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This updated advisory is a follow-up to the advisory update titled ICSA-19-043-03 Siemens Licensing Software for SICAM 230 (Update A) that was published February 14, 2019, on the NCCIC/ICS-CERT website.
Successful exploitation of these vulnerabilities may allow information disclosure, privilege escalation, or remote code execution.
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The following products are affected by vulnerabilities in WibuKey Digital Rights Management (DRM):
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4.2.1 INFORMATION EXPOSURE CWE-200
A specially crafted IRP (I/O request packet) can cause the driver to return uninitialized memory, which may result in kernel memory disclosure.
CVE-2018-3989 has been assigned to this vulnerability. A CVSS v3 base score of 4.3 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N).
4.2.2 OUT-OF-BOUNDS WRITE CWE-787
A specially crafted IRP (I/O request packet) can cause a buffer overflow resulting in kernel memory corruption, which may allow privilege escalation.
CVE-2018-3990 has been assigned to this vulnerability. A CVSS v3 base score of 9.3 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H).
4.2.3 HEAP-BASED BUFFER OVERFLOW CWE-122
A specially crafted TCP packet sent to Port 22347/TCP can cause a heap overflow, which may lead to remote code execution.
CVE-2018-3991 has been assigned to this vulnerability. A CVSS v3 base score of 10.0 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H).
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\Siemens and BSI Germany reported these vulnerabilities to NCCIC.
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Updated Wibu Systems Software can be found at the following link:
https://www.wibu.com/support/user/downloads-user-software.html
Siemens recommends users upgrade to WibuKey DRM Version 6.50 or newer for all affected Siemens products. Siemens also recommends mitigating CVE-2018-3991 by blocking Port 22347/TCP. For detailed information, see Siemens security advisories SSA-760124 and SSA-844562 at the following link:
<http://www.siemens.com/cert/en/cert-security-advisories.htm>
COPA-DATA recommends users upgrade WibuKey DRM to Version 6.50a or newer, restrict physical and network access, segment network traffic, ensure systems using WibuKey WkLAN Server are not external facing, and apply application whitelisting. For detailed information, see COPA_DATAβs security advisory at the following link:
<https://www.copadata.com/fileadmin/user_upload/faq/files/CD_SVA_2019_1.pdf>
Sprecher Automation recommends users upgrade WibuKey DRM to Version 6.50b or newer, restrict physical and network access, segment network traffic, ensure systems using WibuKey WkLAN Server are not external facing, and apply application whitelisting. For detailed information, see Sprecher Automationβs security advisory at the following link:
Phoenix Contact has calculated different CVSS vectors from those in the Vulnerability Overview section. See the Phoenix Contact or CERT@VDE advisory for details.
Phoenix Contact recommends those using dongle-based licensing to update to WibuKey Version 6.50 or newer. MEVIEW3 Versions 3.14.25 and 3.15.18 will include Version 6.50 of WibuKey. For those using hardware code-based licensing, Phoenix Contact recommends removing the WibuKey application. For detailed information, the Phoenix Contact MEVIEW3 security advisory can be found at the following link:
<https://www.phoenixcontact.com/psirt>
CERT@VDE has also published an advisory for the Phoenix Contact MEVIEW3 at the following link:
https://cert.vde.com/de-de/advisories/vde-2019-003
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NCCIC recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:
NCCIC reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
NCCIC also provides a section for control systems security recommended practices on the ICS-CERT web page. 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-CERT website in the Technical Information Paper, ICS-TIP-12-146-01BβTargeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to NCCIC for tracking and correlation against other incidents.
NCCIC also recommends that users take the following measures to protect themselves from social engineering attacks:
ics-cert.us-cert.gov
ics-cert.us-cert.gov
twitter.com/icscert
twitter.com/icscert
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-3989
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-3990
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-3991
www.addthis.com/bookmark.php?url=https%3A%2F%2Fics-cert.us-cert.gov%2Fadvisories%2FICSA-19-043-03-0
www.dhs.gov
www.dhs.gov/report-cyber-risks
www.siemens.com/cert/en/cert-security-advisories.htm
www.us-cert.gov/accessibility/
www.us-cert.gov/pdf/
www.us-cert.gov/privacy/
www.us-cert.gov/tlp/
www.us-cert.gov/tlp/
cwe.mitre.org/data/definitions/122.html
cwe.mitre.org/data/definitions/200.html
cwe.mitre.org/data/definitions/787.html
ics-cert.us-cert.gov/
ics-cert.us-cert.gov/alerts/ICS-ALERT-10-301-01
ics-cert.us-cert.gov/content/recommended-practices
ics-cert.us-cert.gov/Report-Incident?
ics-cert.us-cert.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
ics-cert.us-cert.gov/tips/ICS-TIP-12-146-01B
twitter.com/share?url=https%3A%2F%2Fics-cert.us-cert.gov%2Fadvisories%2FICSA-19-043-03-0
www.copadata.com/fileadmin/user_upload/faq/files/CD_SVA_2019_1.pdf
www.facebook.com/sharer.php?u=https%3A%2F%2Fics-cert.us-cert.gov%2Fadvisories%2FICSA-19-043-03-0
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
www.phoenixcontact.com/psirt
www.phoenixcontact.com/psirt
www.sprecher-automation.com/fileadmin/kundendaten/teaser/News/2018/SPRECON-V460_Security_Vulnerability_Announcement_2019-01_Issue_1.pdf
www.us-cert.gov/forms/feedback?helpful=no&document=ICSA-19-043-03 WIBU SYSTEMS AG WibuKey Digital Rights Management (Update B)&trackingNumber=&url=https://ics-cert.us-cert.gov/advisories/ICSA-19-043-03-0&site_name=ICS-CERT
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