Stack-based Buffer Overflow in Tenda i21 Router
CVE-2024-4251

8.8HIGH

Key Information:

Vendor
Tenda
Status
I21
Vendor
CVE Published:
27 April 2024

Badges

👾 Exploit Exists🟡 Public PoC

Summary

A critical vulnerability has been discovered in the Tenda i21 router, specifically in the 'fromDhcpSetSer' function within the '/goform/DhcpSetSe' URL endpoint. This flaw can be exploited through stack-based buffer overflow via manipulation of various DHCP parameters, including dhcpStartIp, dhcpEndIp, dhcpGw, dhcpMask, dhcpLeaseTime, dhcpDns1, and dhcpDns2. As attackers could exploit this vulnerability remotely, it poses a substantial threat to device security and user data integrity. Despite the disclosure of this vulnerability to the vendor, no response or remedy has been provided, underscoring the urgency for users to secure their devices against potential exploits. For further details, consult the VDB-262142 entry or related resources.

Affected Version(s)

i21 1.0.0.14(4656)

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2024-4251 - Proof of Concept

References

https://vuldb.com/?id.262142
vdb-entrytechnical-description
https://vuldb.com/?ctiid.262142
signaturepermissions-required
https://vuldb.com/?submit.319836
third-party-advisory

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

yhryhryhr_tu (VulDB User)
.