CVE-2017-17704

Current 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.

Basic Data

PublishedDecember 31, 2017
Last ModifiedOctober 03, 2019
Assignercve@mitre.org
Data TypeCVE
Data FormatMITRE
Data Version4.0
Problem TypeCWE-330
CVE Data Version4.0

Base Metric V2

CVSS 2 - Version2.0
CVSS 2 - Vector StringAV:N/AC:M/Au:N/C:N/I:P/A:P
CVSS 2 - Access VectorNETWORK
CVSS 2 - Access ComplexityMEDIUM
CVSS 2 - AuthenticationNONE
CVSS 2 - Confidentiality ImpactNONE
CVSS 2 - Availability ImpactPARTIAL
CVSS 2 - Base Score5.8
SeverityMEDIUM
Exploitability Score8.6
Impact Score4.9
Obtain All Privilegefalse
Obtain User Privilegefalse
Obtain Other Privilegefalse

Base Metric V3

CVSS 3 - Version3.0
CVSS 3 - Vector StringCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
CVSS 3 - Attack VectorNETWORK
CVSS 3 - Attack ComplexityHIGH
CVSS 3 - Privileges RequiredNONE
CVSS 3 - User InteractionNONE
CVSS 3 - ScopeUNCHANGED
CVSS 3 - Confidentiality ImpactNONE
CVSS 3 - Integrity ImpactHIGH
CVSS 3 - Availability ImpactHIGH
CVSS 3 - Base Score7.4
CVSS 3 - Base SeverityHIGH
Exploitability Score2.2
Base SeverityHIGH

Configurations

  • AND
    • OR - Configuration 1
      Cpe VersionPartVendorProductVersionUpdateEditionLanguageSW EditionTarget SWTarget HWOtherVersion Start IncludingVersion End IncludingVersion Start ExcludingVersion End Excluding
      2.3OSSwhouseIstar Ultra Firmware********6.5.2.20569
    • OR Running on/with:
      Cpe VersionPartVendorProductVersionUpdateEditionLanguageSW EditionTarget SWTarget HWOtherVersion Start IncludingVersion End IncludingVersion Start ExcludingVersion End Excluding
      2.3HardwareSwhouseIstar Ultra-*******

Vulnerable Software List

VendorProductVersions
Swhouse Istar Ultra Firmware *

References

NameSourceURLTags
https://systemoverlord.com/2017/12/18/cve-2017-17704-broken-cryptography-in-istar-ultra-ip-acm-by-software-house.htmlhttps://systemoverlord.com/2017/12/18/cve-2017-17704-broken-cryptography-in-istar-ultra-ip-acm-by-soMISCThird Party Advisory