|2017-08-31||Other||Siemens||Maxim Rupp discovered one of these two vulnerabilities.
||N/A||CVE-2017-1273 CVE-2017-1273 ||N/A||N/A||N/A|
# Siemens LOGO!
### VULNERABLE VENDOR
### VULNERABLE PRODUCT
Maxim Rupp discovered one of these two vulnerabilities.
### AFFECTED PRODUCTS
Siemens reports that the vulnerabilities affect the following LOGO! devices:
LOGO!8 BM: All versions.
Successful exploitation of these vulnerabilities could allow an attacker to hijack existing web sessions.
### VULNERABILITY OVERVIEW
INSUFFICIENTLY PROTECTED CREDENTIALS CWE-522
An attacker with network access to the integrated web server on Port 80/TCP could obtain the session ID of an active user session.
A user must be logged in to the web interface.
Siemens recommends that users use the integrated webserver on Port 80/TCP only in trusted networks.
CVE-2017-12734 has been assigned to this vulnerability.
A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
CHANNEL ACCESSIBLE BY NON-ENDPOINT ('MAN-IN-THE-MIDDLE') CWE-300
An attacker who performs a Man-in-the-Middle attack between the LOGO! and other devices could potentially decrypt and modify network traffic.
CVE-2017-12735 has been assigned to this vulnerability.
A CVSS v3 base score of 7.4 has been calculated; the CVSS vector string is (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N)
Critical Infrastructure Sectors: Commercial Facilities, Transportation Systems
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Germany
Siemens provides LOGO!8 BM FS-05 with firmware Version V1.81.2, which fixes the first vulnerability.
Siemens recommends applying the following mitigations for users with existing installations, and for mitigation of the second vulnerability:
Configure the environment according to the recommendations in the user manual:
Apply cell protection concept
Use VPN for protecting network communication between cells
As a general security measure, Siemens strongly recommends protecting network access to the devices with appropriate mechanisms. Siemens advises configuring the environment according to Siemens operational guidelines in order to run the devices in a protected IT environment.
For more information on these vulnerabilities and more detailed mitigation instructions, please see Siemens Security Advisory SSA-087240 at the following location: