Vulnerability identifier: #VU23594

Vulnerability risk: Medium

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

CVE-ID: CVE-2019-13944

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
EN100 Ethernet module IEC 61850 variant
Hardware solutions / Security hardware applicances
EN100 Ethernet module PROFINET IO variant
Hardware solutions / Security hardware applicances
EN100 Ethernet module Modbus TCP variant
Hardware solutions / Security hardware applicances
EN100 Ethernet module DNP3 TCP variant
Hardware solutions / Security hardware applicances
EN100 Ethernet module IEC 104 variant
Hardware solutions / Security hardware applicances

Vendor: Siemens

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists in the integrated web server due to input validation error when processing directory traversal sequences. A remote attacker can send a specially crafted HTTP request and obtain sensitive information about the device, such as logs and configurations.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

EN100 Ethernet module IEC 61850 variant: All versions

EN100 Ethernet module PROFINET IO variant: All versions

EN100 Ethernet module Modbus TCP variant: All versions

EN100 Ethernet module DNP3 TCP variant: All versions

EN100 Ethernet module IEC 104 variant: All versions

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External links
http://cert-portal.siemens.com/productcert/pdf/ssa-418979.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.