An access control weakness in the DTMF tone receiver of...
Low severity
Unreviewed
Published
May 24, 2022
to the GitHub Advisory Database
•
Updated Jan 29, 2023
Description
Published by the National Vulnerability Database
Dec 24, 2019
Published to the GitHub Advisory Database
May 24, 2022
Last updated
Jan 29, 2023
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).
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