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CVE-2021-34991

Published: Nov 15, 2021Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-121
NVD MITRE
8.8CVSSHIGH
EPSS Score
5.7%
Top 8.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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.

CVSS Vector Breakdown

AV:AAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:AAttack Vector
Adjacent
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-121CWE-787

Affected Products

RS400NETGEARNetworking Infrastructure
EX6120NETGEARNetworking Infrastructure
EX6130NETGEARNetworking Infrastructure
R6400v2NETGEARNetworking Infrastructure
R6700v3NETGEARNetworking Infrastructure
netgearcommercialUSNetworking Infrastructureaka net gear
and 83 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://kb.netgear.com/000064361/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Multiple-Products-PSV-2021-0168
kb.netgear.com
https://www.zerodayinitiative.com/advisories/ZDI-21-1303/
zerodayinitiative.com
https://kb.netgear.com/000064361/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Multiple-Products-PSV-2021-0168
kb.netgear.com

Timeline

Published
Nov 15, 2021
Last Updated
Nov 21, 2024

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