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Advisories

PLANET GS-4210-16P2S Memory Corruption via dispatcher.cgi _readHttpParam

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severity
high
date
Affecting

  • PLANET GS-4210-16P2S < 3.441b260626

CWE
  • CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CVSS
8.7
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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 a pre-authentication memory corruption vulnerability in the web management interface where the _readHttpParam function copies an oversized HTTP query string without guaranteeing NUL termination, allowing parse_query_string to process attacker-controlled data into a fixed-size stack buffer. An unauthenticated remote attacker can send an oversized GET request to dispatcher.cgi to cause denial of service of the web management interface and potentially trigger memory corruption.

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