Denial of service in Siemens SCALANCE and RUGGEDCOM Devices



Published: 2021-03-10
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
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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

Description

The 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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

RUGGEDCOM RM1224: 6.3

SCALANCE M-800 / S615: 6.3

SCALANCE SC-600: before 2.1.3


CPE2.3 External links

http://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.



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