Remote code execution in Siemens SCALANCE and RUGGEDCOM Devices
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-25667 |
| CWE-ID | CWE-121 |
| Exploitation vector | Local network |
| Public exploit | N/A |
| Vulnerable software |
RUGGEDCOM RM1224 Hardware solutions / Routers & switches, VoIP, GSM, etc SCALANCE SC-600 Hardware solutions / Routers & switches, VoIP, GSM, etc SCALANCE X300WG Hardware solutions / Routers & switches, VoIP, GSM, etc SCALANCE XR-500 Hardware solutions / Routers & switches, VoIP, GSM, etc SCALANCE XM-400 Hardware solutions / Routers & switches, VoIP, GSM, etc SCALANCE Xx200 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) Stack-based buffer overflow
EUVDB-ID: #VU51378
Risk: Medium
CVSSv4.0: 6.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2021-25667
CWE-ID:
CWE-121 - Stack-based buffer overflow
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within the handling of Spanning Tree Protocol (STP) Bridge Protocol Data Unit (BPDU) frames. A remote attacker on the local network can trigger stack-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsRUGGEDCOM RM1224: 4.3
SCALANCE M-800 / S615: 4.3
SCALANCE SC-600: before 2.1.3
SCALANCE X300WG: before 4.1
SCALANCE XR-500: before 6.2
SCALANCE XM-400: before 6.2
SCALANCE Xx200: before 4.1
CPE2.3- cpe:2.3:h:siemens:ruggedcom_rm1224:*:*:*:*:*:*:*:*
- cpe:2.3:h:siemens:ruggedcom_rm1224:4.3:*:*:*:*:*:*:*
- cpe:2.3:h:siemens:scalance_m-800_s615:*:*:*:*:*:*:*:*
- cpe:2.3:h:siemens:scalance_m-800_s615:4.3:*:*:*:*:*:*:*
- cpe:2.3:h:siemens:scalance_sc-600:*:*:*:*:*:*:*:*
- cpe:2.3:h:siemens:scalance_x300wg:*:*:*:*:*:*:*:*
- cpe:2.3:h:siemens:scalance_xr-500:*:*:*:*:*:*:*:*
- cpe:2.3:h:siemens:scalance_xm-400:*:*:*:*:*:*:*:*
- cpe:2.3:h:siemens:scalance_xx200:*:*:*:*:*:*:*:*
https://ics-cert.us-cert.gov/advisories/icsa-21-068-03
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).
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.
