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AUSCERT External Security Bulletin Redistribution
ESB-2023.6008
ICS Advisory | ICSA-23-278-01 Hitachi Energy AFS65x, AFF66x,
AFS67x, and AFR67x Series Products
13 October 2023
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AusCERT Security Bulletin Summary
---------------------------------
Product: Hitachi Energy AFS65x, AFF66x, AFS67x, and AFR67x Series Products
Publisher: ICS-CERT
Operating System: Network Appliance
Resolution: Patch/Upgrade
CVE Names: CVE-2022-25315 CVE-2022-25314 CVE-2022-25236
CVE-2022-25235 CVE-2022-23990 CVE-2022-23852
CVE-2022-22827 CVE-2022-22826 CVE-2022-22825
CVE-2022-22824 CVE-2022-22823 CVE-2022-22822
CVE-2021-46143 CVE-2021-45960
Original Bulletin:
https://www.cisa.gov/news-events/ics-advisories/icsa-23-278-01
Comment: CVSS (Max): 9.8 CVE-2022-25315 (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-23-278-01)
Hitachi Energy AFS65x, AFF66x, AFS67x, and AFR67x Series Products
Release Date
October 05, 2023
1. EXECUTIVE SUMMARY
o CVSS v3 9.8
o ATTENTION : Exploitable remotely/low attack complexity
o Vendor : Hitachi Energy
o Equipment : AFS65x, AFF66x, AFS67x, AFR67x Series
o Vulnerabilities : Incorrect Calculation, Integer Overflow or Wraparound,
Improper Encoding or Escaping of Output, Exposure of Resource to Wrong
Sphere
2. RISK EVALUATION
Successful exploitation of these vulnerabilities by an attacker could have a
high impact on availability, integrity, and confidentiality of the targeted
devices.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following Hitachi Energy products and versions are affected:
o AFF66X FW: 03.0.02 and prior
o AFS66X-S: All versions
o AFS660-C: All versions
o AFS66X-B: All versions
o AFS670-V20: All versions
o AFS65X: All versions
o AFS67X: All versions
o AFR677: All versions
3.2 Vulnerability Overview
3.2.1 INCORRECT CALCULATION CWE-682
In Expat (aka libexpat) before 2.4.3, a left shift by 29(or more) places in the
storeAtts function in xmlparse.c can lead to realloc misbehavior (e.g.,
allocating too few bytes, or only freeing memory).
CVE-2021-45960 has been assigned to this vulnerability. A CVSS v3 base score of
8.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:L/UI:N/S:U/
C:H/I:H/A:H ).
3.2.2 INTEGER OVERFLOW OR WRAPAROUND CWE-190
In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer
overflow exists for m_groupSize.
CVE-2021-46143 has been assigned to this vulnerability. A CVSS v3 base score of
7.8 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U/
C:H/I:H/A:H ).
3.2.3 INTEGER OVERFLOW OR WRAPAROUND CWE-190
Vulnerable code using addBinding in xmlparse.c in Expat (aka libexpat) before
2.4.3 has an integer overflow.
CVE-2022-22822 has been assigned to this vulnerability. A CVSS v3 base score of
9.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:H/I:H/A:H ).
3.2.4 INTEGER OVERFLOW OR WRAPAROUND CWE-190
Vulnerable code using build_model in xmlparse.c in Expat (aka libexpat) before
2.4.3 has an integer overflow.
CVE-2022-22823 has been assigned to this vulnerability. A CVSS v3 base score of
9.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:H/I:H/A:H ).
3.2.5 INTEGER OVERFLOW OR WRAPAROUND CWE-190
Vulnerable code using defineAttribute in xmlparse.c in Expat (aka libexpat)
before 2.4.3 has an integer overflow.
CVE-2022-22824 has been assigned to this vulnerability. A CVSS v3 base score of
9.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:H/I:H/A:H ).
3.2.6 INTEGER OVERFLOW OR WRAPAROUND CWE-190
The lookup in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer
overflow.
CVE-2022-22825 has been assigned to this vulnerability. A CVSS v3 base score of
8.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:R/S:U/
C:H/I:H/A:H ).
3.2.7 INTEGER OVERFLOW OR WRAPAROUND CWE-190
Vulnerable code using nextScaffoldPart in xmlparse.c in Expat (aka libexpat)
before 2.4.3 has an integer overflow
CVE-2022-22826 has been assigned to this vulnerability. A CVSS v3 base score of
8.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:R/S:U/
C:H/I:H/A:H ).
