PT-2021-16744 · Siemens · Simatic S7-Plcsim

Published 2021-03-15 · Updated 2021-03-18 · CVE-2021-25673

Positive Technologies (AI Summary)

CVSS v2.0

4.9

Medium

Base vector

AV:L/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions SIMATIC S7-PLCSIM V5.4 (All versions)

Description A Denial-of-Service condition can be caused in the application by an attacker with local access to the system when it is used to open a specially crafted file. As a consequence, the application could enter an infinite loop, become unresponsive, and must be restarted to restore the service.

Recommendations For SIMATIC S7-PLCSIM V5.4, avoid opening specially crafted files until a patch is available. As a temporary workaround, consider restarting the application to restore service in case it becomes unresponsive due to the Denial-of-Service condition.

Fix

Infinite Loop

Weakness Enumeration

CWE-835

Related Identifiers

CVE-2021-25673

Affected Products

Simatic S7-Plcsim

References · 3

• https://cert-portal.siemens.com/productcert/pdf/ssa-256092.pdf · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-25673 · Security Note
• https://t.me/cibsecurity/24913 · Telegram Post