Octopus Server Directory Traversal via Malicious NuGet Package

Executive Summary

This vulnerability in Octopus Server allows a user with permission to upload a malicious NuGet package to deploy a script step that executes outside the intended parent directory. This could lead to unauthorized file system access or execution of malicious scripts beyond the expected scope.

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Impact Analysis

An attacker could exploit this to gain elevated privileges, execute arbitrary code on the server, or access sensitive files outside the application's intended boundaries. This may result in data breaches, system compromise, or further lateral movement within the network.

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Compliance Impact

This vulnerability could lead to unauthorized data access or exfiltration, violating GDPR's data protection principles or HIPAA's security requirements. Organizations may face compliance violations, legal penalties, or reputational damage if exploited.

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Mitigation Strategies

Update Octopus Server to the latest patched version immediately to prevent script execution outside parent directories. Restrict user permissions to limit who can upload nuget packages. Monitor deployed scripts and server logs for unauthorized activity.

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