#VU20359 Resource exhaustion in Siemens products - CVE-2019-6568

Vulnerability identifier: #VU20359

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-6568

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SINAMICS SM150
Hardware solutions / Firmware
SINAMICS SM120
Hardware solutions / Firmware
SINAMICS SL150
Hardware solutions / Firmware
SINAMICS GM150
Hardware solutions / Firmware
SINAMICS GL150
Hardware solutions / Firmware
SINAMICS GH150
Hardware solutions / Firmware

Vendor: Siemens

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper input validation in the webserver. A remote attacker can trigger resource exhaustion, perform a denial of service (DoS) attack and restart the webserver of the affected device.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SINAMICS SM150: 4.8

SINAMICS SM120: 4.7 - 4.8

SINAMICS SL150: 4.7 - 4.8

SINAMICS GM150: 4.7 - 4.8

SINAMICS GL150: 4.7 - 4.8

SINAMICS GH150: 4.7 - 4.8

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External links
https://cert-portal.siemens.com/productcert/pdf/ssa-530931.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.