Session Handling Flaw in TP-Link TL-WR840N and TL-WR841N Routers
CVE-2018-11714

9.8CRITICAL

Key Information:

Vendor

Tp-link
Status
Tl-wr840n Firmware
Vendor
CVE Published:
4 June 2018

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2018-11714?

A flaw has been identified in the TP-Link TL-WR840N and TL-WR841N routers concerning improper session handling within the /cgi/ directory. This vulnerability allows an attacker to bypass authentication entirely by manipulating the Referer HTTP header. Specifically, by presenting a crafted request with the header 'Referer: http://192.168.0.1/mainFrame.htm', unauthorized access to sensitive operations can be achieved, posing significant risks to device integrity and network security. Users are recommended to review their router configuration and consider disabling access to the affected CGI scripts to mitigate potential threats.

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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-2018-11714 - Proof of Concept

References

http://blog.securelayer7.net/time-to-disable-tp-link-home...
x_refsource_MISC
https://www.exploit-db.com/exploits/44781/
exploitx_refsource_EXPLOIT-DB

EPSS Score

5% chance of being exploited in the next 30 days.

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

  • Vulnerability Reserved

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

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