Remote code execution in Siemens SCALANCE Products

1) Code Injection

EUVDB-ID: #VU65274

Risk: Low

CVSSv4.0: 4.4 [CVSS:4.0/AV:A/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-34821

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: No

Description

The vulnerability allows a remote user to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation within the specific configuration options for OpenVPN. A remote administrator on the local network can send a specially crafted request and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

SCALANCE S615 EEC: All versions

SCALANCE MUM856-1 (RoW): All versions

SCALANCE MUM856-1 (EU): All versions

SCALANCE MUM853-1 (EU): All versions

SCALANCE M876-4 (NAM): All versions

SCALANCE M876-4 (EU): All versions

SCALANCE M876-3 (ROK): All versions

SCALANCE M876-3 (EVDO): All versions

RUGGEDCOM RM1224 LTE(4G) NAM: All versions

RUGGEDCOM RM1224 LTE(4G) EU: All versions

SCALANCE M876-4: All versions

SCALANCE M874-3: All versions

SCALANCE M874-2: All versions

SCALANCE M826-2 SHDSL-Router: All versions

SCALANCE M816-1 ADSL-Router (Annex B): All versions

SCALANCE M816-1 ADSL-Router (Annex A): All versions

SCALANCE M812-1 ADSL-Router (Annex B): All versions

SCALANCE M812-1 ADSL-Router (Annex A): All versions

SCALANCE M804PB: All versions

SCALANCE S615: All versions

SCALANCE SC626-2C: before 3.0

SCALANCE SC622-2C: before 3.0

SCALANCE SC632-2C: before 3.0

SCALANCE SC636-2C: before 3.0

SCALANCE SC642-2C: before 3.0

SCALANCE SC646-2C: before 3.0

CPE2.3

• cpe:2.3:h:siemens:scalance_s615_eec:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:scalance_mum856-1_row:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:scalance_mum856-1_eu:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:scalance_mum853-1_eu:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:scalance_m876-4_nam:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:scalance_m876-4_eu:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:scalance_m876-3_rok:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:scalance_m876-3_evdo:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:ruggedcom_rm1224_lte_4g_nam:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:ruggedcom_rm1224_lte_4g_eu:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:scalance_m876-4:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:scalance_m874-3:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:scalance_m874-2:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:scalance_m826-2_shdsl-router:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:scalance_m816-1_adsl-router_annex_b:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:scalance_m816-1_adsl-router_annex_a:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:scalance_m812-1_adsl-router_annex_b:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:scalance_m812-1_adsl-router_annex_a:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:scalance_m804pb:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:scalance_s615:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:scalance_sc626-2c:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:scalance_sc622-2c:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:scalance_sc632-2c:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:scalance_sc636-2c:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:scalance_sc642-2c:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:scalance_sc646-2c:*:*:*:*:*:*:*:*

External links

https://cert-portal.siemens.com/productcert/txt/ssa-413565.txt

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user 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.