Main Vulnerability Database Vulnerabilities #VU53228

Incorrect calculation in SCALANCE XM-400 and SCALANCE XR-500 - CVE-2020-28393

Published: May 13, 2021

Vulnerability identifier: #VU53228

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-28393

CWE-ID: CWE-682

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to incorrect calculation issue. A remote attacker can send a specially crafted OSPF packet and cause a denial of service condition.

Affected software

SCALANCE XM-400
SCALANCE XR-500

How to mitigate CVE-2020-28393

Install updates from vendor's website.

SCALANCE XM-400 - update to 6.4
SCALANCE XR-500 - update to 6.4

External References

https://cert-portal.siemens.com/productcert/pdf/ssa-116379.pdf
https://us-cert.cisa.gov/ics/advisories/icsa-21-131-10

Related Security Bulletins

Denial of service in Siemens SCALANCE XM-400 and XR-500 Devices