Compliance Impact

The vulnerability allows authenticated SSH users to access git repositories outside the configured server root directory due to lack of path validation. This unauthorized access to data could potentially lead to exposure of sensitive or regulated information.

Such unauthorized data access may impact compliance with standards and regulations like GDPR and HIPAA, which require strict controls on data access and protection of sensitive information.

However, the description notes that a professional git server should implement additional security controls beyond file system permissions to govern access, implying that relying solely on the vulnerable component increases compliance risk.

Useful 0 Not Useful 0

Executive Summary

This vulnerability is a path traversal issue in the Apache MINA SSHD bundle called sshd-git. It occurs because there is a lack of proper path validation in git operations such as git-upload-pack and git-receive-pack. This flaw allows users who are authenticated over SSH to access git repositories that are located outside the configured root directory of the git server.

Only applications that use the org.apache.sshd:sshd-git component are affected by this vulnerability.

Useful 0 Not Useful 0

Impact Analysis

The vulnerability can allow authenticated SSH users to access git repositories beyond the intended root directory. This unauthorized access can lead to exposure of sensitive or restricted code repositories.

The CVSS score of 7.1 indicates a high severity impact, with high confidentiality impact, low integrity impact, and no availability impact.

Useful 0 Not Useful 0

Mitigation Strategies

To mitigate this vulnerability, users should upgrade affected applications to Apache MINA SSHD version 2.18.0 or later, which contains the fix.

If using pre-release milestones of the upcoming major version 3.0.0, upgrade to 3.0.0-M4 or later.

Additionally, it is recommended that professional git servers implement security controls beyond file system layout and permissions to govern access to git repositories and allowed operations.

Useful 0 Not Useful 0

Detection Guidance

This vulnerability can be detected by identifying if your system is running an affected version of Apache MINA SSHD with the sshd-git bundle (versions 2.0.0 through 2.17.1 or pre-release milestones 3.0.0-M1 through 3.0.0-M3).

Since the vulnerability involves path traversal via git operations over SSH, monitoring SSH git commands such as git-upload-pack and git-receive-pack for unusual access patterns outside the configured git server root directory can help detect exploitation attempts.

Suggested commands to check the installed version and running processes include:

• Check the version of Apache MINA SSHD in your application dependencies or installation: e.g., using package management tools or inspecting application manifests.
• Use commands like `ps aux | grep sshd` to identify running sshd-git processes.
• Monitor SSH git commands in logs or via network traffic analysis to detect git-upload-pack or git-receive-pack operations accessing paths outside the expected repository root.
• Use file system monitoring tools to detect unauthorized access attempts outside the configured git repository directories.

Useful 0 Not Useful 0