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How the CVE Works:
The vulnerability in TOTOLINK EX1200T firmware version 4.1.2cu.5232_B20210713 stems from improper handling of HTTP POST requests in the `/boafrm/formSysLog` endpoint. The `submit-url` argument is processed without proper bounds checking, leading to a buffer overflow. Attackers can craft malicious requests to overwrite adjacent memory, potentially executing arbitrary code or crashing the system. The flaw is remotely exploitable, requiring no authentication, and public exploits exist.
DailyCVE Form:
Platform: TOTOLINK EX1200T
Version: 4.1.2cu.5232_B20210713
Vulnerability: Buffer Overflow
Severity: Critical
Date: 06/23/2025
Prediction: Patch expected by 07/15/2025
What Undercode Say:
curl -X POST -d "submit-url=$(python -c 'print("A"1000)')" http://<target>/boafrm/formSysLog
PoC snippet
payload = "A" 1024
requests.post("http://<target>/boafrm/formSysLog", data={"submit-url": payload})
How Exploit:
- Craft oversized `submit-url` in HTTP POST.
- Overwrite EIP/RIP to hijack execution.
- Deploy ROP chain for code execution.
Protection from this CVE:
- Apply vendor patch.
- Disable remote management.
- Use network segmentation.
Impact:
- Remote code execution.
- Device compromise.
- Network infiltration.
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
