Advisory Details

May 25th, 2021

Advantech BB-ESWGP506-2SFP-T Use of Hard-coded Credentials Remote Code Execution Vulnerability

ZDI-21-593
ZDI-CAN-11786

CVE ID CVE-2021-22667
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 BB-ESWGP506-2SFP-T
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Advantech BB-ESWGP506-2SFP-T industrial switches. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the telnet service, which listens on TCP port 23 by default. The service contains a hard-coded password for the administrator user account. An attacker can leverage this vulnerability to execute code in the context of the administrator user.
ADDITIONAL DETAILS Advantech has issued an update to correct this vulnerability. More details can be found at:
https://us-cert.cisa.gov/ics/advisories/icsa-21-054-02
DISCLOSURE TIMELINE
  • 2020-12-02 - Vulnerability reported to vendor
  • 2021-05-25 - Coordinated public release of advisory
  • 2021-05-25 - Advisory Updated
CREDIT Anonymous
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