CVE-2017-14937 Weak cryptography in n/a
Attackers with CAN bus access can detonate airbags due to weak authentication keys and lack of rate limiting, posing physical injury risks.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2017-14937?
CVE-2017-14937 is a medium-severity vulnerability in n/a, published on 20 Oct 2017. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The airbag detonation algorithm allows injury to passenger-car occupants via predictable Security Access (SA) data to the internal CAN bus (or the OBD connector). This affects the airbag control units (aka pyrotechnical control units or PCUs) of unspecified passenger vehicles manufactured in 2014 or later, when the ignition is on and the speed is less than 6 km/h. Specifically, there are only 256 possible key pairs, and authentication attempts have no rate limit. In addition, at least one manufacturer's interpretation of the ISO 26021 standard is that it must be possible to calculate the key directly (i.e., the other 255 key pairs must not be used). Exploitation would typically involve an attacker who has already gained access to the CAN bus, and sends a crafted Unified Diagnostic Service (UDS) message to detonate the pyrotechnical charges, resulting in the same passenger-injury risks as in any airbag deployment.
Weakness: CWE-327
Which versions are affected by CVE-2017-14937?
It affects 1 product.
Products include Pcu Pcu.
How do I fix CVE-2017-14937?
No fix has been published for CVE-2017-14937 yet. Limit exposure of the affected software until one is available.
Is CVE-2017-14937 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2017-14937 exists.
Public exploit code: 1 Metasploit module.
Sources
Also known as GHSA-j2vv-fr99-j8xg.