Advisory Details

January 5th, 2018

Advantech WebAccess makensis Stack-based Buffer Overflow Remote Code Execution Vulnerability

ZDI-18-023
ZDI-CAN-4991

CVE ID CVE-2017-16724
CVSS SCORE 9.3, (AV:N/AC:M/Au:N/C:C/I:C/A:C)
AFFECTED VENDORS Advantech
AFFECTED PRODUCTS WebAccess
TIPPINGPOINT™ IPS CUSTOMER PROTECTION TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 29657. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Advantech WebAccess. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the parsing of the command line in the makensis utility. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this functionality to execute code under the context of Administrator.

VENDOR RESPONSE Advantech has issued an update to correct this vulnerability. More details can be found at:
https://ics-cert.us-cert.gov/advisories/ICSA-18-004-02
DISCLOSURE TIMELINE
  • 2017-08-04 - Vulnerability reported to vendor
  • 2018-01-05 - Coordinated public release of advisory
CREDIT Steven Seeley (mr_me) of Offensive Security
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