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
Published Dec 31, 2017
7.4
HIGHCVSS 3.0
EPSS 1.00%
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.
Affected products
No data.
- ≤ 6.5.2.20569
Running on/with
- n/a
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
AV:N/AC:M/Au:N/C:N/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.00% (0.00999) | 61.41th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.00% (0.00999) | 61.25th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.11% (0.00112) | 44.98th | v3 (v2023.03.01) |
| Nov 9, 2023 | 0.11% (0.00112) | 44.30th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.10% (0.00103) | 40.66th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.42% (0.00416) | 10.04th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.42% (0.00416) | 0.00th | v1 |
References (1)
- https://systemoverlord.com/2017/12/18/cve-2017-17704-broken-cryptography-in-istar-ultra-ip-acm-by-software-house.html x_refsource_MISCThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://systemoverlord.com/2017/12/18/cve-2017-17704-broken-cryptography-in-istar-ultra-ip-acm-by-software-house.html | x_refsource_MISCThird Party Advisory |
Change history (0)
No recorded changes yet.