Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2023.6825
ICS Advisory | ICSA-23-320-12 Siemens PNI
17 November 2023
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Siemens PNI
Publisher: ICS-CERT
Operating System: Network Appliance
Resolution: Patch/Upgrade
CVE Names: CVE-2023-33135 CVE-2023-33128 CVE-2023-33126
CVE-2023-32032 CVE-2023-29331 CVE-2023-28260
CVE-2023-24936 CVE-2023-24897 CVE-2023-24895
CVE-2023-21808 CVE-2022-41032 CVE-2022-37434
CVE-2022-30184
Original Bulletin:
https://www.cisa.gov/news-events/ics-advisories/icsa-23-320-12
Comment: CVSS (Max): 9.8 CVE-2022-37434 (CVSS:3.1/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/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- --------------------------BEGIN INCLUDED TEXT--------------------
ICS Advisory (ICSA-23-320-12)
Siemens PNI
Release Date
November 16, 2023
As of January 10, 2023, CISA will no longer be updating ICS security advisories
for Siemens product vulnerabilities beyond the initial advisory. For the most
up-to-date information on vulnerabilities in this advisory, please see Siemens'
ProductCERT Security Advisories (CERT Services | Services | Siemens Global).
1. EXECUTIVE SUMMARY
o CVSS v3 9.8
o ATTENTION : Exploitable remotely/low attack complexity
o Vendor : Siemens
o Equipment : SINEC PNI
o Vulnerabilities : Improper Input Validation, Out-of-bounds Write
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow an attacker to
achieve remote code execution, a denial-of-service condition, or perform buffer
overflows.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following products of Siemens, are affected:
o SINEC PNI: Versions prior to V2.0
3.2 Vulnerability Overview
3.2.1 IMPROPER INPUT VALIDATION CWE-20
.NET and Visual Studio Information Disclosure Vulnerability.
CVE-2022-30184 has been assigned to this vulnerability. A CVSS v3 base score of
5.5 has been assigned; the CVSS vector string is ( CVSS:3.1/AV:L/AC:L/PR:N/UI:R
/S:U/C:H/I:N/A:N ).
3.2.2 OUT-OF-BOUNDS WRITE CWE-787
zlib through 1.2.12 has a heap-based buffer over-read or buffer overflow in
inflate in inflate.c via a large gzip header extra field. NOTE: only
applications that call inflateGetHeader are affected. Some common applications
bundle the affected zlib source code but may be unable to call inflateGetHeader
(e.g., see the nodejs/node reference).
CVE-2022-37434 has been assigned to this vulnerability. A CVSS v3 base score of
9.8 has been assigned; the CVSS vector string is ( CVSS:3.1/AV:N/AC:L/PR:N/UI:N
/S:U/C:H/I:H/A:H ).
3.2.3 IMPROPER INPUT VALIDATION CWE-20
NuGet Client Elevation of Privilege Vulnerability.
CVE-2022-41032 has been assigned to this vulnerability. A CVSS v3 base score of
7.8 has been assigned; the CVSS vector string is ( CVSS:3.1/AV:L/AC:L/PR:L/UI:N
/S:U/C:H/I:H/A:H ).
3.2.4 IMPROPER INPUT VALIDATION CWE-20
.NET and Visual Studio Remote Code Execution Vulnerability
CVE-2023-21808 has been assigned to this vulnerability. A CVSS v3 base score of
7.8 has been assigned; the CVSS vector string is ( CVSS:3.1/AV:L/AC:L/PR:N/UI:R
/S:U/C:H/I:H/A:H ).
3.2.5 IMPROPER INPUT VALIDATION CWE-20
.NET, .NET Framework, and Visual Studio Remote Code Execution Vulnerability
CVE-2023-24895 has been assigned to this vulnerability. A CVSS v3 base score of
7.8 has been assigned; the CVSS vector string is ( CVSS:3.1/AV:L/AC:L/PR:N/UI:R
/S:U/C:H/I:H/A:H ).
3.2.6 IMPROPER INPUT VALIDATION CWE-20
.NET, .NET Framework, and Visual Studio Remote Code Execution Vulnerability
CVE-2023-24897 has been assigned to this vulnerability. A CVSS v3 base score of
7.8 has been assigned; the CVSS vector string is ( CVSS:3.1/AV:L/AC:L/PR:N/UI:R
/S:U/C:H/I:H/A:H ).
3.2.7 IMPROPER INPUT VALIDATION CWE-20
.NET, .NET Framework, and Visual Studio Elevation of Privilege Vulnerability
CVE-2023-24936 has been assigned to this vulnerability. A CVSS v3 base score of
7.5 has been assigned; the CVSS vector string is ( CVSS:3.1/AV:N/AC:H/PR:N/UI:R
/S:U/C:H/I:H/A:H ).
