PT-2021-6951 · Myscada · Myscada Mydesigner

Michael Heinzl · Published 2021-11-19 · Updated 2022-07-25 · CVE-2021-43555

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 mySCADA myDESIGNER versions 8.20.0 and prior

Description The issue is related to errors in processing relative paths to directories when importing a project file. This may allow an attacker to plant files on the file system in arbitrary locations or overwrite existing files, resulting in remote code execution. The vulnerability is associated with the improper validation of the contents of an imported project file.

Recommendations For mySCADA myDESIGNER versions 8.20.0 and prior, consider restricting the import of project files from untrusted sources until a patch is available. As a temporary workaround, validate the contents of imported project files manually to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Relative Path Traversal

Path traversal

Weakness Enumeration

CWE-23

CWE-22

Related Identifiers

BDU:2022-02722

CVE-2021-43555

Affected Products

Myscada Mydesigner

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2021-43555 · Security Note
• https://bdu.fstec.ru/vul/2022-02722 · Security Note
• https://us-cert.cisa.gov/ics/advisories/icsa-21-313-04 · Patch
• https://osv.dev/vulnerability/CVE-2021-43555 · Vendor Advisory
• https://cisa.gov/uscert/ics/advisories/icsa-21-313-04 · Note
• https://t.me/cibsecurity/32747 · Telegram Post