Advisory Details

April 8th, 2020

Advantech WebAccess/NMS AccesslogAction SQL Injection Information Disclosure Vulnerability

ZDI-20-398
ZDI-CAN-9605

CVE ID
CVSS SCORE 7.5, AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
AFFECTED VENDORS Advantech
AFFECTED PRODUCTS WebAccess/NMS
VULNERABILITY DETAILS

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Advantech WebAccess/NMS. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the processing of calls to the AccesslogAction.action endpoint. When parsing the user parameter, the process does not properly validate a user-supplied string before using it to construct SQL queries. An attacker can leverage this vulnerability to disclose stored credentials, leading to further compromise.

ADDITIONAL DETAILS Advantech has issued an update to correct this vulnerability. More details can be found at:
https://www.us-cert.gov/ics/advisories/icsa-20-098-01
DISCLOSURE TIMELINE
  • 2019-11-22 - Vulnerability reported to vendor
  • 2020-04-08 - Coordinated public release of advisory
CREDIT rgod of 9sg
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