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CVE-2021-27253

Published: Apr 14, 2021Updated: Nov 21, 2024 Sources: CVE List NVDCWE-122
8.8HIGH
NVD MITRE
EPSS Score
1.1%
Top 36.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

Description

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR Nighthawk R7800. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the handling of the rc_service parameter provided to apply_bind.cgi. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-12303.

No summary for this CVE yet.

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
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Weaknesses

CWE-122CWE-787

Affected Products

NETGEAR
commercial·USaka net gear
br200 firmware
Networking Infrastructure
br500 firmware
Networking Infrastructure
d7800 firmware
Networking Infrastructure
ex6100v2 firmware
Networking Infrastructure
ex6150 firmware
Networking Infrastructure
ex6250 firmware
Networking Infrastructure
ex6400 firmware
Networking Infrastructure
ex6400v2 firmware
Networking Infrastructure
and 36 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2021-27253?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://kb.netgear.com/000062883/Security-Advisory-for-Multiple-Vulnerabilities-on-Some-Routers-Satellites-and-Extenders
kb.netgear.com
https://www.zerodayinitiative.com/advisories/ZDI-21-249/
zerodayinitiative.com

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