Vulnerability in SMA Solar Technology's Grid Guard Authentication System
CVE-2017-9855

9.8CRITICAL

Key Information:

Vendor

Sma

Status
Sunny Boy 3600 Firmware
Vendor
CVE Published:
5 August 2017

What is CVE-2017-9855?

An authentication issue was identified in SMA Solar Technology’s Grid Guard system, which is intended for tracing rather than robust security. This system uses easily predictable codes that, when paired with an installer account, can enable unauthorized users to alter sensitive operational parameters on designated SMA inverters. While the vendor clarifies that Grid Guard does not serve as a genuine authentication measure, the implications of its predictable coding system pose potential security risks. Affected models include Sunny Boy TLST-21, TL-21, and Sunny Tripower TL-10 and TL-30.

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References

http://www.sma.de/en/statement-on-cyber-security.html
x_refsource_MISC
https://horusscenario.com/CVE-information/
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http://www.sma.de/fileadmin/content/global/specials/docum...
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CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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