Denial of service in Siemens SCALANCE XM-400 and XR-500 Devices
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2020-28393 |
| CWE-ID | CWE-682 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
SCALANCE XM-400 Hardware solutions / Routers & switches, VoIP, GSM, etc SCALANCE XR-500 Hardware solutions / Routers & switches, VoIP, GSM, etc |
| Vendor | Siemens |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Incorrect calculation
EUVDB-ID: #VU53228
Risk: Medium
CVSSv4.0: 6.6 [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/E:U/U:Green]
CVE-ID: CVE-2020-28393
CWE-ID:
CWE-682 - Incorrect Calculation
Exploit availability: No
DescriptionThe 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.
MitigationInstall updates from vendor's website.
Vulnerable software versionsSCALANCE XM-400: before 6.4
SCALANCE XR-500: before 6.4
CPE2.3 External linkshttps://cert-portal.siemens.com/productcert/pdf/ssa-116379.pdf
https://us-cert.cisa.gov/ics/advisories/icsa-21-131-10
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
