Advisory Details

October 31st, 2018

Advantech WebAccess Node Improper Access Control Privilege Escalation Vulnerability

CVE ID	CVE-2018-17908
CVSS SCORE	8.4, AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS	Advantech
AFFECTED PRODUCTS	WebAccess
VULNERABILITY DETAILS	This vulnerability allows local attackers to escalate privileges on vulnerable installations of Advantech WebAccess Node. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the access controls that are set and modified during the installation of the product. The product installation weakens access control restrictions by disabling User Account Control. An attacker can leverage this vulnerability to execute arbitrary code in the context of the Administrator.
ADDITIONAL DETAILS	Advantech has issued an update to correct this vulnerability. More details can be found at: https://ics-cert.us-cert.gov/advisories/ICSA-18-298-02
DISCLOSURE TIMELINE	2018-08-20 - Vulnerability reported to vendor 2018-10-31 - Coordinated public release of advisory
CREDIT	Mat Powell of Trend Micro Zero Day Initiative

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