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CRITICAL

CVE-2017-9855

CVE-2017-9855 Vulnerability Analysis & Exploit Intelligence

An issue was discovered in SMA Solar Technology products. A secondary authentication system is available for Installers called the Grid Guard system. This system uses predictable codes, and a single Grid Guard code can be used on any SMA inverter. Any such code, when combined with the installer account, allows changing very sensitive parameters. NOTE: the vendor reports that Grid Guard is not an authentication feature; it is only a tracing feature. Also, only Sunny Boy TLST-21 and TL-21 and Sunny Tripower TL-10 and TL-30 could potentially be affected

Published Updated Sources: cvelistV5, mitre

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the scoring sources call it.

Exploitation

Unreported

no source claims exploitation

EPSS

2%

chance of exploitation in 30 days

Affects

sma

39 products listed

CVSS base

9.8

CRITICAL

CISA SSVC assessment

Three decision points CISA publishes for the CVEs it assesses · SSVC 2.0.3. A stakeholder decision, not a severity score.

CISA

Exploitation

None

none · proof-of-concept · active

Automatable

No

can an attacker script all four kill-chain steps

Technical impact

Total

partial · total control of the vulnerable component

Affected scope

The catalog records vendors and products as separate lists, not pairs, so which product belongs to which vendor is not something this page can say.

Vendors (1)

sma

Products (39)

sunny boy 3600 firmwaresunny boy 5000 firmwaresunny tripower core1 firmwaresunny tripower 15000tl firmwaresunny tripower 20000tl firmwaresunny tripower 25000tl firmwaresunny tripower 5000tl firmwaresunny tripower 12000tl firmwaresunny tripower 60 firmwaresunny boy 3000tl firmwaresunny boy 3600tl firmwaresunny boy 4000tl firmwaresunny boy 5000tl firmwaresunny boy 1 5 firmwaresunny boy 2 5 firmwaresunny boy 3 0 firmwaresunny boy 3 6 firmwaresunny boy 4 0 firmwaresunny boy 5 0 firmwaresunny central 2200 firmwaresunny central 1000cp xt firmwaresunny central 800cp xt firmwaresunny central 850cp xt firmwaresunny central 900cp xt firmwaresunny central 500cp xt firmwaresunny central 630cp xt firmwaresunny central 720cp xt firmwaresunny central 760cp xt firmwaresunny central storage 500 firmwaresunny central storage 630 firmwaresunny central storage 720 firmwaresunny central storage 760 firmwaresunny central storage 800 firmwaresunny central storage 850 firmwaresunny central storage 900 firmwaresunny central storage 1000 firmwaresunny central storage 2200 firmwaresunny central storage 2500 ev firmwaresunny boy storage 2 5 firmware

Every base score collected

Sources score independently and disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactSource
9.8CVSS 3.1CRITICAL——cvelistV5

Weakness & attack patterns

  • CWE-863

References

3 on the record

Elsewhere on this site

  • smaevery CVE for this vendor
  • CWE-863other pages naming this weakness

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.