LiteLLM, Information Disclosure, CVE-2025-XXXX (High)

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How the Mentioned CVE Works:

The vulnerability in LiteLLM (CVE-2025-XXXX) arises from insufficient masking of API keys in log files. Specifically, the `litellm_core_utils/litellm_logging.py` file in versions prior to 1.44.12 only masks the first 5 characters of the API key. This means that when API keys are logged, nearly the entire key is exposed, leaving only the first 5 characters obscured. Attackers with access to these logs can easily reconstruct the full API key, leading to unauthorized access to the LiteLLM API and potential misuse of the service. This vulnerability is particularly critical because API keys are often used for authentication and authorization, and their exposure can compromise the entire system.

DailyCVE Form:

Platform: LiteLLM
Version: <1.44.12
Vulnerability: API Key Leakage
Severity: High
Date: Mar 20, 2025

What Undercode Say:

Exploitation:

  1. Log Access: Attackers gain access to log files containing partially masked API keys.
  2. Key Reconstruction: Use the exposed portion of the API key to guess or brute-force the remaining characters.
  3. API Abuse: Use the reconstructed API key to make unauthorized API calls, potentially leading to data breaches or service abuse.

Protection:

  1. Update LiteLLM: Upgrade to version 1.44.12 or later, where the API key masking issue is resolved.
  2. Log Review: Regularly audit log files to ensure no sensitive information is exposed.
  3. Key Rotation: Rotate API keys immediately if logs containing partially masked keys are discovered.

Commands:

1. Check LiteLLM Version:

pip show litellm

2. Upgrade LiteLLM:

pip install --upgrade litellm

3. Search Logs for Exposed Keys:

grep -i "api_key" /path/to/logs/.log

Code Snippets:

1. Mask API Keys Properly (Python):

def mask_api_key(api_key):
return api_key[bash] + '' (len(api_key) - 4) + api_key[bash]

2. Log Sanitization (Python):

import logging
logging.basicConfig(format='%(message)s', level=logging.INFO)
logger = logging.getLogger(<strong>name</strong>)
logger.info(f"API Key: {mask_api_key(api_key)}")

Analytics:

  1. Impact: High risk of API key exposure leading to unauthorized access.
  2. Prevalence: Affects all LiteLLM versions prior to 1.44.12.
  3. Mitigation Rate: Rapid adoption of the patched version reduces exposure.

Additional Recommendations:

  1. Environment Variables: Store API keys in environment variables instead of hardcoding them.
  2. Access Control: Restrict access to log files to authorized personnel only.
  3. Monitoring: Implement real-time monitoring for suspicious API usage patterns.
    By following these steps, users can mitigate the risks associated with CVE-2025-XXXX and ensure the security of their LiteLLM implementations.

References:

Reported By: https://github.com/advisories/GHSA-g5pg-73fc-hjwq
Extra Source Hub:
Undercode

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