6.3 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
0.0004 Low
EPSS
Percentile
5.1%
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).
Successful exploitation of this vulnerability could allow a local attacker to decrypt intercepted local traffic between the browser and the application. A local attacker could perform a machine-in-the-middle attack to modify data in transit.
The following software from Siemens is affected:
3.2.1 EXPOSURE OF SENSITIVE INFORMATION TO AN UNAUTHORIZED ACTOR CWE-200
The Adaptec maxView application uses a non-unique TLS certificate across installations to protect communication from the local browser to the local application on affected Siemens devices. A local attacker could use this key to decrypt intercepted local traffic between the browser and the application and could perform a machine-in-the-middle attack to modify data in transit.
CVE-2023-23588 has been assigned to this vulnerability. A CVSS v3 base score of 6.2 has been calculated; the CVSS vector string is (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).
Siemens reported this vulnerability to CISA.
Adaptec has released updates for the affected products and recommends updating to the latest versions. Siemens recommends countermeasures for products where updates are not, or not yet available:
Siemens has identified the following specific workarounds and mitigations users can apply to reduce risk:
As a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. To operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens’ operational guidelines for industrial security and to follow recommendations in the product manuals.
Additional information on industrial security by Siemens can be found here.
For further inquiries on security vulnerabilities in Siemens products and solutions, users should contact Siemens ProductCERT.
For more information, see the associated Siemens security advisory SSA-511182 in HTML and CSAF.
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. 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 at 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.
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.
No known public exploits specifically target this vulnerability. This vulnerability is not exploitable remotely.
cert-portal.siemens.com/productcert/csaf/ssa-511182.json
cert-portal.siemens.com/productcert/html/ssa-511182.html
cisa.gov/ics
cisa.gov/ics
cwe.mitre.org/data/definitions/200.html
nvd.nist.gov/vuln/detail/CVE-2023-23588
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
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us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01
www.cisa.gov/uscert/ics/tips/ICS-TIP-12-146-01B
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