CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
Low
EPSS
Percentile
54.1%
Successful exploitation of these vulnerabilities may allow an attacker unauthorized access to the web interface, improper access to privileged user and device information, and may allow successful CSRF attacks.
The following versions of SINEMA Remote Connect Server are affected:
The web interface has no means to prevent password guessing attacks. This vulnerability could be exploited by an attacker with network access to the vulnerable software, requiring no privileges and no user interaction. Exploitation could allow full access to the web interface.
CVE-2019-13918 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).
Some pages that should only be accessible by a privileged user can also be accessed by a nonprivileged user. This vulnerability could be exploited by an attacker with network access and valid credentials for the web interface. No user interaction is required. Exploitation could allow an attacker to access information they should not be able to read. The information affected by this vulnerability does not include passwords.
CVE-2019-13919 has been assigned to this vulnerability. A CVSS v3 base score of 4.3 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N).
Some parts of the web application are not protected against cross-site request forgery (CSRF) attacks. This vulnerability could be exploited by an attacker who is able to trigger requests of a logged-in user to the application. Exploitation could allow switching the connectivity state of a user or a device.
CVE-2019-13920 has been assigned to this vulnerability. A CVSS v3 base score of 3.4 has been calculated; the CVSS vector string is (AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:L/A:N).
An attacker with administrative privileges can obtain the hash of a connected deviceβs password. The security vulnerability could be exploited by an attacker with network access to the SINEMA Remote Connect Server and administrative privileges.
CVE-2019-13922 has been assigned to this vulnerability. A CVSS v3 base score of 6.6 has been calculated; the CVSS vector string is (AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:H).
Hendrik Derre and Tijl Deneut from HOWEST reported these vulnerabilities to Siemens.
Siemens recommends users upgrade to Versions 2.0 SP1 or later for the affected products.
The v2.0 SP1 update can be obtained at the following location:
<https://support.industry.siemens.com/cs/ww/en/view/109770899>
For more information on these vulnerabilities and associated software updates, please see Siemensβ security advisory SSA-884497 at: <https://www.siemens.com/cert/advisories>.
Siemens has identified the following specific workarounds and mitigations users can apply to reduce the risk:
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 on us-cert.gov. 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 webpage on us-cert.gov 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 CISA for tracking and correlation against other incidents.
No known public exploits specifically target these vulnerabilities. High skill level is needed to exploit.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-13918
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-13919
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-13920
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-13922
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cwe.mitre.org/data/definitions/200.html
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cwe.mitre.org/data/definitions/916.html
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support.industry.siemens.com/cs/ww/en/view/109770899
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CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
Low
EPSS
Percentile
54.1%