CVE-2017-17704 Weak cryptography in n/a
Attackers can unlock doors on iStar Ultra systems by replaying or forging messages due to fixed AES keys and lack of authentication.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2017-17704?
CVE-2017-17704 is a high-severity vulnerability in n/a, published on 31 Dec 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-330
Which versions are affected by CVE-2017-17704?
It affects 1 product.
Products include Swhouse Istar Ultra Firmware.
How do I fix CVE-2017-17704?
No fix has been published for CVE-2017-17704 yet. Limit exposure of the affected software until one is available.
Is CVE-2017-17704 being exploited?
There is no known exploitation of CVE-2017-17704 in the wild and no public exploit code.
Sources
Also known as GHSA-2p4x-3pfm-qg42.