Advisory Details

September 8th, 2015

Moxa SoftCMS VLCPlugin ActiveX Control setUserInfoData strUserName Remote Code Execution Vulnerability

ZDI-15-436
ZDI-CAN-3000

CVE ID CVE-2015-6457
CVSS SCORE 6.8, AV:N/AC:M/Au:N/C:P/I:P/A:P
AFFECTED VENDORS Moxa
AFFECTED PRODUCTS SoftCMS
VULNERABILITY DETAILS


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Moxa SoftCMS. 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 processing of the strUserName parameter of the setUserInfoData method of the VLCPlugin control. The user name string is copied to a fixed-length heap buffer without a length validation. An attacker can leverage this vulnerability to gain code execution under the context of the process.
ADDITIONAL DETAILS Moxa has issued an update to correct this vulnerability. More details can be found at:
https://ics-cert.us-cert.gov/advisories/ICSA-15-239-01
DISCLOSURE TIMELINE
  • 2015-06-11 - Vulnerability reported to vendor
  • 2015-09-08 - Coordinated public release of advisory
CREDIT Fritz Sands - HP Zero Day Initiative
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