PT-2021-11515 · Siemens · Scalance Xm-400+1

Published 2021-05-12 · Updated 2021-05-21 · CVE-2020-28393

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: SCALANCE XM-400 versions prior to v6.4 XR-500 versions prior to v6.4

Description: An unauthenticated remote attacker could create a permanent denial-of-service condition by sending specially crafted OSPF packets. Successful exploitation requires OSPF to be enabled on an affected device.

Recommendations: For SCALANCE XM-400 versions prior to v6.4, update to version v6.4 or later to resolve the issue. For XR-500 versions prior to v6.4, update to version v6.4 or later to resolve the issue. As a temporary workaround, consider disabling OSPF on affected devices until a patch is available.

Fix

Weakness Enumeration

CWE-682

Related Identifiers

CVE-2020-28393

Affected Products

Scalance Xm-400

Xr500

References · 6

• https://cert-portal.siemens.com/productcert/pdf/ssa-116379.pdf · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-28393 · Security Note
• https://osv.dev/vulnerability/CVE-2020-28393 · Vendor Advisory
• https://us-cert.cisa.gov/ics/advisories/icsa-21-131-10 · Note
• https://t.me/cvenotify/14359 · Telegram Post
• https://t.me/cvenotify/14797 · Telegram Post