CVE-2017-17704

Name: CVE-2017-17704
Creator: NVD / NIST
Published: 2017-12-31T02:29:01.55+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.99%

Last modified Jun 17, 2026

CVE-2017-17704 is a vulnerability of currently unknown severity. A door-unlocking issue was discovered on Software House iStar Ultra devices through 6.5.2.20569 when used in conjunction with the IP-ACM Ethernet Door Module. The communications between the IP-ACM and the iStar Ultra is encrypted using a fixed AES key and IV. EPSS estimates a 0.99% chance of exploitation in the next 30 days.

Description

A door-unlocking issue was discovered on Software House iStar Ultra devices through 6.5.2.20569 when used in conjunction with the IP-ACM Ethernet Door Module. The communications between the IP-ACM and the iStar Ultra is encrypted using a fixed AES key and IV. Each message is encrypted in CBC mode and restarts with the fixed IV, leading to replay attacks of entire messages. There is no authentication of messages beyond the use of the fixed AES key, so message forgery is also possible.

Metrics

EPSS Probability

0.99%

58.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-330

Affected Software

Vendor	Product	Versions
Swhouse	Istar Ultra Firmware	<= 6.5.2.20569

References

Timeline

Published: Dec 31, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-17704?

How severe is CVE-2017-17704?

Severity scoring for CVE-2017-17704 is pending analysis. The EPSS model estimates a 0.99% probability of exploitation in the next 30 days.

How do I fix CVE-2017-17704?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-17704?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST