CVE-2024-8501 Overview
CVE-2024-8501 is an arbitrary file download vulnerability in the rpc_agent_client component of modelscope/agentscope version 0.0.4. The flaw resides in the download_file method, which fails to validate or restrict requested file paths. Any authenticated user with network access to the RPC agent can retrieve arbitrary files from the host filesystem. Attackers can extract configuration files, credentials, private keys, and system files. This unauthorized data exposure can enable follow-on attacks including privilege escalation and lateral movement. The weakness is classified under [CWE-36] Absolute Path Traversal.
Critical Impact
Authenticated network attackers can download arbitrary files, including credentials and system files, from the host running the agentscope RPC agent.
Affected Products
- modelscope agentscope version 0.0.4
- Deployments exposing the rpc_agent_clientdownload_file method
- Python applications using the vulnerable RPC agent component
Discovery Timeline
- 2025-03-20 - CVE-2024-8501 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-8501
Vulnerability Analysis
The vulnerability stems from improper validation of file path inputs in the download_file method exposed by the rpc_agent_client component. The method accepts a file path argument from the client and returns the contents of the corresponding file on the RPC agent's host. The implementation does not constrain the requested path to a permitted directory or sanitize traversal sequences. As a result, an attacker can supply an absolute path such as /etc/passwd, /root/.ssh/id_rsa, or application configuration files containing secrets. The agentscope framework is designed to enable distributed multi-agent applications, so RPC endpoints are commonly reachable across networks, broadening the attack surface.
Root Cause
The root cause is missing path validation in the file retrieval handler. The download_file method trusts client-supplied paths and performs file reads with the privileges of the RPC agent process. There is no allowlist of permitted directories, no canonicalization to detect traversal, and no authorization check tying the requested resource to the calling identity.
Attack Vector
Exploitation requires network reachability to the RPC agent and low privileges on the client interface. An attacker calls download_file with the absolute path of a target file. The agent reads the file and returns its contents in the RPC response. No user interaction is required. Successful exploitation yields confidentiality, integrity, and availability impacts because exposed credentials enable downstream compromise of dependent systems. Refer to the Huntr Bounty Report for additional context.
Detection Methods for CVE-2024-8501
Indicators of Compromise
- RPC requests to rpc_agent invoking download_file with absolute paths or .. traversal sequences
- Outbound transfers of sensitive files such as /etc/passwd, /etc/shadow, id_rsa, or .env from agentscope hosts
- Unusual read access patterns on application configuration directories by the agentscope process
- Connections from unexpected source addresses to the RPC agent listening port
Detection Strategies
- Inspect application and RPC framework logs for calls to download_file with paths outside the intended working directory
- Deploy file integrity monitoring on sensitive directories to flag reads originating from the agentscope service account
- Apply network detection rules that identify RPC traffic to agentscope agents from untrusted segments
Monitoring Recommendations
- Enable process and file access auditing on hosts running agentscope 0.0.4
- Forward agentscope, RPC, and host telemetry to a centralized analytics platform for correlation
- Alert on the agentscope process reading credential stores, SSH keys, or /etc/ system files
How to Mitigate CVE-2024-8501
Immediate Actions Required
- Upgrade modelscope/agentscope to a version later than 0.0.4 that addresses the download_file path validation issue
- Restrict network exposure of the RPC agent to trusted hosts using firewalls or service mesh policies
- Rotate any credentials, tokens, or keys stored on hosts that ran the vulnerable RPC agent
- Audit historical RPC logs for prior download_file invocations that may indicate exploitation
Patch Information
Review the Huntr Bounty Report and the upstream modelscope/agentscope repository for the fixed release. No vendor advisory URL is listed in the NVD record. Upgrade to the latest available release of agentscope and verify the download_file handler enforces a directory allowlist.
Workarounds
- Run the RPC agent under a dedicated low-privilege user with read access limited to required working directories
- Apply mandatory access controls such as AppArmor or SELinux to confine the agentscope process filesystem view
- Place the RPC agent behind an authenticated reverse proxy that filters or rewrites download_file requests
- Disable or remove the download_file method if file transfer is not required by the deployment
# Configuration example: restrict agentscope service with systemd sandboxing
[Service]
User=agentscope
ProtectSystem=strict
ProtectHome=true
ReadOnlyPaths=/opt/agentscope
ReadWritePaths=/var/lib/agentscope
PrivateTmp=true
NoNewPrivileges=true
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
