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AUSCERT External Security Bulletin Redistribution
ESB-2022.2357
Advisory (icsa-22-132-07) Siemens SICAM P850 and SICAM P855
13 May 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: Siemens SICAM P850
Siemens SICAM P855
Publisher: ICS-CERT
Operating System: Network Appliance
Resolution: Patch/Upgrade
CVE Names: CVE-2022-29883 CVE-2022-29882 CVE-2022-29881
CVE-2022-29880 CVE-2022-29879 CVE-2022-29878
CVE-2022-29877 CVE-2022-29876 CVE-2022-29874
CVE-2022-29873 CVE-2022-29872
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-22-132-07
Comment: CVSS (Max): 9.8 CVE-2022-29873 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
CVSS Source: ICS-CERT
Calculator: https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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ICS Advisory (ICSA-22-132-07)
Siemens SICAM P850 and SICAM P855
Original release date: May 12, 2022
Legal Notice
All information products included in https://us-cert.cisa.gov/ics are provided
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(DHS) does not provide any warranties of any kind regarding any information
contained within. DHS does not endorse any commercial product or service,
referenced in this product or otherwise. Further dissemination of this product
is governed by the Traffic Light Protocol (TLP) marking in the header. For more
information about TLP, see https://us-cert.cisa.gov/tlp/ .
1. EXECUTIVE SUMMARY
o CVSS v3 9.8
o ATTENTION: Exploitable remotely/low attack complexity
o Vendor: Siemens
o Equipment: Siemens SICAM P850 and SICAM P855
o Vulnerabilities: Improper Neutralization of Parameter/Argument Delimiters,
Cleartext Transmission of Sensitive Information, Cross-site Scripting,
Missing Authentication for Critical Function, Authentication Bypass by
Capture-replay, Improper Authentication
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow an attacker
management interface access, traffic capture, interface with the functionality
of the device, control of the program counter, cause a denial-of-service
condition, loss of device information, and allow arbitrary code execution.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of SICAM P850 and SICAM P855, electrical variable
measuring devices, are affected:
o SICAM P850 7KG8500-0AA00-0AA0: All versions prior to v3.0
o SICAM P850 7KG8500-0AA00-2AA0: All versions prior to v3.0
o SICAM P850 7KG8500-0AA10-0AA0: All versions prior to v3.0
o SICAM P850 7KG8500-0AA10-2AA0: All versions prior to v3.0
o SICAM P850 7KG8500-0AA30-0AA0: All versions prior to v3.0
o SICAM P850 7KG8500-0AA30-2AA0: All versions prior to v3.0
o SICAM P850 7KG8501-0AA01-0AA0: All versions prior to v3.0
o SICAM P850 7KG8501-0AA01-2AA0: All versions prior to v3.0
o SICAM P850 7KG8501-0AA02-0AA0: All versions prior to v3.0
o SICAM P850 7KG8501-0AA02-2AA0: All versions prior to v3.0
o SICAM P850 7KG8501-0AA11-0AA0: All versions prior to v3.0
o SICAM P850 7KG8501-0AA11-2AA0: All versions prior to v3.0
o SICAM P850 7KG8501-0AA12-0AA0: All versions prior to v3.0
o SICAM P850 7KG8501-0AA12-2AA0: All versions prior to v3.0
o SICAM P850 7KG8501-0AA31-0AA0: All versions prior to v3.0
o SICAM P850 7KG8501-0AA31-2AA0: All versions prior to v3.0
o SICAM P850 7KG8501-0AA32-0AA0: All versions prior to v3.0
o SICAM P850 7KG8501-0AA32-2AA0: All versions prior to v3.0
o SICAM P855 7KG8550-0AA00-0AA0: All versions prior to v3.0
o SICAM P855 7KG8550-0AA00-2AA0: All versions prior to v3.0
o SICAM P855 7KG8550-0AA10-0AA0: All versions prior to v3.0
o SICAM P855 7KG8550-0AA10-2AA0: All versions prior to v3.0
o SICAM P855 7KG8550-0AA30-0AA0: All versions prior to v3.0
o SICAM P855 7KG8550-0AA30-2AA0: All versions prior to v3.0
o SICAM P855 7KG8551-0AA01-0AA0: All versions prior to v3.0
o SICAM P855 7KG8551-0AA01-2AA0: All versions prior to v3.0
o SICAM P855 7KG8551-0AA02-0AA0: All versions prior to v3.0
o SICAM P855 7KG8551-0AA02-2AA0: All versions prior to v3.0
o SICAM P855 7KG8551-0AA11-0AA0: All versions prior to v3.0
o SICAM P855 7KG8551-0AA11-2AA0: All versions prior to v3.0
o SICAM P855 7KG8551-0AA12-0AA0: All versions prior to v3.0
o SICAM P855 7KG8551-0AA12-2AA0: All versions prior to v3.0
o SICAM P855 7KG8551-0AA31-0AA0: All versions prior to v3.0
o SICAM P855 7KG8551-0AA31-2AA0: All versions prior to v3.0
o SICAM P855 7KG8551-0AA32-0AA0: All versions prior to v3.0
o SICAM P855 7KG8551-0AA32-2AA0: All versions prior to v3.0
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER NEUTRALIZATION OF PARAMETER/ARGUMENT DELIMITERS CWE-141
The affected devices do not properly validate parameters of POST requests. This
could allow an authenticated attacker to cause a denial-of-service condition or
to control the program counter and execute arbitrary code on the device.
