CVE-2019-17147

8.8HIGH

Key Information:

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

Badges

👾 Exploit Exists🟡 Public PoC

Summary

This vulnerability allows remote attackers to execute arbitrary code on affected installations of TP-LINK TL-WR841N routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the web service, which listens on TCP port 80 by default. When parsing the Host request header, the process does not properly validate the length of user-supplied data prior to copying it to a fixed-length static buffer. An attacker can leverage this vulnerability to execute code in the context of the admin user. Was ZDI-CAN-8457.

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

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
.