CVE-2025-47276
📋 TL;DR
Actualizer versions before 1.2.0 use OpenSSL's SHA512 for password hashing instead of stronger algorithms like Yescript/Argon2i, making password hashes easier to crack. All users building Debian operating systems with Actualizer are affected. Attackers could potentially crack passwords and gain unauthorized access to systems.
💻 Affected Systems
- Actualizer
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attackers crack root or alpha user passwords, gain full system control, and compromise the entire Debian OS deployment.
Likely Case
Attackers with access to password hashes could crack them offline, leading to unauthorized access to deployed systems.
If Mitigated
With strong passwords and proper network controls, risk is limited to offline hash cracking attempts.
🎯 Exploit Status
Exploitation requires access to password hashes and offline cracking capabilities.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.2.0
Vendor Advisory: https://github.com/ChewKeanHo/Actualizer/security/advisories/GHSA-v626-chv9-v9qr
Restart Required: No
Instructions:
1. Upgrade Actualizer to version 1.2.0 or later. 2. For existing deployments, manually change passwords for root and alpha accounts. 3. Rebuild Debian OS images with updated Actualizer.
🔧 Temporary Workarounds
Manual Password Reset
linuxReset passwords for root and alpha accounts on deployed systems
passwd root
passwd alpha
🧯 If You Can't Patch
- Enforce strong password policies (minimum 12 characters, complexity requirements)
- Implement network segmentation to limit access to affected systems
🔍 How to Verify
Check if Vulnerable:
Check Actualizer version: grep 'VERSION' /path/to/actualizer/script or check installed versionCheck Version:
grep -i version /usr/local/bin/actualizer 2>/dev/null || echo 'Check installation path'Verify Fix Applied:
Verify Actualizer version is 1.2.0 or later and check /etc/shadow for yescript hashes instead of SHA512📡 Detection & Monitoring
Log Indicators:
- Failed authentication attempts for root/alpha accounts
- Successful logins from unusual locations
Network Indicators:
- Unusual SSH/RDP connections to affected systems
SIEM Query:
source="auth.log" AND (user="root" OR user="alpha") AND (event="Failed password" OR event="Accepted password")🔗 References
- https://cheatsheetseries.owasp.org/cheatsheets/Password_Storage_Cheat_Sheet.html
- https://github.com/ChewKeanHo/Actualizer/commit/32c9cc232c856f078f8269fba80ce7562bbff86b
- https://github.com/ChewKeanHo/Actualizer/issues/1
- https://github.com/ChewKeanHo/Actualizer/releases/tag/v1.2.0
- https://github.com/ChewKeanHo/Actualizer/security/advisories/GHSA-v626-chv9-v9qr
- https://github.com/openssl/openssl/issues/19340
- https://www.reddit.com/r/debian/comments/1kknzqi/actualizer_v110_upgraded
