CVE-2021-33633
📋 TL;DR
This OS command injection vulnerability in openEuler's aops-ceres component allows attackers to execute arbitrary commands on affected systems. It affects systems running aops-ceres versions 1.3.0 through 1.4.1 on Linux. The vulnerability exists in the util.py file where user input isn't properly sanitized before being passed to system commands.
💻 Affected Systems
- openEuler aops-ceres
⚠️ 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
Full system compromise with root privileges, allowing complete control over the affected system, data exfiltration, and lateral movement within the network.
Likely Case
Unauthorized command execution with the privileges of the aops-ceres process, potentially leading to service disruption, data manipulation, or installation of backdoors.
If Mitigated
Limited impact due to proper input validation, network segmentation, and least privilege configurations restricting the attack surface.
🎯 Exploit Status
Exploitation requires access to the vulnerable interface. The vulnerability is well-documented in the pull requests showing the code changes needed to fix it.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.4.2 or later
Vendor Advisory: https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2024-1159
Restart Required: Yes
Instructions:
1. Update aops-ceres to version 1.4.2 or later using your package manager. 2. Restart the aops-ceres service. 3. Verify the patch is applied by checking the version.
🔧 Temporary Workarounds
Input Validation Enhancement
linuxImplement strict input validation for all user-supplied data before passing to system commands
# Review and modify ceres/function/util.py to add proper input sanitization
Process Isolation
linuxRun aops-ceres with minimal privileges using a dedicated user account
sudo useradd -r -s /bin/false aopsuser
sudo chown -R aopsuser:aopsuser /path/to/aops-ceres
sudo systemctl edit aops-ceres.service # Add User=aopsuser
🧯 If You Can't Patch
- Implement strict network access controls to limit who can access the aops-ceres service
- Deploy web application firewall (WAF) rules to detect and block command injection attempts
🔍 How to Verify
Check if Vulnerable:
Check the aops-ceres version and examine if the vulnerable code patterns exist in ceres/function/util.pyCheck Version:
rpm -q aops-ceres # or check the package version in your package managerVerify Fix Applied:
Verify the version is 1.4.2 or later and review the patched util.py file for proper input sanitization📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns in system logs
- Unexpected process spawns from aops-ceres
- Failed authentication attempts followed by command execution
Network Indicators:
- Unusual outbound connections from the aops-ceres host
- Traffic patterns indicating data exfiltration
SIEM Query:
source="aops-ceres" AND (command="*;*" OR command="*|*" OR command="*`*" OR command="*$(*")🔗 References
- https://gitee.com/src-openeuler/aops-ceres/pulls/158
- https://gitee.com/src-openeuler/aops-ceres/pulls/159
- https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2024-1159
- https://gitee.com/src-openeuler/aops-ceres/pulls/158
- https://gitee.com/src-openeuler/aops-ceres/pulls/159
- https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2024-1159
