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 2. News & Events
 3. Cybersecurity Advisories
 4. ICS Advisory

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ICS Advisory


FUJITSU SOFTWARE INFRASTRUCTURE MANAGER

Release Date
September 12, 2023
Alert Code
ICSA-23-255-02



VIEW CSAF(LINK IS EXTERNAL)


1. EXECUTIVE SUMMARY

 * CVSS v3 5.9
 * ATTENTION: Low attack complexity
 * Vendor: Fujitsu Software
 * Equipment: Infrastructure Manager
 * Vulnerability: Cleartext Storage of Sensitive Information


2. RISK EVALUATION

Successful exploitation of this vulnerability could result in an attacker
retrieving the password for the proxy server that is configured in ISM from the
maintenance data.


3. TECHNICAL DETAILS


3.1 AFFECTED PRODUCTS

The following versions of Infrastructure Manager are affected:

 * Infrastructure Manager: Advanced Edition V2.8.0.060
 * Infrastructure Manager: Advanced Edition for PRIMEFLEX V2.8.0.060
 * Infrastructure Manager: Essential Edition V2.8.0.060


3.2 VULNERABILITY OVERVIEW

3.2.1 Cleartext Storage of Sensitive Information CWE-312(link is external)

An issue was discovered in Fujitsu Software Infrastructure Manager (ISM) before
2.8.0.061. The ismsnap component (in this specific case at
/var/log/fujitsu/ServerViewSuite/ism/FirmwareManagement/FirmwareManagement.log)
allows insecure collection and storage of authorization credentials in
cleartext. That occurs when users perform any ISM Firmware Repository Address
setup test (Test the Connection), or regularly authorize against an already
configured remote firmware repository site, as set up in ISM Firmware Repository
Address. A privileged attacker is therefore able to potentially gather the
associated ismsnap maintenance data, in the same manner as a trusted party
allowed to export ismsnap data from ISM. The preconditions for an ISM
installation to be generally vulnerable are that the Download Firmware (Firmware
Repository Server) function is enabled and configured, and that the character \
(backslash) is used in a user credential (i.e., user/ID or password) of the
remote proxy host / firmware repository server.

CVE-2023-39903 has been assigned to this vulnerability. A CVSS v3 base score of
5.9 has been assigned; the CVSS vector string is
(AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N(link is external)).


3.3 BACKGROUND

 * CRITICAL INFRASTRUCTURE SECTORS: Multiple
 * COUNTRIES/AREAS DEPLOYED: Worldwide
 * COMPANY HEADQUARTERS LOCATION: Japan


3.4 RESEARCHER

Fujitsu Technology Solutions GmbH and the Fujitsu PSIRT (Europe) reported the
vulnerability to MITRE and Fujitsu Limited. Fujitsu Limited and JPCERT/CC
reported this vulnerability to CISA.


4. MITIGATIONS

Fujitsu Software recommends updating the software to version V2.8.0.061(link is
external), which has been released to fix this vulnerability.

Fujitsu Software recommends, as a workaround, using a user ID and/or a password
for the proxy server not including "\" (backslash) character, when downloading
firmware.

Fujitsu Software recommends, as a workaround, storing the maintenance data in a
trusted location, and deleting when unnecessary.

JPCERT/CC published JVN#38847224(link is external) regarding this issue.

CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability, such as:

 * Minimize network exposure for all control system devices and/or systems,
   ensuring they are not accessible from the internet.
 * Locate control system networks and remote devices behind firewalls and
   isolating them from business networks.
 * When remote access is required, use more secure methods, such as Virtual
   Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should
   be updated to the most current version available. Also recognize VPN is 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/ics. 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/ics 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:

 * Do not click web links or open attachments in unsolicited email messages.
 * Refer to Recognizing and Avoiding Email Scams for more information on
   avoiding email scams.
 * Refer to Avoiding Social Engineering and Phishing Attacks for more
   information on social engineering attacks.

No known public exploitation specifically targeting this vulnerability has been
reported to CISA at this time. This vulnerability is not exploitable remotely.


5. UPDATE HISTORY

 * September 12, 2023: Initial Publication

This product is provided subject to this Notification and this Privacy &
Use policy.


PLEASE SHARE YOUR THOUGHTS

We recently updated our anonymous product survey; we’d welcome your feedback.


RELATED ADVISORIES

Sep 12, 2023
ICS Advisory | ICSA-23-255-01


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Sep 07, 2023
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PHOENIX CONTACT TC ROUTER AND TC CLOUD CLIENT

Sep 07, 2023
ICS Advisory | ICSA-23-250-03


SOCOMEC MOD3GP-SY-120K

Sep 07, 2023
ICS Advisory | ICSA-23-250-01


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