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.
Products affected by CVE-2017-17704
- cpe:2.3:o:swhouse:istar_ultra_firmware:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2017-17704
0.16%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 33 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2017-17704
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.8
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:P/A:P |
8.6
|
4.9
|
NIST | |
|
7.4
|
HIGH | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H |
2.2
|
5.2
|
NIST |
CWE ids for CVE-2017-17704
-
The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers.Assigned by: nvd@nist.gov (Primary)
References for CVE-2017-17704
-
https://systemoverlord.com/2017/12/18/cve-2017-17704-broken-cryptography-in-istar-ultra-ip-acm-by-software-house.html
[CVE-2017-17704] Broken Cryptography in iStar Ultra & IP ACM by Software House ยท System OverlordThird Party Advisory
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