#VU58247 Out-of-bounds read in GUIcon Eurotherm - CVE-2021-22809

Vulnerability identifier: #VU58247

Vulnerability risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-22809

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
GUIcon Eurotherm
Hardware solutions / Firmware

Vendor: Schneider Electric

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition when a malicious *.gd1 configuration file is loaded into the GUIcon tool. A remote attacker can trigger out-of-bounds read error and read contents of memory on the system or perform a denial of service (DoS) attack.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

GUIcon Eurotherm: 2.0.683.003

---

External links
https://ics-cert.us-cert.gov/advisories/icsa-21-313-02
https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-313-07

---

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.