Advisory Details

July 2nd, 2019

Advantech WebAccess Node viewsrv ftell Untrusted Pointer Dereference Remote Code Execution Vulnerability

CVE ID	CVE-2019-10993
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	WebAccess
VULNERABILITY DETAILS	This vulnerability allows remote attackers to execute arbitrary code on affected installations of Advantech WebAccess Node. Authentication is not required to exploit this vulnerability. The specific flaw exists within the implementation of the 0x277F 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 vulnerability to execute code in the context of Administrator.
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-19-178-05
DISCLOSURE TIMELINE	2019-03-01 - Vulnerability reported to vendor 2019-07-02 - Coordinated public release of advisory
CREDIT	Natnael Samson (@NattiSamson)

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