Totolink T6 HTTP POST Request main buffer overflow
CVE-2023-7221

9.8CRITICAL

Key Information:

Vendor
Totolink
Status
T6
Vendor
CVE Published:
9 January 2024

Badges

👾 Exploit Exists🟡 Public PoC

Summary

A buffer overflow vulnerability has been identified in the Totolink T6 firmware version 4.1.9cu.5241_B20210923. This issue resides within the HTTP POST request handler located in the /cgi-bin/cstecgi.cgi component, specifically affecting the login action. The vulnerability arises from improper handling of the 'v41' argument, enabling an attacker to exploit it remotely. Given its public disclosure, there is a potential risk for malicious exploitation. Despite early notification attempts, the vendor has not responded, leaving users potentially exposed to threats.

Affected Version(s)

T6 4.1.9cu.5241_B20210923

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-2023-7221 - Proof of Concept

References

https://vuldb.com/?id.249855
vdb-entrytechnical-description
https://vuldb.com/?ctiid.249855
signaturepermissions-required
https://github.com/jylsec/vuldb/blob/main/TOTOLINK/T6/1/R...
broken-linkexploit

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

jylsec (VulDB User)
.