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Advisories

Netis NC63 V3.0.0.3327 Stack Buffer Overflow via destHost Parameter

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severity
critical
date
Affecting

  • NC63 <= 3.0.0.3327

CWE
  • CWE-121 Stack-based Buffer Overflow
CVSS
9.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Credit
Özcan Ersan (@ozcanpng)
Description
Netis NC63 firmware through V3.0.0.3327 contains a stack-based buffer overflow vulnerability that allows unauthenticated remote attackers to overwrite saved stack state by supplying an oversized destHost parameter to the ipFilterList=mod action in netis.cgi. Attackers can exploit widthless sscanf conversions that copy user-supplied input into fixed-size stack buffers before authentication is verified, achieving remote code execution as root due to the Boa web server executing the CGI environment with root privileges.

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