Vulnerability identifier: #VU21732

Vulnerability risk: Medium

CVSSv3.1: 6.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2019-13921

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SIMATIC WinAC RTX (F) 2010
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 resource management when processing HTTP requests. A remote attacker can send a specially crafted large HTTP request to the host where WinAC RTX is running, trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

SIMATIC WinAC RTX (F) 2010: All versions

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External links
http://cert-portal.siemens.com/productcert/pdf/ssa-878278.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.