Totolink NR1800X cstecgi.cgi loginAuth stack-based overflow
CVE-2023-7220

9.8CRITICAL

Key Information:

Vendor

Totolink
Status
Nr1800x
Vendor
CVE Published:
9 January 2024

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2023-7220?

The vulnerability in the Totolink NR1800X router arises within the loginAuth function located in the /cgi-bin/cstecgi.cgi file. This issue is specifically triggered when the password argument is manipulated, causing a stack-based buffer overflow. Such a vulnerability can be exploited remotely, potentially compromising the device's integrity. The flaw has been publicly disclosed, raising significant security concerns for users of affected versions. Despite early notifications to the vendor regarding the vulnerability, there has been no response, highlighting the urgency for users to update their devices.

Affected Version(s)

NR1800X 9.1.0u.6279_B20210910

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-2023-7220 - Proof of Concept

References

https://vuldb.com/?id.249854
vdb-entrytechnical-description
https://vuldb.com/?ctiid.249854
signaturepermissions-required
https://github.com/jylsec/vuldb/blob/main/TOTOLINK/NR1800...
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

CVSS V3.0

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)
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