CVE-2017-9856 Vulnerability Analysis & Exploit Details

CVE-2017-9856
Vulnerability Scoring

3.4
/10
Moderate Risk

Exploiting CVE-2017-9856 requires specific conditions, leading to a moderate security impact.

Attack Complexity Details

  • Attack Complexity: High
    Exploits require significant effort and special conditions.
  • Attack Vector: Network
    Vulnerability is exploitable over a network without physical access.
  • Privileges Required: None
    No privileges are required for exploitation.
  • Scope: Changed
    Successful exploitation can impact components beyond the vulnerable component.
  • User Interaction: Required
    User interaction is necessary for successful exploitation.

CVE-2017-9856 Details

Status: Deferred

Last updated: 🕜 20 Apr 2025, 01:37 UTC
Originally published on: 🕔 05 Aug 2017, 17:29 UTC

Time between publication and last update: 2814 days

CVSS Release: version 3

CVSS3 Source

134c704f-9b21-4f2e-91b3-4a467353bcc0

CVSS3 Type

Secondary

CVSS3 Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N

CVE-2017-9856 Vulnerability Summary

CVE-2017-9856: An issue was discovered in SMA Solar Technology products. Sniffed passwords from SMAdata2+ communication can be decrypted very easily. The passwords are "encrypted" using a very simple encryption algorithm. This enables an attacker to find the plaintext passwords and authenticate to the device. NOTE: the vendor reports that only Sunny Boy TLST-21 and TL-21 and Sunny Tripower TL-10 and TL-30 could potentially be affected

Assessing the Risk of CVE-2017-9856

Access Complexity Graph

The exploitability of CVE-2017-9856 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2017-9856

CVE-2017-9856 presents a challenge to exploit due to its high attack complexity, but the absence of privilege requirements still makes it a viable target for skilled attackers. A thorough security review is advised.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2017-9856, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2017-9856, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: Low
    CVE-2017-9856 could lead to minor leaks of non-critical information without major privacy breaches.
  • Integrity: None
    CVE-2017-9856 poses no threat to data integrity.
  • Availability: None
    CVE-2017-9856 does not impact system availability.

Exploit Prediction Scoring System (EPSS)

The EPSS score estimates the probability that this vulnerability will be exploited in the near future.

EPSS Score: 0.246% (probability of exploit)

EPSS Percentile: 64.5% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 35.5% of others.

CVE-2017-9856 References

External References

CWE Common Weakness Enumeration

CWE-256

Vulnerable Configurations

  • cpe:2.3:o:sma:sunny_boy_3600_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_boy_3600_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_boy_3600:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_boy_3600:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_boy_5000_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_boy_5000_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_boy_5000:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_boy_5000:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_tripower_core1_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_tripower_core1_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_tripower_core1:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_tripower_core1:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_tripower_15000tl_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_tripower_15000tl_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_tripower_15000tl:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_tripower_15000tl:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_tripower_20000tl_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_tripower_20000tl_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_tripower_20000tl:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_tripower_20000tl:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_tripower_25000tl_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_tripower_25000tl_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_tripower_25000tl:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_tripower_25000tl:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_tripower_5000tl_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_tripower_5000tl_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_tripower_5000tl:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_tripower_5000tl:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_tripower_12000tl_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_tripower_12000tl_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_tripower_12000tl:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_tripower_12000tl:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_tripower_60_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_tripower_60_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_tripower_60:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_tripower_60:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_boy_3000tl_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_boy_3000tl_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_boy_3000tl:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_boy_3000tl:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_boy_3600tl_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_boy_3600tl_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_boy_3600tl:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_boy_3600tl:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_boy_4000tl_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_boy_4000tl_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_boy_4000tl:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_boy_4000tl:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_boy_5000tl_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_boy_5000tl_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_boy_5000tl:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_boy_5000tl:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_boy_1.5_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_boy_1.5_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_boy_1.5:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_boy_1.5:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_boy_2.5_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_boy_2.5_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_boy_2.5:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_boy_2.5:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_boy_3.0_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_boy_3.0_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_boy_3.0:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_boy_3.0:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_boy_3.6_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_boy_3.6_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_boy_3.6:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_boy_3.6:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_boy_4.0_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_boy_4.0_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_boy_4.0:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_boy_4.0:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_boy_5.0_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_boy_5.0_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_boy_5.0:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_boy_5.0:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_central_2200_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_central_2200_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_central_2200:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_central_2200:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_central_1000cp_xt_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_central_1000cp_xt_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_central_1000cp_xt:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_central_1000cp_xt:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_central_800cp_xt_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_central_800cp_xt_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_central_800cp_xt:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_central_800cp_xt:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_central_850cp_xt_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_central_850cp_xt_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_central_850cp_xt:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_central_850cp_xt:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_central_900cp_xt_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_central_900cp_xt_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_central_900cp_xt:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_central_900cp_xt:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_central_500cp_xt_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_central_500cp_xt_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_central_500cp_xt:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_central_500cp_xt:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_central_630cp_xt_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_central_630cp_xt_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_central_630cp_xt:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_central_630cp_xt:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_central_720cp_xt_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_central_720cp_xt_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_central_720cp_xt:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_central_720cp_xt:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_central_760cp_xt_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_central_760cp_xt_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_central_760cp_xt:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_central_760cp_xt:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_central_storage_500_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_central_storage_500_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_central_storage_500:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_central_storage_500:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_central_storage_630_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_central_storage_630_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_central_storage_630:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_central_storage_630:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_central_storage_720_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_central_storage_720_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_central_storage_720:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_central_storage_720:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_central_storage_760_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_central_storage_760_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_central_storage_760:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_central_storage_760:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_central_storage_800_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_central_storage_800_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_central_storage_800:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_central_storage_800:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_central_storage_850_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_central_storage_850_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_central_storage_850:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_central_storage_850:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_central_storage_900_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_central_storage_900_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_central_storage_900:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_central_storage_900:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_central_storage_1000_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_central_storage_1000_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_central_storage_1000:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_central_storage_1000:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_central_storage_2200_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_central_storage_2200_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_central_storage_2200:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_central_storage_2200:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_central_storage_2500-ev_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_central_storage_2500-ev_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_central_storage_2500-ev:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_central_storage_2500-ev:-:*:*:*:*:*:*:*
  • cpe:2.3:o:sma:sunny_boy_storage_2.5_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:sma:sunny_boy_storage_2.5_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:sma:sunny_boy_storage_2.5:-:*:*:*:*:*:*:*
    cpe:2.3:h:sma:sunny_boy_storage_2.5:-:*:*:*:*:*:*:*

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