3.2.8 IMPROPER INPUT VALIDATION CWE-20
.NET DLL Hijacking Remote Code Execution Vulnerability
CVE-2023-28260 has been assigned to this vulnerability. A CVSS v3 base score of
7.8 has been assigned; the CVSS vector string is ( CVSS:3.1/AV:L/AC:L/PR:L/UI:N
/S:U/C:H/I:H/A:H ).
3.2.9 IMPROPER INPUT VALIDATION CWE-20
.NET, .NET Framework, and Visual Studio Denial of Service Vulnerability
CVE-2023-29331 has been assigned to this vulnerability. A CVSS v3 base score of
7.5 has been assigned; the CVSS vector string is ( CVSS:3.1/AV:N/AC:L/PR:N/UI:N
/S:U/C:N/I:N/A:H ).
3.2.10 IMPROPER INPUT VALIDATION CWE-20
.NET and Visual Studio Elevation of Privilege Vulnerability
CVE-2023-32032 has been assigned to this vulnerability. A CVSS v3 base score of
6.5 has been assigned; the CVSS vector string is ( CVSS:3.1/AV:L/AC:H/PR:L/UI:N
/S:U/C:L/I:H/A:H ).
3.2.11 IMPROPER INPUT VALIDATION CWE-20
.NET and Visual Studio Remote Code Execution Vulnerability
CVE-2023-33126 has been assigned to this vulnerability. A CVSS v3 base score of
7.3 has been assigned; the CVSS vector string is ( CVSS:3.1/AV:L/AC:L/PR:L/UI:R
/S:U/C:H/I:H/A:H ).
3.2.12 IMPROPER INPUT VALIDATION CWE-20
.NET and Visual Studio Remote Code Execution Vulnerability
CVE-2023-33128 has been assigned to this vulnerability. A CVSS v3 base score of
7.3 has been assigned; the CVSS vector string is ( CVSS:3.1/AV:L/AC:L/PR:L/UI:R
/S:U/C:H/I:H/A:H ).
3.2.13 IMPROPER INPUT VALIDATION CWE-20
.NET and Visual Studio Elevation of Privilege Vulnerability
CVE-2023-33135 has been assigned to this vulnerability. A CVSS v3 base score of
7.3 has been assigned; the CVSS vector string is ( CVSS:3.1/AV:L/AC:L/PR:L/UI:R
/S:U/C:H/I:H/A:H ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Germany
3.4 RESEARCHER
Siemens reported these vulnerabilities to CISA.
4. MITIGATIONS
Siemens has identified the following specific workarounds and mitigations users
can apply to reduce risk:
o SINEC PNI: Update to V2.0 or later version
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.
Additional information on industrial security by Siemens can be found on the
Siemens industrial security webpage .
For more information see the associated Siemens security advisory SSA-150063 in
HTML and CSAF .
CISA recommends users take defensive measures to minimize the risk of
exploitation of these vulnerabilities, such as:
o Minimize network exposure for all control system devices and/or systems,
ensuring they are not accessible from the internet .
o Locate control system networks and remote devices behind firewalls and
isolating them from business networks.
o When remote access is required, use more secure methods, such as Virtual
Private Networks (VPNs). Recognize VPNs may have vulnerabilities, should be
updated to the most recent version available, and are only as secure as the
connected devices.
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 CISA products detailing cyber defense
best practices are available for reading and download, including Improving
Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies .
CISA encourages organizations to implement recommended cybersecurity strategies
for proactive defense of ICS assets .
Additional mitigation guidance and recommended practices are publicly available
on the ICS webpage at cisa.gov in the technical information paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies .
Organizations observing suspected malicious activity should follow established
internal procedures and report findings to CISA for tracking and correlation
against other incidents.
CISA also recommends users take the following measures to protect themselves
from social engineering attacks:
o Do not click web links or open attachments in unsolicited email messages.
o Refer to Recognizing and Avoiding Email Scams for more information on
avoiding email scams.
o Refer to Avoiding Social Engineering and Phishing Attacks for more
information on social engineering attacks.
No known public exploitation specifically targeting these vulnerabilities has
been reported to CISA at this time.
5. UPDATE HISTORY
o November 16, 2023: Initial Publication
This product is provided subject to this Notification and this Privacy & Use
policy.
Vendor
Siemens
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
https://www.auscert.org.au/bulletins/
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: https://auscert.org.au/gpg-key/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=NCkx
-----END PGP SIGNATURE-----