CVE-2017-16778 — MEDIUM (4.6)

Vulnerability 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).

CVSS Score

4.6

MEDIUM

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector

PHYSICAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

HIGH

Availability

NONE

Affected Products

Vendor	Product	Versions
Fermax	Outdoor Panel Firmware	-
Fermax	Outdoor Panel	-

Related Weaknesses (CWE)

CWE-863

References

https://github.com/breaktoprotect/CVE-2017-16778-Intercom-DTMF-InjectionThird Party Advisory
https://github.com/breaktoprotect/CVE-2017-16778-Intercom-DTMF-InjectionThird Party Advisory

FAQ

What is CVE-2017-16778?

CVE-2017-16778 is a vulnerability with a CVSS score of 4.6 (MEDIUM). 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 phys...

How severe is CVE-2017-16778?

CVE-2017-16778 has been rated MEDIUM with a CVSS base score of 4.6/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2017-16778?

Check the references section above for vendor advisories and patch information. Affected products include: Fermax Outdoor Panel Firmware, Fermax Outdoor Panel.