CVE-2022-29872 has been assigned to this vulnerability. A CVSS v3 base score of
8.8 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:L/UI:N/S:U/C:H/
I:H/A:H ).
3.2.2 IMPROPER NEUTRALIZATION OF PARAMETER/ARGUMENT DELIMITERS CWE-141
The affected devices do not properly validate parameters of certain GET and
POST requests. This could allow an unauthenticated attacker to cause a
denial-of-service condition or to control the program counter and execute
arbitrary code on the device.
CVE-2022-29873 has been assigned to this vulnerability. A CVSS v3 base score of
9.8 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/C:H/
I:H/A:H ).
3.2.3 CLEARTEXT TRANSMISSION OF SENSITIVE INFORMATION CWE-319
The 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.
CVE-2022-29874 has been assigned to this vulnerability. A CVSS v3 base score of
8.8 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:R/S:U/C:H/
I:H/A:H ).
3.2.4 IMPROPER NEUTRALIZATION OF INPUT DURING WEB PAGE GENERATION ('CROSS-SITE
SCRIPTING') CWE-79
The 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
cross-site scripting (XSS) attacks.
CVE-2022-29876 has been assigned to this vulnerability. A CVSS v3 base score of
7.1 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:R/S:C/C:L/
I:L/A:L ).
3.2.5 MISSING AUTHENTICATION FOR CRITICAL FUNCTION CWE-306
The 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 attacker achieves the role
of authenticated administrator.
CVE-2022-29877 has been assigned to this vulnerability. A CVSS v3 base score of
6.5 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/C:L/
I:L/A:N ).
3.2.6 AUTHENTICATION BYPASS BY CAPTURE-REPLAY CWE-294
The affected devices use a limited range for challenges 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
the correct response to be revealed. This could allow the attacker to access
the management interface of the device.
CVE-2022-29878 has been assigned to this vulnerability. A CVSS v3 base score of
7.5 has been assigned; the CVSS vector string is ( AV:N/AC:H/PR:N/UI:R/S:U/C:H/
I:H/A:H ).
3.2.7 MISSING AUTHENTICATION FOR CRITICAL FUNCTION CWE-306
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.
CVE-2022-29879 has been assigned to this vulnerability. A CVSS v3 base score of
4.3 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:L/UI:N/S:U/C:L/
I:N/A:N ).
3.2.8 IMPROPER NEUTRALIZATION OF INPUT DURING WEB PAGE GENERATION ('CROSS-SITE
SCRIPTING') CWE-79
The 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 who accesses
the affected views.
CVE-2022-29880 has been assigned to this vulnerability. A CVSS v3 base score of
6.5 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:L/UI:R/S:C/C:L/
I:L/A:L ).
3.2.9 MISSING AUTHENTICATION FOR CRITICAL FUNCTION CWE-306
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.
CVE-2022-29881 has been assigned to this vulnerability. A CVSS v3 base score of
5.3 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/C:L/
I:N/A:N ).
3.2.10 IMPROPER NEUTRALIZATION OF INPUT DURING WEB PAGE GENERATION ('CROSS-SITE
SCRIPTING') CWE-79
The affected devices do not handle uploaded files correctly. An unauthenticated
attacker could take advantage of this to store an XSS attack, which could (when
a legitimate user accesses the error logs) perform arbitrary actions in the
name of the user.
CVE-2022-29882 has been assigned to this vulnerability. A CVSS v3 base score of
7.1 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:R/S:C/C:L/
I:L/A:L ).
3.2.11 IMPROPER AUTHENTICATION CWE-287
The 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.
CVE-2022-29883 has been assigned to this vulnerability. A CVSS v3 base score of
5.3 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/C:N/
I:L/A:N ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Multiple Sectors
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Germany
3.4 RESEARCHER
Michael Messner from Siemens Energy reported these vulnerabilities to Siemens.
4. MITIGATIONS
Siemens has recommended the following:
o Update SICAM P850 to Version 3.0 or later
o Update SICAM P855 to Version 3.0 or later
o Do not access links from untrusted sources while logged in to SICAM P850 or
SICAM P855 devices
As a general security measure, Siemens recommends protecting network access to
devices with appropriate mechanisms. To operate the devices in a protected IT
environment, Siemens recommends configuring the environment according to
Siemens' operational guidelines for industrial security and following
recommendations in the product manuals.
For additional information, please refer to Siemens Security Advisory
SSA-165073
CISA reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices
on the ICS webpage on cisa.gov Several recommended practices are available for
reading and download, including Improving Industrial Control Systems
Cybersecurity with Defense-in-Depth Strategies .
Additional mitigation guidance and recommended practices are publicly available
on the ICS webpage on cisa.gov in the Technical Information Paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies .
Organizations observing any suspected malicious activity should follow their
established internal procedures and report their findings to CISA for tracking
and correlation against other incidents.
No known public exploits specifically target these vulnerabilities.
For any questions related to this report, please contact the CISA at:
Email: CISAservicedesk@cisa.dhs.gov
Toll Free: 1-888-282-0870
CISA continuously strives to improve its products and services. You can help by
choosing one of the links below to provide feedback about this product.
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