CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
AI Score
Confidence
Low
EPSS
Percentile
77.9%
This updated advisory is a follow-up to the advisory titled ICSA-15-181-02 SMA Solar Technology AG Sunny WebBox Hard-Coded Account Vulnerability that was published September 3, 2015, on the NCCIC/ICS-CERT web site.
Aleksandr Timorin of PT Security has identified a hard-coded account vulnerability in SMA Solar Technology AGβs Sunny WebBox product. SMA is planning to discontinue the sale of this product, and there is no plan to fix old versions. They have reached out to WebBox users with compensating security recommendations.
This vulnerability could be exploited remotely.
The following Sunny WebBox versions are affected:
A remote attacker could exploit this vulnerability to gain full access to the system.
Impact to individual organizations depends on many factors that are unique to each organization. ICS-CERT recommends that organizations evaluate the impact of this vulnerability based on their operational environment, architecture, and product implementation.
SMA Solar Technology AG is a German solar energy equipment supplier.
The affected product, Sunny WebBox, is used for remote monitoring and maintenance of medium-sized photovoltaic plants. According to SMA, Sunny WebBox devices are deployed in the Energy sector. SMA estimates that this product is used worldwide.
Sunny WebBox can be accessed using hard-coded passwords that cannot be changed or disabled by a user.
CVE-2015-3964NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-3964, web site last accessed September 17, 2015. has been assigned to this vulnerability. A CVSS v2 base score of 10.0 has been assigned; the CVSS vector string is (AV:N/AC:L/Au:N/C:C/I:C/A:C).CVSS Calculator, http://nvd.nist.gov/cvss.cfm?version=2&vector=AV:N/AC:L/Au:N/C:C/I:C/A:C, web site last accessed June 30, 2015.
This vulnerability could be exploited remotely.
No known public exploits specifically target this vulnerability.
An attacker with a low skill would be able to exploit this vulnerability.
SMA Solar Technology AG has sent out security recommendations via its Sunny Portal Online Platform to WebBox users. SMA expressly recommends deactivation of port-forwarding or use of a VPN to access these devices remotely. Please refer to the Sunny Portal Online Platform or contact SMA customer service for more information:
Phone: 1-888-4SMAUSA
Email: [email protected]
Web: www.SMA-America.com
ICS-CERT recommends that users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should:
ICS-CERT reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
ICS-CERT also provides a section for control systems security recommended practices on the ICS-CERT web page at http://ics-cert.us-cert.gov/content/recommended-practices. 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 in the ICSβCERT Technical Information Paper, ICS-TIP-12-146-01BβTargeted Cyber Intrusion Detection and Mitigation Strategies, that is available for download from the ICS-CERT web site (www.ics-cert.org).
Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to ICS-CERT for tracking and correlation against other incidents.
www.SMA-America.com
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