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Advisories

PLANET GS-5220-8P2T2S Stack Buffer Overflow via webstax_auth Cookie

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Severity
critical
Date
Affecting

  • PLANET GS-5220-8P2T2S < 3.2412b261008

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
Tianchang Yang and Syed Rafiul Hussain (SyNSec Lab, Penn State University)
Description
PLANET GS-5220-8P2T2S (hardware version 3.0) firmware versions before 3.2412b261008 contains a stack-based buffer overflow vulnerability that allows unauthenticated attackers to corrupt stack memory by submitting an oversized webstax_auth HTTP Cookie value that is copied into a fixed-size stack buffer without length validation. Attackers can send a crafted unauthenticated HTTP request with an oversized cookie to overwrite the saved return address and corrupt stack memory, leading to memory corruption and potential denial of service on the device.

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