PT-2021-4675 · Fatek Automation · Winproladder

Natnael Samson + 2 · Published 2021-06-18 · Updated 2021-10-21 · CVE-2021-38426

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 FATEK Automation WinProladder versions 3.30 and prior

Description The issue is related to an out-of-bounds write operation in memory during the syntactic analysis of PDW files. This can be exploited by an attacker to execute arbitrary code or cause a denial of service. The vulnerability is due to a lack of proper validation of user-supplied data when parsing project files.

Recommendations For FATEK Automation WinProladder versions 3.30 and prior, consider disabling the project file parsing functionality until a patch is available to prevent exploitation. Restrict access to the PDW file parsing module to minimize the risk of arbitrary code execution. Avoid using user-supplied data in project files until the issue is resolved. 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:2021-05368

CVE-2021-38426

ZDI-21-1169

Affected Products

Winproladder

References · 8

• https://zerodayinitiative.com/advisories/ZDI-21-1169 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-38426 · Security Note
• https://safe-surf.ru/upload/VULN/VULN-20211012.2.pdf · Security Note
• https://bdu.fstec.ru/vul/2021-05368 · Security Note
• https://osv.dev/vulnerability/CVE-2021-38426 · Vendor Advisory
• https://cybersecurity-help.cz/vdb/SB2021100805 · Note
• https://us-cert.cisa.gov/ics/advisories/icsa-21-280-06 · Note
• https://t.me/cibsecurity/30684 · Telegram Post