CVE-2024-8986: Grafana Plugin SDK Credential Exposure Flaw

CVE-2024-8986 Overview

CVE-2024-8986 is a critical information disclosure vulnerability in the Grafana Plugin SDK that affects how build metadata is bundled into compiled plugin binaries. The SDK executes git remote get-url origin during the build process to retrieve repository URI metadata, which is then embedded directly into the final binary. When developers include authentication credentials in their Git remote URLs (a common practice for accessing private dependencies), these credentials become permanently embedded in the compiled plugin binary, potentially exposing sensitive authentication tokens, passwords, or API keys to anyone with access to the binary.

Critical Impact

Credentials embedded in Git repository URIs may be exposed in compiled Grafana plugin binaries, potentially allowing unauthorized access to private repositories and associated infrastructure.

Affected Products

• Grafana Plugin SDK (versions with embedded build metadata functionality)
• Grafana plugins compiled using the affected SDK versions
• Any environment deploying Grafana plugins built with credentials in repository URIs

Discovery Timeline

• 2024-09-19 - CVE CVE-2024-8986 published to NVD
• 2024-09-20 - Last updated in NVD database

Technical Details for CVE-2024-8986

Vulnerability Analysis

This vulnerability falls under CWE-522 (Insufficiently Protected Credentials) and represents a significant risk in the software supply chain for Grafana plugin development. The core issue lies in the Grafana Plugin SDK's build process, which automatically captures and embeds repository metadata into compiled binaries without sanitizing sensitive information.

When developers configure their Git repositories with credentials embedded in the remote URL (e.g., https://username:token@github.com/org/private-repo.git), these credentials are captured during the build process and permanently stored within the compiled binary. This creates multiple exposure points: the binary itself, any systems where the binary is deployed, and potentially any logs or artifact repositories that store the compiled plugin.

The vulnerability is particularly insidious because developers may not realize their credentials are being exposed—the build process completes normally, and there is no warning or sanitization of sensitive information in the remote URL.

Root Cause

The root cause is the Grafana Plugin SDK's use of the git remote get-url origin command to retrieve repository information during compilation without any validation or sanitization of the returned URI. The SDK blindly embeds whatever URL is configured as the Git remote origin, including any authentication credentials that may be present in the URI format.

This design decision prioritizes capturing complete repository metadata for provenance tracking but fails to account for the common practice of embedding credentials in Git URLs for private repository access.

Attack Vector

An attacker can exploit this vulnerability through multiple vectors:

1. Binary Analysis: Obtaining access to a compiled Grafana plugin binary (through public distribution, internal network access, or supply chain compromise) and extracting the embedded repository URI containing credentials using standard binary analysis tools like strings or hex editors.

2. Artifact Repository Access: Accessing compiled plugins stored in artifact repositories, container images, or deployment packages where the binaries containing embedded credentials may be present.

3. Supply Chain Attack: Leveraging exposed credentials to gain access to private repositories, potentially allowing for source code theft, backdoor insertion, or further lateral movement within the development infrastructure.

The extracted credentials could provide access to private Git repositories, CI/CD systems, or other services depending on the scope of the exposed tokens.

Detection Methods for CVE-2024-8986

Indicators of Compromise

• Presence of authentication tokens or credentials in Git remote URL configurations using the format https://user:token@host/repo
• Compiled Grafana plugin binaries containing cleartext credentials discoverable via binary analysis
• Unexpected access to private repositories from unauthorized sources or IP addresses
• Access logs showing credential usage from systems that should not have those credentials

Detection Strategies

• Implement binary scanning in CI/CD pipelines to detect embedded credentials or secrets in compiled Grafana plugin artifacts
• Utilize secret scanning tools to identify credentials in Git remote configurations before builds occur
• Monitor Git repository access logs for authentication events that may indicate compromised credentials
• Conduct periodic audits of compiled plugin binaries using tools like strings to identify any embedded sensitive data

Monitoring Recommendations

• Enable audit logging on Git repository hosting platforms to track access patterns and detect anomalous credential usage
• Implement alerting for repository access from unexpected geographic locations or IP addresses
• Monitor for bulk repository cloning or unusual API activity that may indicate credential abuse
• Review and audit all Grafana plugin build configurations for embedded credentials in remote URLs

How to Mitigate CVE-2024-8986

Immediate Actions Required

• Audit all Git repository configurations used in Grafana plugin development for credentials embedded in remote URLs
• Rotate any credentials that may have been exposed through compiled plugin binaries
• Review access logs for any private repositories to identify potential unauthorized access
• Remove or replace compiled binaries that may contain embedded credentials

Patch Information

Refer to the Grafana Security Advisory for CVE-2024-8986 for the latest patch information and updated SDK versions that address this vulnerability. Update to the patched version of the Grafana Plugin SDK as soon as it becomes available.

Workarounds

• Reconfigure Git remotes to use SSH-based authentication instead of HTTPS URLs with embedded credentials
• Use credential helpers or Git credential managers that do not embed secrets in the remote URL
• Implement a pre-build script to temporarily sanitize Git remote URLs before compilation and restore them afterward
• Store credentials in environment variables and configure Git to use credential helpers that reference these variables rather than embedding them in URLs

# Configuration example - Switch from HTTPS with embedded credentials to SSH
# Before (vulnerable):
# git remote set-url origin https://username:token@github.com/org/private-repo.git

# After (mitigated):
git remote set-url origin git@github.com:org/private-repo.git

# Alternative: Use Git credential helper instead of embedded credentials
git config --global credential.helper store
git remote set-url origin https://github.com/org/private-repo.git