Advisory Details

February 6th, 2018

Advantech WebAccess Node certUpdate filename Directory Traversal Remote Code Execution Vulnerability

CVE ID	CVE-2018-5445
CVSS SCORE	7.5, AV:N/AC:L/Au:N/C:P/I:P/A:P
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 handling of the filename parameter of certUpdate.asp. The issue results from the lack of proper validation of user-supplied data, which can allow for the upload of arbitrary files. An attacker can leverage this vulnerability to execute code under the context of the current process.
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-18-023-01
DISCLOSURE TIMELINE	2017-12-19 - Vulnerability reported to vendor 2018-02-06 - Coordinated public release of advisory 2018-02-09 - Advisory Updated
CREDIT	rgod

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