Advisories

NetComm NF20MESH < R6B032 Hardcoded AES Key Authentication Bypass

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severity
critical
date
Affecting
  • NF20MESH < R6B032

CWE
  • CWE-321 Use of Hard-coded Cryptographic Key
CVSS
9.2
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Credit
Brendan Scarvell of Signal 11
Description
NetComm NF20MESH routers running firmware R6B031 and earlier contain an authentication bypass vulnerability that allows unauthenticated attackers to gain administrative access by exploiting a hardcoded AES-256 key used to encrypt session cookies for the web management interface. Attackers can forge a valid encrypted session cookie using the shared hardcoded key and bypass authentication checks to obtain full administrative control of the management interface while any legitimate administrator session is active.

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