3.2.8 INTEGER OVERFLOW OR WRAPAROUND CWE-190
An insecure direct object reference for the file-download URL in Synametrics
SynaMan before 5.0 allows a remote attacker to access unshared files via a
modified base64-encoded filename string.
CVE-2022-22827 has been assigned to this vulnerability. A CVSS v3 base score of
7.5 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:H/I:N/A:N ).
3.2.9 INTEGER OVERFLOW OR WRAPAROUND CWE-190
In Expat (aka libexpat) before 2.4.5, there is an integer overflow in
copyString.
CVE-2022-25314 has been assigned to this vulnerability. A CVSS v3 base score of
7.5 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:N/I:N/A:H ).
3.2.10 INTEGER OVERFLOW OR WRAPAROUND CWE-190
In Expat (aka libexpat) before 2.4.5, there is an integer overflow in
storeRawNames
CVE-2022-25315 has been assigned to this vulnerability. A CVSS v3 base score of
9.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:H/I:H/A:H ).
3.2.11 IMPROPER ENCODING OR ESCAPING OF OUTPUT CWE-116
Vulnerable code in xmltok_impl.c in Expat (aka libexpat) before 2.4.5 lacks
certain validation of encoding, such as checks for whether a UTF-8 character is
valid in a certain context.
CVE-2022-25235 has been assigned to this vulnerability. A CVSS v3 base score of
9.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:H/I:H/A:H ).
3.2.12 EXPOSURE OF RESOURCE TO WRONG SPHERE CWE-668
Vulnerable code in xmlparse.c in Expat (aka libexpat) before 2.4.5 allows
attackers to insert namespace-separator characters into namespace URIs.
CVE-2022-25236 has been assigned to this vulnerability. A CVSS v3 base score of
9.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:H/I:H/A:H ).
3.2.13 INTEGER OVERFLOW OR WRAPAROUND CWE-190
Expat (aka libexpat) before 2.4.4 has a signed integer overflow in
XML_GetBuffer, for configurations with a nonzero XML_CONTEXT_BYTES
CVE-2022-23852 has been assigned to this vulnerability. A CVSS v3 base score of
9.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:H/I:H/A:H ).
3.2.14 INTEGER OVERFLOW OR WRAPAROUND CWE-190
Expat (aka libexpat) before 2.4.4 has an integer overflow in the doProlog
function.
CVE-2022-23990 has been assigned to this vulnerability. A CVSS v3 base score of
7.5 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:N/I:N/A:H ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Energy
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Switzerland
3.4 RESEARCHER
Hitachi Energy reported these vulnerabilities to CISA.
4. MITIGATIONS
Hitachi energy recommends the following actions:
o AFF66X FW 03.0.02 and earlier:
? For all vulnerabilities, apply mitigation strategy as described in
Hitachi Energy's general mitigation factors below or update to upcoming
AFF66X 04.x.xx FW when released.
o AFS66X-S, AFS660-C, AFS66X-B, AFS670-V20 devices:
? For all vulnerabilities, apply mitigation strategy as described in
Hitachi Energy's general mitigation factors below or update to upcoming
AFS66X, AFS670-V20 7.1.08 FW when released.
? Disable HTTP/HTTPS server or restrict access to HTTP/HTTPS to trusted
IP addresses.
? Disable IEC61850-MMS server or restrict access to IEC61850-MMS to
trusted IP addresses.
o AFS65X, AFS67X, AFR677 devices:
? For all vulnerabilities, apply mitigation strategy as described in
Hitachi Energy's general mitigation factors below or update to AFS65X,
AFS67X, AFR677 09.1.08 FW.
? Disable HTTP/HTTPS server or restrict access to HTTP/HTTPS to trusted
IP addresses.
? Disable IEC61850-MMS server.
Hitachi Energy's general mitigation factors:
Security practices and firewall configurations can help protect a process
control network from attacks that originate from outside the network. Such
practices include that process control systems are physically protected from
direct access by unauthorized personnel, have no direct connections to the
Internet, and are separated from other networks by means of a firewall system
that has a minimal number of ports exposed, and others that have to be
evaluated case by case. Process control systems should not be used for Internet
surfing, instant messaging, or receiving e-mails. Portable computers and
removable storage media should be carefully scanned for viruses before they are
connected to a control system.
For more information, please visit Hitachi Energy's Advisory .
CISA recommends users take defensive measures to minimize the risk of
exploitation of these vulnerabilities. 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:
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 October 5, 2023: Initial Publication
This product is provided subject to this Notification and this Privacy & Use
policy.
Vendor
Hitachi Energy
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