SB2021111820 - Multiple vulnerabilities in Schneider Electric GUIcon

Description

This security bulletin contains information about 3 vulnerabilities.

1) Out-of-bounds write (CVE-ID: CVE-2021-22807)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: 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

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when a malicious *.gd1 configuration file is loaded into the GUIcon tool. A remote attacker can trigger out-of-bounds write and execute arbitrary code on the target system.

2) Use-after-free (CVE-ID: CVE-2021-22808)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 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

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when a malicious *.gd1 configuration file is loaded into the GUIcon tool. A remote attacker can execute arbitrary code on the target system.

3) Out-of-bounds read (CVE-ID: CVE-2021-22809)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 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

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.

Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References

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