PT-2022-6608 · Schneider Electric · Modicon M340

Published 2022-01-11 · Updated 2022-02-25 · CVE-2022-22724

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Modicon M340 CPUs: BMXP34 (All Versions)

Description A denial of service issue exists due to uncontrolled resource consumption. This could be triggered by sending a large number of TCP RST or FIN packets to any open TCP port of the PLC, affecting ports 80 (HTTP) and 502 (Modbus). The issue may allow a remote attacker to cause a denial of service.

Recommendations For Modicon M340 CPUs: BMXP34 (All Versions), consider implementing network traffic filtering to limit the number of TCP RST or FIN packets that can be sent to the device, as a temporary workaround to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

BDU:2023-02780

CVE-2022-22724

Affected Products

Modicon M340

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2022-22724 · Security Note
• https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2022-011-01 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-02780 · Security Note
• https://t.me/cibsecurity/36913 · Telegram Post