Vulnerability Details 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 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 37.5%
CVSS Severity
CVSS v3 Score 7.4
CVSS v2 Score 5.8
References
Products affected by CVE-2017-17704
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cpe:2.3:h:swhouse:istar_ultra:-
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cpe:2.3:o:swhouse:istar_ultra_firmware:6.5.2.20569