CVE-2017-1000230 — HIGH (7.5)

Vulnerability 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.

CVSS Score

7.5

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Snap7 Project	Snap7 Server	1.4.1

Related Weaknesses (CWE)

CWE-20

References

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

FAQ

What is CVE-2017-1000230?

CVE-2017-1000230 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 resultin...

How severe is CVE-2017-1000230?

CVE-2017-1000230 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2017-1000230?

Check the references section above for vendor advisories and patch information. Affected products include: Snap7 Project Snap7 Server.