5.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
0.0005 Low
EPSS
Percentile
18.2%
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 the vulnerability could allow an attacker to retrieve sensitive information.
The following software from Siemens is affected:
3.2.1 OBSERVABLE RESPONSE DISCREPANCY CWE-204
The affected versions of the module contain an observable response discrepancy issue that could allow an attacker to retrieve sensitive information.
CVE-2023-27464 has been assigned to this vulnerability. A CVSS v3 base score of 5.3 has been calculated; the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).
Siemens reported this vulnerability to CISA.
Siemens has released updates for the affected products and recommends users update to the latest versions:
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 configuring the environment according to Siemens’ operational guidelines for industrial security, and to follow the recommendations in the product manuals. Additional information on industrial security by Siemens can be found at the Siemens Industrial Security web page.
For further inquiries on security vulnerabilities in Siemens products and solutions, users should contact the Siemens ProductCERT.
For more information see the associated Siemens security advisory SSA-699404 in HTML and CSAF.
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability 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 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.
CISA also recommends users take the following measures to protect themselves from social engineering attacks:
No known public exploits specifically target this vulnerability.
cert-portal.siemens.com/productcert/csaf/ssa-699404.json
cert-portal.siemens.com/productcert/html/ssa-699404.html
cisa.gov/ics
cisa.gov/ics
cwe.mitre.org/data/definitions/204.html
marketplace.mendix.com/link/component/1296
marketplace.mendix.com/link/component/1296
marketplace.mendix.com/link/component/1296
nvd.nist.gov/vuln/detail/CVE-2023-27464
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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
www.cisa.gov/uscert/ncas/tips/ST04-014
www.cisa.gov/uscert/sites/default/files/publications/emailscams_0905.pdf
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