CVE-2018-3969 Command injection in CUJO
A local attacker can inject shell commands into the DHCP configuration file to execute arbitrary code and bypass verified boot protections.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2018-3969?
CVE-2018-3969 is a high-severity command injection vulnerability in CUJO, published on 21 Mar 2019. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An exploitable vulnerability exists in the verified boot protection of the CUJO Smart Firewall. It is possible to add arbitrary shell commands into the dhcpd.conf file, that persist across reboots and firmware updates, and thus allow for executing unverified commands. To trigger this vulnerability, a local attacker needs to be able to write into /config/dhcpd.conf.
Weakness: CWE-78
Which versions are affected by CVE-2018-3969?
It affects 1 product.
Products include Getcujo Smart Firewall.
How do I fix CVE-2018-3969?
No fix has been published for CVE-2018-3969 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2018-3969 being exploited?
There is no known exploitation of CVE-2018-3969 in the wild and no public exploit code.
Other vulnerabilities in CUJO
Sources
Also known as GHSA-q2x2-24ph-2wxf.