CVE-2025-29625
📋 TL;DR
A buffer overflow vulnerability in Astrolog v7.70 allows attackers to execute arbitrary code or crash the application by passing an overly long environment variable to the FileOpen function. This affects all users running the vulnerable version of Astrolog software.
💻 Affected Systems
- Astrolog
📦 What is this software?
Astrolog by Astrolog
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with the privileges of the Astrolog process, potentially leading to full system compromise.
Likely Case
Denial of Service causing application crashes, with potential for limited code execution in some scenarios.
If Mitigated
Application crash without code execution if exploit fails or mitigations are in place.
🎯 Exploit Status
Exploitation requires setting a malicious environment variable, which can be done through various means including scripts or compromised applications.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v7.71 or later
Vendor Advisory: https://github.com/CruiserOne/Astrolog/issues/25
Restart Required: Yes
Instructions:
1. Download latest version from official Astrolog repository. 2. Uninstall vulnerable version. 3. Install patched version. 4. Restart system.
🔧 Temporary Workarounds
Environment Variable Sanitization
allRestrict environment variable length or block suspicious variables
export ASTROLOG_ENV_MAX=100 (Linux/macOS)
set ASTROLOG_ENV_MAX=100 (Windows)
Application Sandboxing
linux/windowsRun Astrolog in restricted environment to limit exploit impact
firejail --net=none astrolog (Linux)
sandboxie /box:astrolog astrolog.exe (Windows)
🧯 If You Can't Patch
- Remove or restrict Astrolog execution to trusted users only
- Implement strict environment variable controls and monitoring
🔍 How to Verify
Check if Vulnerable:
Check Astrolog version: astrolog -v or examine binary propertiesCheck Version:
astrolog -vVerify Fix Applied:
Verify version is v7.71 or later and test with proof-of-concept exploit📡 Detection & Monitoring
Log Indicators:
- Astrolog crash logs
- Abnormal process termination
- Large environment variable usage
Network Indicators:
- N/A (local vulnerability)
SIEM Query:
process_name:"astrolog" AND (event_type:"crash" OR env_var_size>threshold)