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# SSA-165073: Multiple Vulnerabilities in the Webinterface of SICAM P850 and SICAM
P855 Devices

Publication Date:        2022-05-10
Last Update:             2022-05-10
Current Version:         1.0
CVSS v3.1 Base Score:    9.8

SUMMARY
=======

Multiple vulnerabilities were identified in the webserver of SICAM P850
and SICAM P855 devices. These include unauthenticated access to
web-interface functionality, missing HTTPS or impersonation as well as
cross-site scripting related vulnerabilities.

Siemens has released updates for the affected products and recommends to
update to the latest versions.


AFFECTED PRODUCTS AND SOLUTION
==============================


* SICAM P850 (7KG8500-0AA00-0AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743594/

* SICAM P850 (7KG8500-0AA00-2AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743594/

* SICAM P850 (7KG8500-0AA10-0AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743594/

* SICAM P850 (7KG8500-0AA10-2AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743594/

* SICAM P850 (7KG8500-0AA30-0AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743594/

* SICAM P850 (7KG8500-0AA30-2AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743594/

* SICAM P850 (7KG8501-0AA01-0AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743594/

* SICAM P850 (7KG8501-0AA01-2AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743594/

* SICAM P850 (7KG8501-0AA02-0AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743594/

* SICAM P850 (7KG8501-0AA02-2AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743594/

* SICAM P850 (7KG8501-0AA11-0AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743594/

* SICAM P850 (7KG8501-0AA11-2AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743594/

* SICAM P850 (7KG8501-0AA12-0AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743594/

* SICAM P850 (7KG8501-0AA12-2AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743594/

* SICAM P850 (7KG8501-0AA31-0AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743594/

* SICAM P850 (7KG8501-0AA31-2AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743594/

* SICAM P850 (7KG8501-0AA32-0AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743594/

* SICAM P850 (7KG8501-0AA32-2AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743594/

* SICAM P855 (7KG8550-0AA00-0AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743621/

* SICAM P855 (7KG8550-0AA00-2AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743621/

* SICAM P855 (7KG8550-0AA10-0AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743621/

* SICAM P855 (7KG8550-0AA10-2AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743621/

* SICAM P855 (7KG8550-0AA30-0AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743621/

* SICAM P855 (7KG8550-0AA30-2AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743621/

* SICAM P855 (7KG8551-0AA01-0AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743621/

* SICAM P855 (7KG8551-0AA01-2AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743621/

* SICAM P855 (7KG8551-0AA02-0AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743621/

* SICAM P855 (7KG8551-0AA02-2AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743621/

* SICAM P855 (7KG8551-0AA11-0AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743621/

* SICAM P855 (7KG8551-0AA11-2AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743621/

* SICAM P855 (7KG8551-0AA12-0AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743621/

* SICAM P855 (7KG8551-0AA12-2AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743621/

* SICAM P855 (7KG8551-0AA31-0AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743621/

* SICAM P855 (7KG8551-0AA31-2AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743621/

* SICAM P855 (7KG8551-0AA32-0AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743621/

* SICAM P855 (7KG8551-0AA32-2AA0)
  - Affected versions:
       All versions < V3.00
  - Remediation:
       Update to V3.00 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109743621/


WORKAROUNDS AND MITIGATIONS
===========================

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

* Do not access links from untrusted sources while logged in at SICAM P850
or SICAM P855 devices


Product specific remediations or mitigations can be found in the section
"Affected Products and Solution".

Please follow the "General Security Recommendations".


GENERAL SECURITY RECOMMENDATIONS
================================

Operators of critical power systems (e.g. TSOs or DSOs) worldwide are
usually required by regulations to build resilience into the power grids
by applying multi-level redundant secondary protection schemes. It is
therefore recommended that the operators check whether appropriate
resilient protection measures are in place. The risk of cyber incidents
impacting the grid's reliability can thus be minimized by virtue of the
grid design.

Siemens strongly recommends applying the provided security updates using
the corresponding tooling and documented procedures made available with
the product. If supported by the product, an automated means to apply
the security updates across multiple product instances may be used.
Siemens strongly recommends prior validation of any security update
before being applied, and supervision by trained staff of the update
process in the target environment.

As a general security measure Siemens strongly recommends to protect
network access with appropriate mechanisms (e.g. firewalls,
segmentation, VPN). It is advised to configure the environment according
to our operational guidelines in order to run the devices in a protected
IT environment.

Recommended security guidelines can be found at:

https://www.siemens.com/gridsecurity

PRODUCT DESCRIPTION
===================

The SICAM P850 multifunctional measuring device is used for acquisition,
visualization, evaluation and transmission of electrical measured
variables such as alternating current, alternating voltage, frequency,
power, harmonics etc.

The SICAM P855 multifunctional device is used to collect, display and
transmit measured electrical variables such as AC current, AC voltage,
power types, harmonics, etc. The measurands and events are collected and
processed according to the Power Quality Standard IEC 61000-4-30.

VULNERABILITY CLASSIFICATION
============================

The vulnerability classification has been performed by using the CVSS scoring
system in version 3.1 (CVSS v3.1) (https://www.first.org/cvss/). The CVSS
environmental score is specific to the customer's environment and will impact
the overall CVSS score. The environmental score should therefore be
individually defined by the customer to accomplish final scoring.

An additional classification has been performed using the CWE classification, a
community-developed list of common software security weaknesses. This serves as
a common language and as a baseline for weakness identification, mitigation,
and prevention efforts. A detailed list of CWE classes can be found at:
https://cwe.mitre.org/.



