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Advisories

PLANET GS-4210-16P2S Stack Buffer Overflow and NULL Pointer Dereference via dispatcher.cgi RADIUS Handlers

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severity
medium
date
Affecting

  • PLANET GS-4210-16P2S < 3.441b260626

CWE
  • CWE-121 Stack-based Buffer Overflow
  • CWE-476 NULL Pointer Dereference
CVSS
6.9
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Credit
Jincheng Wang (@winmt), Professor Le Yu of Nanjing University of Posts and Telecommunications, Professor Xiapu Luo of The Hong Kong Polytechnic University
Description
PLANET GS-4210-16P2S firmware before 3.441b260626 contains authenticated stack buffer overflow and null pointer dereference vulnerabilities in /cgi-bin/dispatcher.cgi. The web_radiusSrv*_post family of handlers copies the radKey, radKey_0, radDftParamKey, radName, and radIp POST parameters into fixed-size stack buffers without length validation, and additionally dereferences radName and radIp without verifying their presence in the request. A remote authenticated attacker can send crafted requests to crash the CGI process or web management service, resulting in denial of service.

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