CVE-2017-16778 Auth bypass in n/a
Physical attackers can inject DTMF tones to bypass access controls and gain unauthorized entry to restricted floors.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2017-16778?
CVE-2017-16778 is a medium-severity authentication bypass vulnerability in n/a, published on 24 Dec 2019. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An access control weakness in the DTMF tone receiver of Fermax Outdoor Panel allows physical attackers to inject a Dual-Tone-Multi-Frequency (DTMF) tone to invoke an access grant that would allow physical access to a restricted floor/level. By design, only a residential unit owner may allow such an access grant. However, due to incorrect access control, an attacker could inject it via the speaker unit to perform an access grant to gain unauthorized access, as demonstrated by a loud DTMF tone representing '1' and a long '#' (697 Hz and 1209 Hz, followed by 941 Hz and 1477 Hz).
Weakness: CWE-863
Which versions are affected by CVE-2017-16778?
It affects 1 product.
Products include Fermax Outdoor Panel Firmware.
How do I fix CVE-2017-16778?
No fix has been published for CVE-2017-16778 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2017-16778 being exploited?
There is no known exploitation of CVE-2017-16778 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-54w4-4qgr-936w.