Authentication Bypass in NETGEAR R6700 Router
CVE-2020-15416

8.8HIGH

Key Information:

Vendor
Netgear
Status
R6700
Vendor
CVE Published:
28 July 2020

Badges

👾 Exploit Exists🟡 Public PoC

Summary

This vulnerability enables network-adjacent attackers to bypass authentication on NETGEAR R6700 routers. The flaw arises from inadequate validation of the length of user-supplied data in the httpd service. This service listens on TCP port 80, and due to the stack-based nature of the buffer involved, an attacker can exploit this vulnerability without needing prior authentication to execute code with root privileges.

Affected Version(s)

R6700 V1.0.4.84_10.0.58

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.

R7000_httpd_BOF_CVE-2020-15416
Created by k3vinlusec

References

https://www.zerodayinitiative.com/advisories/ZDI-20-712/
x_refsource_MISC

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent 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

d4rkn3ss from VNPT ISC
.