7.3 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
LOW
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L
0.001 Low
EPSS
Percentile
20.2%
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 Siemensβ ProductCERT Security Advisories (CERT Services | Services | Siemens Global).
Successful exploitation of this vulnerability could allow an attacker to achieve arbitrary code execution.
The following software from Siemens is affected:
3.2.1 IMPROPER INPUT VALIDATION CWE-20
Affected products contain a path traversal vulnerability that could allow the creation or overwriting of arbitrary files in the engineering system. If the user is tricked into opening a malicious PC system configuration file, an attacker could exploit this vulnerability to achieve arbitrary code execution.
CVE-2023-26293 has been assigned to this vulnerability. A CVSS v3 base score of 7.3 has been calculated; the CVSS vector string is (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L).
Siemens reported this vulnerability to CISA.
Siemens has released an update for TIA Portal V18 and recommends updating to the latest version. Siemens is preparing further updates and recommends specific 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 configuring the environment according to Siemensβ operational guidelines for industrial security and following 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 Siemensβ products and solutions, users should contact the Siemens ProductCERT.
For more information, see the associated Siemens security advisory SSA-116924 in HTML and CSAF.
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability.
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-12-146-01BβTargeted 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-116924.json
cert-portal.siemens.com/productcert/html/ssa-116924.html
cisa.gov/ics
cisa.gov/ics
cwe.mitre.org/data/definitions/20.html
nvd.nist.gov/vuln/detail/CVE-2023-26293
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
support.industry.siemens.com/cs/ww/en/view/109817218/
twitter.com/CISAgov
twitter.com/intent/tweet?text=Siemens%20Path%20Traversal%20TIA%20Portal+https://www.cisa.gov/news-events/ics-advisories/icsa-23-103-04
us-cert.cisa.gov/ics/Recommended-Practices
us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
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
www.dhs.gov
www.dhs.gov/foia
www.dhs.gov/performance-financial-reports
www.facebook.com/CISA
www.facebook.com/sharer/sharer.php?u=https://www.cisa.gov/news-events/ics-advisories/icsa-23-103-04&title=Siemens%20Path%20Traversal%20TIA%20Portal
www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L
www.instagram.com/cisagov
www.linkedin.com/company/cybersecurity-and-infrastructure-security-agency
www.linkedin.com/sharing/share-offsite/?url=https://www.cisa.gov/news-events/ics-advisories/icsa-23-103-04
www.oig.dhs.gov/
www.siemens.com/cert/advisories
www.siemens.com/cert/operational-guidelines-industrial-security
www.siemens.com/industrialsecurity
www.surveymonkey.com/r/CISA-cyber-survey?product=https://www.cisa.gov/news-events/ics-advisories/icsa-23-103-04
www.usa.gov/
www.whitehouse.gov/
www.youtube.com/@cisagov
mailto:?subject=Siemens%20Path%20Traversal%20TIA%20Portal&body=www.cisa.gov/news-events/ics-advisories/icsa-23-103-04