Advantech R-SeeNet show_code Endpoint Stack-based Buffer Overflow Remote Code Execution Vulnerability

October 21st, 2022
ZDI-22-1451 ZDI-CAN-17409

CVE ID

CVE-2022-3385

CVSS Score

9.8 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors

Advantech

Affected Products

R-SeeNet

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Advantech R-SeeNet. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the processing of POST requests sent to the show_code.php endpoint. When processing the filename element, the process does not properly validate the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the service account.

Additional Details

Advantech has issued an update to correct this vulnerability. More details can be found at:
https://www.cisa.gov/uscert/ics/advisories/icsa-22-291-01

Disclosure Timeline

  • 2022-06-06 - Vulnerability reported to vendor
  • 2022-10-21 - Coordinated public release of advisory

Credit

rgod

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