Advisory Details

January 9th, 2019

Schneider Electric ZelioSoft2 ZM2 File Parsing Use-After-Free Remote Code Execution Vulnerability

ZDI-19-004
ZDI-CAN-7100

CVE ID CVE-2018-7817
CVSS SCORE 7.8, AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AFFECTED VENDORS Schneider Electric
AFFECTED PRODUCTS Zelio Soft 2
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Schneider Electric ZelioSoft 2. 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 ZM2 files. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of the Zelio2 process.

ADDITIONAL DETAILS Schneider Electric has issued an update to correct this vulnerability. More details can be found at:
https://ics-cert.us-cert.gov/advisories/ICSA-19-008-01
DISCLOSURE TIMELINE
  • 2018-08-12 - Vulnerability reported to vendor
  • 2019-01-09 - Coordinated public release of advisory
CREDIT rgod and mdm of 9sg Security Team
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