Advisory Details

May 18th, 2018

Advantech WebAccess webvrpcs drawsrv Untrusted Pointer Dereference Remote Code Execution Vulnerability

CVE ID	CVE-2018-7497
CVSS SCORE	9.3, AV:N/AC:M/Au:N/C:C/I:C/A:C
AFFECTED VENDORS	Advantech
AFFECTED PRODUCTS	WebAccess Node
VULNERABILITY DETAILS	This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Advantech WebAccess Node. Authentication is not required to exploit this vulnerability. The specific flaw exists within the implementation of the 0x277e IOCTL in the webvrpcs process. The issue results from the lack of proper validation of a user-supplied value prior to dereferencing it as a pointer. An attacker can leverage this functionality to execute code under the context of 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-18-135-01
DISCLOSURE TIMELINE	2018-02-09 - Vulnerability reported to vendor 2018-05-18 - Coordinated public release of advisory 2018-05-18 - Advisory Updated
CREDIT	Mat Powell - Trend Micro Zero Day Initiative

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