CVE-2017-9478 Information disclosure in n/a

High 7.5 Published 31 Jul 2017 Updated 5 Aug 2024

Remote attackers can discover hidden Home Security Wi-Fi networks by exploiting MAC address offsets in Cisco DPC3939 firmware.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2017-9478?

CVE-2017-9478 is a high-severity vulnerability in n/a, published on 31 Jul 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-200

Which versions are affected by CVE-2017-9478?

It affects 1 product.

Products include Cisco Dpc3939 Firmware.

How do I fix CVE-2017-9478?

No fix has been published for CVE-2017-9478 yet. Limit exposure of the affected software until one is available.

Is CVE-2017-9478 being exploited?

There is no known exploitation of CVE-2017-9478 in the wild and no public exploit code.

Sources

Also known as GHSA-wcmp-jh6v-8592.