PT-2021-3344 · 3S Smart Software Solutions · Codesys

Anton Dorfman + 1 · Published 2021-05-25 · Updated 2021-05-26 · CVE-2021-30195

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 CODESYS V2 runtime system versions prior to 2.4.7.55

Description The issue exists due to the reading of data beyond the boundaries of a specified buffer in the CODESYS Control V2 Linux SysFile library of the CODESYS industrial automation software complex. Exploitation of this issue may allow a remote attacker to cause a denial of service. The problem is caused by improper input validation.

Recommendations For versions prior to 2.4.7.55, update to version 2.4.7.55 or later to resolve the issue. As a temporary workaround, consider restricting access to the system to minimize the risk of exploitation.

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

BDU:2021-03153

CVE-2021-30195

Affected Products

Codesys

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2021-30195 · Security Note
• https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=14725&token=08691519ef764b252630759eff925890176ecd78&download= · Vendor Advisory
• https://customers.codesys.com/index.php · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-03153 · Security Note
• https://osv.dev/vulnerability/CVE-2021-30195 · Vendor Advisory
• https://t.me/cvenotify/14993 · Telegram Post
• https://xakep.ru/2021/06/04/codesys-flaws · Note
• https://t.me/cvenotify/15072 · Telegram Post