PT-2021-5344 · Wecon · Wecon Plc Editor

Nattisamson · Published 2021-11-11 · Updated 2021-11-23 · CVE-2021-42707

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Wecon PLC Editor versions 1.3.8 and prior

Description The issue is related to an out-of-bounds write in memory while processing project files, which may allow an attacker to execute arbitrary code. This can be exploited by an attacker to gain unauthorized access and control.

Recommendations For Wecon PLC Editor versions 1.3.8 and prior, as a temporary workaround, consider restricting access to project files until a patch is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

BDU:2021-06174

CVE-2021-42707

ZDI-21-1322

Affected Products

Wecon Plc Editor

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2021-42707#range-7187303 · Security Note
• https://bdu.fstec.ru/vul/2021-06174 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-42707 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-21-1322 · Security Note
• https://osv.dev/vulnerability/CVE-2021-42707 · Vendor Advisory
• https://t.me/cibsecurity/32815 · Telegram Post
• https://us-cert.cisa.gov/ics/advisories/icsa-21-315-01 · Note