Vulnerability identifier: #VU16505

Vulnerability risk: High

CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-11458

CWE-ID: CWE-190

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SINUMERIK 808D
Hardware solutions / Firmware
SINUMERIK 840D
Hardware solutions / Firmware
SINUMERIK 828D
Server applications / SCADA systems

Vendor: Siemens

Description

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

The vulnerability exists due to integer overflow when handling malicious input if Port 4842/TCP is manually opened in the firewall configuration of network Port X130. A remote unauthenticated attacker can specially crafted network requests to Port 4842/TCP, trigger memory corruption and execute arbitrary code with privileged permissions.

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

Mitigation
Update SINUMERIK 828D to version 4.7 SP6 HF1.
Update SINUMERIK 840D to version 4.7 SP6 HF5 or 4.8 SP3.

Vulnerable software versions

SINUMERIK 808D: All versions

SINUMERIK 828D: All versions

SINUMERIK 840D: All versions

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External links
http://cert-portal.siemens.com/productcert/pdf/ssa-170881.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 Internet.

Is there known malware, which exploits this vulnerability?

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