CVE-2021-34991

2021-11-1515:40:16

CWE-121

zdi

www.cve.org

netgear

r6400v2

upnp

tcp

port 5000

vulnerability

code execution

root access

CVSS3

8.8

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.002

Percentile

55.6%

JSON

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6400v2 1.0.4.106_10.0.80 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the UPnP service, which listens on TCP port 5000 by default. When parsing the uuid request header, the process does not properly validate the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-14110.

CNA Affected

[
  {
    "product": "R6400v2",
    "vendor": "NETGEAR",
    "versions": [
      {
        "status": "affected",
        "version": "1.0.4.106_10.0.80"
      }
    ]
  }
]