PT-2019-10256 · Openplc · Openplc

Published 2019-04-21 · Updated 2019-04-23 · CVE-2018-20818

Positive Technologies (AI Summary)

CVSS v2.0

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: OpenPLC versions OpenPLC v2 through OpenPLC v3

Description: A buffer overflow issue was found in the modbus.cpp file, specifically in the mapUnusedIO() function. This can lead to a runtime crash of the PLC or potentially have other unspecified effects.

Recommendations: For OpenPLC versions OpenPLC v2 through OpenPLC v3, consider disabling the mapUnusedIO() function as a temporary workaround until a patch is available. Restrict access to the modbus.cpp module to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this issue.

Fix

Buffer Overflow

Weakness Enumeration

CWE-119

Related Identifiers

CVE-2018-20818

Affected Products

Openplc

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2018-20818 · Security Note
• https://arxiv.org/pdf/1809.07477 · Note