#VU53984 Out-of-bounds write in IGSS Definition - CVE-2021-22754

Vulnerability identifier: #VU53984

Vulnerability risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2021-22754

CWE-ID: CWE-787

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
IGSS Definition
Server applications / Other server solutions

Vendor: Schneider Electric

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input. A remote attacker can create a specially crafted CGF file, trick the victim into opening it using the affected software, trigger out-of-bounds write and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

IGSS Definition: 15.0.0.21140

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External links
https://ics-cert.us-cert.gov/advisories/icsa-21-159-04
https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-159-01

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.