* Vulnerability CVE-2022-29872

  Affected devices do not properly validate parameters of POST requests.
  This could allow an authenticated attacker to set the device to a denial
  of service state or to control the program counter and, thus, execute
  arbitrary code on the device.

  CVSS v3.1 Base Score: 8.8
  CVSS Vector:          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
  CWE:                  CWE-141: Improper Neutralization of Parameter/Argument Delimiters

* Vulnerability CVE-2022-29873

  Affected devices do not properly validate parameters of certain GET and
  POST requests. This could allow an unauthenticated attacker to set the
  device to a denial of service state or to control the program counter
  and, thus, execute arbitrary code on the device.

  CVSS v3.1 Base Score: 9.8
  CVSS Vector:          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
  CWE:                  CWE-141: Improper Neutralization of Parameter/Argument Delimiters

* Vulnerability CVE-2022-29874

  Affected devices do not encrypt web traffic with clients but communicate
  in cleartext via HTTP. This could allow an unauthenticated attacker to
  capture the traffic and interfere with the functionality of the device.

  CVSS v3.1 Base Score: 8.8
  CVSS Vector:          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
  CWE:                  CWE-319: Cleartext Transmission of Sensitive Information

* Vulnerability CVE-2022-29876

  Affected devices do not properly handle the input of a GET request
  parameter. The provided argument is directly reflected in the web server
  response. This could allow an unauthenticated attacker to perform
  reflected XSS attacks.

  CVSS v3.1 Base Score: 7.1
  CVSS Vector:          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L/E:P/RL:O/RC:C
  CWE:                  CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site
Scripting')

* Vulnerability CVE-2022-29877

  Affected devices allow unauthenticated access to the web interface
  configuration area. This could allow an attacker to extract internal
  configuration details or to reconfigure network settings. However, the
  reconfigured settings cannot be activated unless the role of an
  authenticated administrator user.

  CVSS v3.1 Base Score: 6.5
  CVSS Vector:          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:P/RL:O/RC:C
  CWE:                  CWE-306: Missing Authentication for Critical Function

* Vulnerability CVE-2022-29878

  Affected devices use a limited range for challenges that are sent during
  the unencrypted challenge-response communication. An unauthenticated
  attacker could capture a valid challenge-response pair generated by a
  legitimate user, and request the webpage repeatedly to wait for the same
  challenge to reappear for which the correct response is known. This
  could allow the attacker to access the management interface of the
  device.

  CVSS v3.1 Base Score: 7.5
  CVSS Vector:          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
  CWE:                  CWE-294: Authentication Bypass by Capture-replay

* Vulnerability CVE-2022-29879

  The web based management interface of affected devices does not employ
  special access protection for certain internal developer views. This
  could allow authenticated users to access critical device information.

  CVSS v3.1 Base Score: 4.3
  CVSS Vector:          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C
  CWE:                  CWE-306: Missing Authentication for Critical Function

* Vulnerability CVE-2022-29880

  Affected devices do not properly validate input in the configuration
  interface. This could allow an authenticated attacker to place
  persistent XSS attacks to perform arbitrary actions in the name of a
  logged user which accesses the affected views.

  CVSS v3.1 Base Score: 6.5
  CVSS Vector:          CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L/E:P/RL:O/RC:C
  CWE:                  CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site
Scripting')

* Vulnerability CVE-2022-29881

  The web based management interface of affected devices does not employ
  special access protection for certain internal developer views. This
  could allow unauthenticated users to extract internal configuration
  details.

  CVSS v3.1 Base Score: 5.3
  CVSS Vector:          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C
  CWE:                  CWE-306: Missing Authentication for Critical Function

* Vulnerability CVE-2022-29882

  Affected devices do not handle uploaded files correctly. An
  unauthenticated attacker could take advantage of this situation to store
  an XSS attack, which could - when a legitimate user accesses the error
  logs - perform arbitrary actions in the name of the user.

  CVSS v3.1 Base Score: 7.1
  CVSS Vector:          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L/E:P/RL:O/RC:C
  CWE:                  CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site
Scripting')

* Vulnerability CVE-2022-29883

  Affected devices do not restrict unauthenticated access to certain pages
  of the web interface. This could allow an attacker to delete log files
  without authentication.

  CVSS v3.1 Base Score: 5.3
  CVSS Vector:          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C
  CWE:                  CWE-287: Improper Authentication


ACKNOWLEDGMENTS
===============

Siemens thanks the following parties for their efforts:

   * Michael Messner from Siemens Energy for reporting the vulnerabilities



ADDITIONAL INFORMATION
======================

For further inquiries on security vulnerabilities in Siemens products and
solutions, please contact the Siemens ProductCERT:

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


HISTORY DATA
============

V1.0 (2022-05-10): Publication Date

TERMS OF USE
============

Siemens Security Advisories are subject to the terms and conditions contained
in Siemens' underlying license terms or other applicable agreements previously
agreed to with Siemens (hereinafter "License Terms"). To the extent applicable
to information, software or documentation made available in or through a
Siemens Security Advisory, the Terms of Use of Siemens' Global Website
(https://www.siemens.com/terms_of_use, hereinafter "Terms of Use"), in
particular Sections 8-10 of the Terms of Use, shall apply additionally. In case
of conflicts, the License Terms shall prevail over the Terms of Use.

Copyright: Siemens 2022
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