How severe is CVE-2017-1000230?

CVE-2017-1000230 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2017-1000230 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-1000230?

CVE-2017-1000230 affects Snap7 Project Snap7 Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-1000230?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2017-1000230 published?

CVE-2017-1000230 was published on 2017-11-17 and last updated on 2026-06-17.

CVE-2017-1000230

CVE-2017-1000230 is a high-severity vulnerability in Snap7 Project Snap7 Server with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Snap7 Project Snap7 Server
Published: 2017-11-17
Last modified: 2026-06-17

Description

The Snap7 Server version 1.4.1 can be crashed when the ItemCount field of the ReadVar or WriteVar functions of the S7 protocol implementation in Snap7 are provided with unexpected input, thus resulting in denial of service attack.

Frequently asked questions

What is CVE-2017-1000230?: The Snap7 Server version 1.4.1 can be crashed when the ItemCount field of the ReadVar or WriteVar functions of the S7 protocol implementation in Snap7 are provided with unexpected input, thus resulting in denial of service attack.
How severe is CVE-2017-1000230?: CVE-2017-1000230 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2017-1000230 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-1000230?: CVE-2017-1000230 affects Snap7 Project Snap7 Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-1000230?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2017-1000230 published?: CVE-2017-1000230 was published on 2017-11-17 and last updated on 2026-06-17.

References

https://sourceforge.net/p/snap7/discussion/bugfix/thread/2d2d085c/

Affected products (1)

cpe:2.3:a:snap7_project:snap7_server:1.4.1:*:*:*:*:*:*:*

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