CyberSecBulletin
CVE-2022-27645NVD status: Modified

R6700v3: Incorrect Comparison

Published Updated By the CyberSecBulletin desk

CVE-2022-27645 is a high-severity incorrect comparison vulnerability in R6700v3 from NETGEAR, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited from the same local network by an unauthenticated attacker, without any action from a user. Affected R6700v3 versions: 1.0.4.120_10.0.91. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 1.28% chance of exploitation within 30 days, higher than 70% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Lax20 Firmware to 1.1.6.34 or a later version.
  2. Update R6400 Firmware to 1.0.4.126 or a later version.
  3. Update R6700 Firmware to 1.0.4.126 or a later version.
  4. Read the advisory on kb.netgear.com for workarounds and exact fixed builds.

Affected products and versions

VendorProductAffected versionsFixed in
NETGEARR6700v31.0.4.120_10.0.91Not stated
NETGEARLax20 Firmwarebefore 1.1.6.341.1.6.34
NETGEARR6400 Firmwarebefore 1.0.4.1261.0.4.126
NETGEARR6700 Firmwarebefore 1.0.4.1261.0.4.126
NETGEARR7000 Firmwarebefore 1.0.11.1341.0.11.134
NETGEARR7850 Firmwarebefore 1.0.5.841.0.5.84
NETGEARR7900p Firmwarebefore 1.4.3.881.4.3.88
NETGEARR7960p Firmwarebefore 1.4.3.881.4.3.88
NETGEARR8000 Firmwarebefore 1.0.4.841.0.4.84
NETGEARR8000p Firmwarebefore 1.4.3.881.4.3.88
NETGEARR8500 Firmwarebefore 1.0.2.1581.0.2.158
NETGEARRax15 Firmwarebefore 1.0.10.1101.0.10.110
NETGEARRax20 Firmwarebefore 1.0.10.1101.0.10.110
NETGEARRax200 Firmwarebefore 1.0.6.1381.0.6.138
NETGEARRax35 Firmwarebefore 1.0.10.1101.0.10.110
NETGEARRax38 Firmwarebefore 1.0.10.1101.0.10.110
NETGEARRax40 Firmwarebefore 1.0.10.1101.0.10.110
NETGEARRax42 Firmwarebefore 1.0.10.1101.0.10.110
NETGEARRax43 Firmwarebefore 1.0.10.1101.0.10.110
NETGEARRax45 Firmwarebefore 1.0.10.1101.0.10.110
NETGEARRax48 Firmwarebefore 1.0.10.1101.0.10.110
NETGEARRax50 Firmwarebefore 1.0.10.1101.0.10.110
NETGEARRax50s Firmwarebefore 1.0.10.1101.0.10.110
NETGEARRax75 Firmwarebefore 1.0.6.1381.0.6.138

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
AdjacentThe attacker must be on the same local network segment.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 3.18.8HighNVD
CVSS 3.08.8HighCNA (trendmicro.com)

Official description

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R6700v3 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within readycloud_control.cgi. The issue results from the lack of authentication prior to allowing access to functionality. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-15762.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Incorrect Comparison

The product compares two entities in a security-relevant context, but the comparison is incorrect.

More Incorrect Comparison vulnerabilities (CWE-697)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Third-party and government advisories

Other vulnerabilities in R6700v3

All R6700v3 vulnerabilities

Recent Incorrect Comparison vulnerabilities

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