CVSS 3.0
7.4 highCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:HCVE-2017-17704
High (7.4) in swhouse istar ultra firmware. EPSS 1.0% chance of exploitation in the next 30 days.
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.
Severity
- EPSS
- 1.0% chance of exploitation in the next 30 days; higher than 62% of CVEs (scores of 2026-10-31)
- CWE
- CWE-330
- Published
- Modified
- Record from
- the NVD, synced
Affected
- swhouse:istar_ultra_firmware