CVE-2021-3166

7.5HIGH

Key Information:

Vendor
Asus
Status
Dsl-n14u B1 Firmware
Vendor
CVE Published:
18 January 2021

Badges

👾 Exploit Exists🟡 Public PoC

Summary

An issue was discovered on ASUS DSL-N14U-B1 1.1.2.3_805 devices. An attacker can upload arbitrary file content as a firmware update when the filename Settings_DSL-N14U-B1.trx is used. Once this file is loaded, shutdown measures on a wide range of services are triggered as if it were a real update, resulting in a persistent outage of those services.

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-2021-3166
Created by kaisersource

References

https://kaisersource.github.io/dsl-n14u
x_refsource_MISC
https://github.com/kaisersource/kaisersource.github.io/bl...
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
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

.