PT-2021-20574 · 3S Smart Software Solutions · Codesys Git

Published 2021-12-01 · Updated 2022-07-28 · CVE-2021-34599

Positive Technologies (AI Summary)

CVSS v3.1

7.4

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: CODESYS Git versions prior to V1.1.0.0

Description: The issue concerns a lack of certificate validation in HTTPS handshakes. CODESYS Git does not implement certificate validation by default, which means it does not verify that the server provides a valid and trusted HTTPS certificate. This lack of verification makes the server connection vulnerable to a man-in-the-middle attack.

Recommendations: For versions prior to V1.1.0.0, update to version V1.1.0.0 or later to resolve the issue. As a temporary workaround, consider disabling HTTPS connections until a patch is available. Restrict access to sensitive data to minimize the risk of exploitation.

Fix

Improper Certificate Validation

Weakness Enumeration

CWE-295

Related Identifiers

CVE-2021-34599

Affected Products

Codesys Git

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2021-34599 · Security Note
• https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16959&token=3ce11e44a3277c4520d732ea2e630f2e06bd46ff&download · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-34599 · Vendor Advisory
• https://t.me/cibsecurity/33176 · Telegram Post
• https://t.me/cvenotify/33898 · Telegram Post
• https://t.me/cvenotify/24034 · Telegram Post