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CVE-2022-27646

High

Description

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6700v3 1.0.4.120_10.0.91 routers. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the circled daemon. A crafted circleinfo.txt file can trigger an overflow of a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-15879.

SeverityHigh
CVSS8.8
Exploit probability—
ProductNetgear R6700 Firmware
PublishedMar 29, 2023
First seenMar 29, 2023
Weakness typeCWE-121CWE-121

How to fix

Update
  • netgear r6700_firmware1.0.4.126 or later
  • netgear r6400_firmware1.0.4.126 or later
  • netgear r6900p_firmware1.3.3.148 or later
  • netgear r7000_firmware1.0.11.134 or later
  • netgear r7000p_firmware1.3.3.148 or later
  • netgear r7850_firmware1.0.5.84 or later
  • netgear r7960p_firmware1.4.3.88 or later
  • netgear r8000_firmware1.0.4.84 or later
  • netgear r8000p_firmware1.4.3.88 or later
  • netgear rax200_firmware1.0.6.138 or later
  • netgear rax75_firmware1.0.6.138 or later
  • netgear rax80_firmware1.0.6.138 or later

Affected products

ProductAffected versionsFixed in
netgear r6700_firmwarev < 1.0.4.1261.0.4.126
netgear r6400_firmwarev < 1.0.4.1261.0.4.126
netgear r6900p_firmwarev < 1.3.3.1481.3.3.148
netgear r7000_firmwarev < 1.0.11.1341.0.11.134
netgear r7000p_firmwarev < 1.3.3.1481.3.3.148
netgear r7850_firmwarev < 1.0.5.841.0.5.84
netgear r7960p_firmwarev < 1.4.3.881.4.3.88
netgear r8000_firmwarev < 1.0.4.841.0.4.84
netgear r8000p_firmwarev < 1.4.3.881.4.3.88
netgear rax200_firmwarev < 1.0.6.1381.0.6.138
netgear rax75_firmwarev < 1.0.6.1381.0.6.138
netgear rax80_firmwarev < 1.0.6.1381.0.6.138
netgear rs400_firmwarev < 1.5.1.861.5.1.86
netgear cbr40_firmwarev < 2.5.0.282.5.0.28
netgear lbr1020_firmwarev < 2.7.4.22.7.4.2
netgear lbr20_firmwarev < 2.7.4.22.7.4.2
netgear rbr10_firmwarev < 2.7.4.242.7.4.24
netgear rbr20_firmwarev < 2.7.4.242.7.4.24
netgear rbr40_firmwarev < 2.7.4.242.7.4.24
netgear rbr50_firmwarev < 2.7.4.242.7.4.24
netgear rbs10_firmwarev < 2.7.4.242.7.4.24
netgear rbs20_firmwarev < 2.7.4.242.7.4.24
netgear rbs40_firmwarev < 2.7.4.242.7.4.24
netgear rbs50_firmwarev < 2.7.4.242.7.4.24

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