Denial of service in Siemens SIMATIC, SINUMERIK, and PROFINET IO

1) Improper input validation

EUVDB-ID: #VU11203

Risk: Low

CVSSv4.0: 2.3 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-4843

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows an adjacent attacker to cause DoS condition on the target system.

The weakness exists due to insufficient validation of user-supplied input. An attacker that is located on the same Ethernet segment (OSI Layer 2) as the targeted device can respond to a PROFINET DCP request with a specially crafted PROFINET DCP packet and cause denial of service.

Mitigation

Install update from vendor's website.

Vulnerable software versions

SIMATIC S7-300: All versions

: All versions

SIMATIC WinAC RTX 2010: All versions

SIMATIC S7-410: All versions

Softnet PROFINET IO for PC-based Windows systems: All versions

SINUMERIK 828D: All versions

SIMATIC S7-400 PN/DP V7: All versions

SIMATIC S7-400 PN/DP V6: All versions

SIMATIC S7-400 H: All versions

: All versions

SIMATIC S7-1500 Software Controller: All versions

SIMATIC CP 443-1 Standard: All versions

SIMATIC CP 443-1 Advanced: All versions

SIMATIC CP 343-1 Standard: All versions

SIMATIC CP 343-1 Advanced: All versions

CPE2.3

• cpe:2.3:h:siemens:simatic_s7-300:*:*:*:*:*:*:*:*
• cpe:2.3::::*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:simatic_winac_rtx_2010:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:simatic_s7-410:*:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:softnet_profinet_io_for_pc-based_windows_systems:*:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:sinumerik_828d:*:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:simatic_s7-400_pn_dp_v7:*:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:simatic_s7-400_pn_dp_v6:*:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:simatic_s7-400_h:*:*:*:*:*:*:*:*
• cpe:2.3::::*:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:simatic_s7-1500_software_controller:*:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:simatic_cp_443-1_standard:*:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:simatic_cp_443-1_advanced:*:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:simatic_cp_343-1_standard:*:*:*:*:*:*:*:*
• cpe:2.3:a:siemens:simatic_cp_343-1_advanced:*:*:*:*:*:*:*:*

External links

https://cert-portal.siemens.com/productcert/pdf/ssa-592007.pdf

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).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.