vulnwire
7.4high

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 Et…

Published 8 y ago · modified 4 mo ago · JSON

CVSS
7.4
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
1.0%
percentile 63%
Public exploits
0
none known

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 (EPSS)

0.99% probability of exploitation in the next 30 days, higher than 63% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
NVD3.07.4CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
NVD2.05.8AV:N/AC:M/Au:N/C:N/I:P/A:P

Classification

Weakness
  • CWE-330 Use of Insufficiently Random Values

References

  • systemoverlord.com /2017/12/18/cve-2017-17704-broken-cryptography-in-istar-ultra-ip-acm-by-software-house.htm · x_refsource_MISC, x_transferred

Sources

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.