CVE-2020-7553

Vulnerability

A heap-based buffer overflow vulnerability exists in the IGSS Definition (Def.exe) component of Schneider Electric IGSS, version 14.0.0.20247. The flaw occurs during the parsing of CGF (Configuration Group File) files, where the software fails to properly validate the length of user-supplied data before copying it to a heap-based buffer. This out-of-bounds write condition can be triggered when a user imports a malicious CGF file into IGSS Definition [1].

Exploitation

Exploitation requires user interaction: the target must open a malicious CGF file, either by visiting a compromised web page or by directly opening the file. An attacker can craft a specially formed CGF file that, when parsed, causes a heap-based buffer overflow. No authentication is needed, but the user must be tricked into importing the file [1].

Impact

Successful exploitation allows an attacker to execute arbitrary code in the context of the current process. This can lead to full compromise of the affected system, including confidentiality, integrity, and availability impacts (CVSS 7.8, High) [1].

Mitigation

As of the available references, no official patch or mitigation has been disclosed for this vulnerability. Users should exercise caution when opening CGF files from untrusted sources and monitor vendor advisories for updates [1].