Executive Summary

This vulnerability exists in the Huly Platform through version 0.7.423 and is an authenticated server-side request forgery (SSRF) issue in the /import endpoint of the front pod. It allows workspace users who are authenticated to make arbitrary server requests by supplying malicious URLs. Attackers can exploit this flaw to fetch internal services, exfiltrate responses, and replay credentials against backend systems.

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Impact Analysis

The impact of this vulnerability includes unauthorized access to internal services, potential data exfiltration, and misuse of credentials against backend systems. This can lead to exposure of sensitive information, compromise of internal network resources, and further attacks leveraging stolen credentials.

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Compliance Impact

The vulnerability allows authenticated workspace users to make arbitrary server requests, potentially exfiltrating internal service data and replaying credentials against backend systems.

Such unauthorized data access and exfiltration could lead to exposure of sensitive or personal data, which may impact compliance with data protection regulations like GDPR or HIPAA that require safeguarding of personal and sensitive information.

However, the provided information does not explicitly discuss the direct impact on compliance with these standards or any regulatory consequences.

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Detection Guidance

The vulnerability involves an authenticated Server-Side Request Forgery (SSRF) in the /import endpoint of the front pod, which allows workspace users to make arbitrary server requests by supplying malicious URLs.

Detection can focus on monitoring and analyzing requests to the /import endpoint for unusual or unexpected URLs, especially those targeting internal services or cloud metadata endpoints.

Since the vulnerability requires authentication, reviewing logs for authenticated requests to the /import endpoint with suspicious URL parameters or request bodies is recommended.

Commands to detect exploitation attempts might include:

• Using network monitoring tools (e.g., tcpdump, Wireshark) to capture outbound requests from the server to internal IP ranges or unusual external URLs.
• Searching application logs for requests to the /import endpoint containing URLs pointing to internal services or cloud metadata URLs, for example using grep:
• grep -i '/import' /path/to/access.log | grep -E 'http://169.254.169.254|https?://(10\.|172\.(1[6-9]|2[0-9]|3[0-1])\.|192\.168\.)'
• Checking for presence of Cookie headers forwarded in requests to the /import endpoint, which may indicate credential replay attempts.

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Mitigation Strategies

The vulnerability was fixed in commit 68cbf8a, which added SSRF protection to the /import endpoint by implementing URL validation, IP blocking, and other security controls.

Immediate mitigation steps include:

• Upgrade the Huly Platform to a version that includes the fix from commit 68cbf8a or later.
• If upgrading immediately is not possible, restrict access to the /import endpoint to trusted users only and monitor its usage closely.
• Implement network-level controls to block outbound requests from the front pod to internal services or sensitive endpoints.
• Review and rotate any credentials that might have been exposed due to exploitation of this vulnerability.
• Disable or deprecate the /import endpoint if it is not actively used, as it is marked deprecated but remains active.

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