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CVE-2017-17704

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…

High7.4EPSS 0.99%
Published
Updated
Reserved
Assigned by
mitre

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.

Scores

CVSS scores of CVE-2017-17704, by who scored it
Scored byCVSSScoreVector
NVDNVD · Modified3.0High7.4CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
EPSS (exploitation in 30 days)
0.99% · top 37% of all CVEs (4 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.4.

Weakness

Affected products

  • n/a

    • affected n/a

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .