PT-2021-20295 · Siemens · Siprotec 5

Published 2021-09-14 · Updated 2021-12-14 · CVE-2021-33720

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: SIPROTEC 5 relays with CPU variants CP050 versions prior to V8.80 SIPROTEC 5 relays with CPU variants CP100 versions prior to V8.80 SIPROTEC 5 relays with CPU variants CP300 versions prior to V8.80

Description: A Denial-of-Service condition can be caused by specially crafted packets sent to port 4443/tcp.

Recommendations: For SIPROTEC 5 relays with CPU variants CP050 versions prior to V8.80, update to version V8.80 or later. For SIPROTEC 5 relays with CPU variants CP100 versions prior to V8.80, update to version V8.80 or later. For SIPROTEC 5 relays with CPU variants CP300 versions prior to V8.80, update to version V8.80 or later.

Fix

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

CVE-2021-33720

Affected Products

Siprotec 5

References · 3

• https://cert-portal.siemens.com/productcert/pdf/ssa-847986.pdf · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-33720 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-33720 · Security Note