# ICS Advisory (ICSA-19-192-04)
## Siemens SIMATIC RF6XXR
Original release date: July 11, 2019
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* * *
## 1\. EXECUTIVE SUMMARY
* **CVSS v3 5.9**
* **ATTENTION** : Exploitable remotely/public exploits are available
* **Vendor** : Siemens
* **Equipment** : SIMATIC RF6XXR
* **Vulnerabilities** : Improper Input Validation, Cryptographic Issues
## 2\. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow access to
sensitive information.
## 3\. TECHNICAL DETAILS
### 3.1 AFFECTED PRODUCTS
Siemens reports that the vulnerabilities affect all versions prior to 3.2.1 of
the following SIMATIC RF6XXR UHF RFID products:
* RF615R
* RF68XR
### 3.2 VULNERABILITY OVERVIEW
**3.2.1 [IMPROPER INPUT VALIDATION
CWE-20](https://cwe.mitre.org/data/definitions/20.html)**
The SSL protocol encrypts data by using CBC mode with chained initialization
vectors, which may allow a man-in-the-middle attack to obtain plaintext HTTP
headers.
[CVE-2011-3389
](http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2011-3389)has been
assigned to this vulnerability. A CVSS v3 base score of 5.9 has been
calculated; the CVSS vector string is
([AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N](https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)).
**3.2.2 [CRYPTOGRAPIC ISSUES
CWE-310](https://cwe.mitre.org/data/definitions/310.html)**
Long-duration TLS sessions used with a 64-bit block cipher may allow remote
attackers to obtain cleartext data.
[CVE-2016-6329
](http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-6329)has been
assigned to this vulnerability. A CVSS v3 base score of 5.9 has been
calculated; the CVSS vector string is
([AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N](https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)).
**3.2.3 [CRYPTOGRAPIC ISSUES
CWE-310](https://cwe.mitre.org/data/definitions/310.html)**
Outdated versions of TLS and DTLS allow statistical analysis of timing data
for crafted packets, which may allow remote attackers to conduct
distinguishing and plaintext-recovery attacks.
[CVE-2013-0169
](http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-0169)has been
assigned to this vulnerability. A CVSS v3 base score of 5.9 has been
calculated; the CVSS vector string is
([AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N](https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)).
### 3.3 BACKGROUND
* **CRITICAL INFRASTRUCTURE SECTORS** : Critical Manufacturing, Food and Agriculture, Transportation Systems
* **COUNTRIES/AREAS DEPLOYED** : Worldwide
* **COMPANY HEADQUARTERS LOCATION** : Germany
### 3.4 RESEARCHER
Wendy Parrington from United Utilities reported these vulnerabilities to
Siemens.
## 4\. MITIGATIONS
Siemens recommends users upgrade to Version 3.2.1 or newer for both affected
products.
Siemens also recommends users restrict network access to the device.
For more information on these vulnerabilities and associated software updates,
please see Siemens' security advisory SSA-556833 at:
[https://www.siemens.com/cert/advisories.](https://www.siemens.com/cert/advisories)
NCCIC recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. Specifically, users should:
* Minimize network exposure for all control system devices and/or systems, and ensure that they are [not accessible from the Internet](https://www.us-cert.gov/ics/alerts/ICS-ALERT-10-301-01).
* Locate control system networks and remote devices behind firewalls, and isolate them from the business network.
* When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing that VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize that VPN is only as secure as the connected devices.
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](https://www.us-cert.gov/ics/recommended-practices) on the [ICS
webpage on us-cert.gov](https://www.us-cert.gov/ics). Several recommended
practices are available for reading and download, including [Improving
Industrial Control Systems Cybersecurity with Defense-in-Depth
Strategies](https://www.us-
cert.gov/sites/default/files/recommended_practices/NCCIC_ICS-
CERT_Defense_in_Depth_2016_S508C.pdf).
Additional mitigation guidance and recommended practices are publicly
available in the Technical Information Paper, [ICS-TIP-12-146-01B--Targeted
Cyber Intrusion Detection and Mitigation Strategies](https://www.us-
cert.gov/ics/tips/ICS-TIP-12-146-01B).
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.
High skill level is needed to exploit.
Unavailable Comments