Siemens CP1604 and CP1616 Cross-Site Request Forgery (CVE-2018-13810)

medium Tenable OT Security Plugin ID 501999

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A vulnerability has been identified in CP 1604 (All versions), CP 1616 (All versions). The integrated configuration web server of the affected CP devices could allow a Cross-Site Request Forgery (CSRF) attack if an unsuspecting user is tricked into accessing a malicious link. Successful exploitation requires user interaction by a legitimate user. A successful attack could allow an attacker to trigger actions via the web interface that the legitimate user is allowed to perform. At the time of advisory publication no public exploitation of this vulnerability was known.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

The following text was originally created by the Cybersecurity and Infrastructure Security Agency (CISA). The original can be found at CISA.gov.

Siemens recommends users update to version 2.8.

Siemens has identified the following specific workarounds and mitigations users can apply to reduce the risk:

- Disable the integrated web server. The web server is disabled in the default settings and its use is optional. Use in a productive environment is discouraged.
- Restrict access to the device to the internal or VPN network. Further restrict access to the web interface (80/TCP) and to the telnet port (23/TCP) to trusted IP addresses if possible.
- Do not click on links from unknown sources.

- Fixes for CVE-2018-13808 have also been released in versions v2.5.2.7, v2.6.2.2, and v2.7.2.1.

As a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens’ operational guidelines for industrial security (https://www.siemens.com/cert/operational-guidelines-industrial-security), and following the recommendations in the product manuals.

Additional information on industrial security by Siemens can be found at:

https://www.siemens.com/industrialsecurity

For more information on these vulnerabilities and associated software updates, please see Siemens security advisory SSA-559174 on their website:

https://www.siemens.com/cert/advisories

Plugin Details

Severity: Medium

ID: 501999

Version: 1.5

Type: remote

Family: Tenable.ot

Published: 2/20/2024

Updated: 9/4/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N

CVSS Score Source: CVE-2018-13810

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:siemens:cp_1604_firmware, cpe:/o:siemens:cp_1616_firmware

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 4/17/2019

Vulnerability Publication Date: 4/17/2019

Reference Information

CVE: CVE-2018-13810

CWE: 352

ICSA: 19-043-06

Detections

Analytics