CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
79.0%
This updated advisory is a follow-up to the advisory update titled ICSA-21-315-06 Siemens SCALANCE W1750D that was published November 11, 2022, to the ICS webpage on www.cisa.gov/uscert.
Successful exploitation of these vulnerabilities could allow an attacker to execute code on the affected devices, read arbitrary files, or create a denial-of-service condition.
The following versions of SCALANCE W1750D, a wireless access point, are affected:
--------- Begin Update A part 1 of 3 ---------
--------- End Update A part 1 of 3 ---------
A remote buffer overflow vulnerability was discovered in HPE Aruba Instant (IAP). Successful exploitation could allow for unauthenticated remote code execution, potentially resulting in the execution of arbitrary code as a privileged user on the underlying system.
CVE-2021-37726 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).
A remote arbitrary command execution vulnerability was discovered in HPE Aruba Instant (IAP) command line interface. Successful exploitation could result in the ability to execute arbitrary commands as a privileged user on the underlying OS, potentially compromising the system.
CVE-2021-37727 has been assigned to this vulnerability. A CVSS v3 base score of 7.2 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).
A remote arbitrary command execution vulnerability was discovered in HPE Aruba Instant (IAP) command line interface. Successful exploitation could result in the ability to execute arbitrary commands as a privileged user on the underlying OS, potentially compromising the system.
CVE-2021-37730 has been assigned to this vulnerability. A CVSS v3 base score of 7.2 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).
A remote arbitrary command execution vulnerability was discovered in HPE Aruba Instant (IAP) web-based management user interface. Successful exploitation could result in the ability to execute arbitrary commands as a privileged user on the underlying OS, potentially compromising the system.
CVE-2021-37732 has been assigned to this vulnerability. A CVSS v3 base score of 7.2 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).
An authenticated arbitrary file read access vulnerability was discovered in Aruba Instant Access Points. Successful exploitation could lead to an attacker reading any file off the underlying filesystem, including system sensitive files.
CVE-2021-37734 has been assigned to this vulnerability. A CVSS v3 base score of 4.9 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N).
A remote denial of service vulnerability was discovered in Aruba Instant through the command line interface. Successful exploitation could create a denial-of-service condition, leading to a temporary loss of service until the next reboot.
CVE-2021-37735 has been assigned to this vulnerability. A CVSS v3 base score of 4.9 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).
Siemens reported these vulnerabilities to CISA.
Siemens recommends upgrading their products to the latest version:
--------- Begin Update A part 2 of 3 ---------
--------- End Update A part 2 of 3 ---------
Siemens has identified the following specific workarounds and mitigations users can apply to reduce the risk:
As a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends configuring the environment according to the Siemens operational guidelines for Industrial Security and following the recommendations in the product manuals.
--------- Begin Update A part 3 of 3 ---------
For more information see Siemens Security Advisory SSA-917476 in HTML or CSAF.
--------- End Update A part 3 of 3 ---------
CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should:
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 us-cert.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 us-cert.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.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-37726
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-37727
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-37727
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-37730
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-37730
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-37732
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-37734
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-37734
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-37735
cert-portal.siemens.com/operational-guidelines-industrial-security.pdf
cert-portal.siemens.com/productcert/csaf/ssa-917476.json
cert-portal.siemens.com/productcert/html/ssa-917476.html
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cwe.mitre.org/data/definitions/119.html
cwe.mitre.org/data/definitions/22.html
cwe.mitre.org/data/definitions/22.html
cwe.mitre.org/data/definitions/77.html
cwe.mitre.org/data/definitions/77.html
cwe.mitre.org/data/definitions/77.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
support.industry.siemens.com/cs/de/en/view/109802805
support.industry.siemens.com/cs/ww/en/view/109813747
support.sw.siemens.com/en-US/signin
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us-cert.cisa.gov/ics
us-cert.cisa.gov/ics/alerts/ICS-ALERT-10-301-01
us-cert.cisa.gov/ics/recommended-practices
us-cert.cisa.gov/ics/tips/ICS-TIP-12-146-01B
us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
www.dhs.gov
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CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
79.0%