Remote Code Execution Flaw in TP-LINK TL-WR841N Routers
CVE-2019-17147

8.8HIGH

Key Information:

Vendor
Tp-link
Status
Tl-wr841n
Vendor
CVE Published:
7 January 2020

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 21%

Summary

This security flaw within the TP-LINK TL-WR841N router permits remote attackers to execute arbitrary code without requiring authentication. The vulnerability arises from improper validation of the Host request header's length when processed by the web service on TCP port 80. As a result, an attacker can exploit this vulnerability to run code as the admin user, potentially compromising the router's integrity and security.

Affected Version(s)

TL-WR841N 0.9.1 4.16 v007c.0 Build 180613 Rel.42415n

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-2019-17147_Practice_Material
Created by DrmnSamoLiu

References

https://www.zerodayinitiative.com/advisories/ZDI-19-992/
x_refsource_MISC
https://www.tp-link.com/us/support/download/tl-wr841n/#Fi...
x_refsource_MISC

EPSS Score

21% chance of being exploited in the next 30 days.

CVSS V3.1

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

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Nguyen Hoang Thach - Security Researcher at VNPT ISC
.