Denial of service in Siemens SCALANCE and RUGGEDCOM Devices
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-25676 |
| CWE-ID | CWE-307 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
RUGGEDCOM RM1224 Hardware solutions / Routers & switches, VoIP, GSM, etc SCALANCE SC-600 Hardware solutions / Routers & switches, VoIP, GSM, etc SCALANCE M-800 / S615 Hardware solutions / Firmware |
| Vendor | Siemens |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Improper Restriction of Excessive Authentication Attempts
EUVDB-ID: #VU51377
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-25676
CWE-ID:
CWE-307 - Improper Restriction of Excessive Authentication Attempts
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to the authentication mechanism has no brute-force prevention. A remote attacker can cause a denial of service condition on the target system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsRUGGEDCOM RM1224: 6.3
SCALANCE M-800 / S615: 6.3
SCALANCE SC-600: before 2.1.3
External linkshttp://ics-cert.us-cert.gov/advisories/icsa-21-068-02
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.
