

The affected systems include HTCondor versions prior to 8.9.11. Systems running these versions are at risk of exploitation if not patched promptly.

Exploitation Mechanism

By manipulating file paths in the condor_credd component, threat actors can bypass directory restrictions and place malicious files in critical system directories to achieve unauthorized code execution.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-25311, immediate action and long-term security practices are essential.

Immediate Steps to Take

Organizations should apply the latest security patches provided by HTCondor to fix the vulnerability promptly.
Implement access controls and monitor file system activities to detect any unauthorized file creations.

Long-Term Security Practices

Regularly update and patch HTCondor software to mitigate potential security vulnerabilities.
Conduct security assessments and audits to identify and address any existing weaknesses in the system.

Patching and Updates

Maintaining up-to-date software versions and promptly applying security patches are crucial to prevent exploitation of known vulnerabilities like CVE-2021-25311.