Advisory Details

March 23rd, 2018

OMRON CX-Supervisor SCS Alarm Object Use-After-Free Remote Code Execution Vulnerability

ZDI-18-255
ZDI-CAN-5304

CVE ID CVE-2018-7521
CVSS SCORE 6.8, (AV:N/AC:M/Au:N/C:P/I:P/A:P)
AFFECTED VENDORS OMRON
AFFECTED PRODUCTS CX-Supervisor
VULNERABILITY DETAILS


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of OMRON CX-Supervisor. 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 parsing of SCS project files. When parsing a malformed Alarm object, the process does not properly validate the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code under the context of the current process.

ADDITIONAL DETAILS OMRON has issued an update to correct this vulnerability. More details can be found at:
https://ics-cert.us-cert.gov/advisories/ICSA-18-072-01
DISCLOSURE TIMELINE
  • 2017-10-24 - Vulnerability reported to vendor
  • 2018-03-23 - Coordinated public release of advisory
  • 2018-03-23 - Advisory Updated
CREDIT rgod
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