6.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
8.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
0.056 Low
EPSS
Percentile
93.3%
CVSS v3 8.1
ATTENTION: Exploitable remotely
Vendor: Siemens
Equipment: Siveillance Video Management Software (VMS)
Vulnerability: Deserialization of Untrusted Data
This updated advisory is a follow-up to the original advisory titled ICSA-18-128-02 Siemens Siveillance VMS that was published May 8, 2018, on the NCCIC/ICS-CERT website.
Successful exploitation of this vulnerability by the affected ports in .NET Remoting deserialization could allow elevation of privileges and/or cause a denial-of-service.
The following versions of Siveillance VMS, an IP video management software, are affected:
The Recording Server, Management Server, and Management Client on Ports 6473/TCP local connection only, 7474/TCP, 8966/TCP local connection only, and Port 9993/TCP use an exploitable .NET Framework Remoting deserialization level.
An attacker could exploit this vulnerability by accessing the vulnerable ports, allowing elevation of privileges or causing a denial-of-service; compromising confidentiality, integrity, and availability of the targeted system.
CVE-2018-7891 has been assigned to this vulnerability. A CVSS v3 base score of 8.1 has been calculated; the CVSS vector string is (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H).
Siemens ProductCERT reported this vulnerability to NCCIC.
Siemens has released updates for several affected products and recommends users update to the new version.
--------- Begin Update A Part 1 of 1 --------
Contact Siveillance Technical Support at: [email protected]
--------- End Update A Part 1 of 1 ----------
As a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. In order to run the devices in a protected IT environment, Siemens specifically recommends users configure the environment according to Siemensβ Operational Guidelines for Industrial Security and follow the recommendations in the product manuals.
Additional information on industrial security by Siemens can be found at:
<https://www.siemens.com/industrialsecurity>
For more information on this vulnerability and associated software updates, please see Siemens security advisory SSA-457058 on their website:
<https://www.siemens.com/cert/advisories>:
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.
No known public exploits specifically target this vulnerability. High skill level is needed to exploit.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-7891
cwe.mitre.org/data/definitions/502.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
twitter.com/intent/tweet?text=Siemens%20Siveillance%20VMS%20%28Update%20A%29+https://www.cisa.gov/news-events/ics-advisories/icsa-18-128-02
www.dhs.gov
www.dhs.gov/foia
www.dhs.gov/performance-financial-reports
www.facebook.com/CISA
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www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
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www.oig.dhs.gov/
www.siemens.com/cert/advisories
www.siemens.com/content/dam/webassetpool/mam/tag-siemens-com/smdb/digital-factory/industrial-security/online/documents/whitepapers/en/operational-guidelines-industrial-security-en.pdf
www.siemens.com/industrialsecurity
www.surveymonkey.com/r/CISA-cyber-survey?product=https://www.cisa.gov/news-events/ics-advisories/icsa-18-128-02
www.usa.gov/
www.whitehouse.gov/
www.youtube.com/@cisagov
mailto:?subject=Siemens%20Siveillance%20VMS%20%28Update%20A%29&body=www.cisa.gov/news-events/ics-advisories/icsa-18-128-02
6.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
8.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
0.056 Low
EPSS
Percentile
93.3%