Vulnerability identifier: #VU11203

Vulnerability risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-4843

CWE-ID: CWE-20

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
SIMATIC S7-300
Hardware solutions / Firmware
SIMATIC WinAC RTX 2010
Hardware solutions / Firmware
SIMATIC S7-410
Hardware solutions / Firmware
Softnet PROFINET IO for PC-based Windows systems
Server applications / SCADA systems
SINUMERIK 828D
Server applications / SCADA systems
SIMATIC S7-400 PN/DP V7
Server applications / SCADA systems
SIMATIC S7-400 PN/DP V6
Server applications / SCADA systems
SIMATIC S7-400 H
Server applications / SCADA systems
SIMATIC S7-1500 Software Controller
Server applications / SCADA systems
SIMATIC CP 443-1 Standard
Server applications / SCADA systems
SIMATIC CP 443-1 Advanced
Server applications / SCADA systems
SIMATIC CP 343-1 Standard
Server applications / SCADA systems
SIMATIC CP 343-1 Advanced
Server applications / SCADA systems

Vendor: Siemens

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

:

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

:

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

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External links
http://cert-portal.siemens.com/productcert/pdf/ssa-592007.pdf

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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.