Advisory Details

December 10th, 2018

OMRON CX-One CX-Position NCI File Parsing Stack-Based Buffer Overflow Remote Code Execution Vulnerability

ZDI-18-1366
ZDI-CAN-6603

CVE ID CVE-2018-18993
CVSS SCORE 7.8, (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
AFFECTED VENDORS Omron
AFFECTED PRODUCTS CX-One
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of OMRON CX-One CX-Position. 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 project files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a stack-based buffer. An attacker can leverage this vulnerability to execute code in 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-18-338-01
DISCLOSURE TIMELINE
  • 2018-07-04 - Vulnerability reported to vendor
  • 2018-12-10 - Coordinated public release of advisory
CREDIT Esteban Ruiz (mr_me) of Source Incite
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