CVE-2017-9478

The Comcast firmware on Cisco DPC3939 (firmware version dpc3939-P20-18-v303r20421733-160420a-CMCST) and DPC3939 (firmware version dpc3939-P20-18-v303r20421746-170221a-CMCST) devices sets the CM MAC address to a value with a two-byte offset from the MTA/VoIP MAC address, which indirectly allows remote attackers to discover hidden Home Security Wi-Fi networks by leveraging the embedding of the MTA/VoIP MAC address into the DNS hostname.

CVSS v3.0

7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS v2.0

5.0 MEDIUMAV:N/AC:L/Au:N/C:P/I:N/A:N

EPSS

1.51% chance of exploitation in the next 30 days, 73th percentile

Published

2017-07-31

Updated

2024-08-05

Proof-of-concept exploits (1)

• BastilleResearch/CableTap/blob/master/doc/advisories/bastille-20.emta-reverse-dns.txt

References

• CVE Record
• NVD entry

Related

• CVE-2017-9476
• CVE-2017-9477
• CVE-2017-9479
• CVE-2017-9480
• CVE-2017-9481
• CVE-2017-9482