Advisory Details

July 22nd, 2019

Schneider Electric IGSS MDB Database BaseUnits UnitIdx Out-Of-Bounds Write Remote Code Execution Vulnerability

ZDI-19-671
ZDI-CAN-8284

CVE ID CVE-2019-6827
CVSS SCORE 7.0, AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
AFFECTED VENDORS Schneider Electric
AFFECTED PRODUCTS IGSS
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Schneider Electric IGSS. 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 use of the UnitIdx data in the BaseUnits table. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.

ADDITIONAL DETAILS Schneider Electric has issued an update to correct this vulnerability. More details can be found at:
https://www.us-cert.gov/ics/advisories/icsa-19-192-06
DISCLOSURE TIMELINE
  • 2019-05-08 - Vulnerability reported to vendor
  • 2019-07-22 - Coordinated public release of advisory
CREDIT mdm and rgod of 9SG Security Team
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