What is CVE-2017-9478?

CVE-2017-9478 is a high-severity vulnerability in Cisco Dpc3939, classified under Information Disclosure. CVSS score: 7.5/10. Published 2017-07-31.

How severe is CVE-2017-9478?

High severity. CVSS v3 base score is 7.5 out of 10.

Information disclosure in Cisco Dpc3939

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.

Vulnerability class: Information Disclosure

EPSS: 0.015 (71.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Cisco Dpc3939
Cisco Dpc3939_firmware — versions dpc3939-p20-18-v303r20421746-170221a-cmcst, dpc3939-p20-18-v303r20421733-160420a-cmcst
N/a — versions n/a

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2017-9478?: CVE-2017-9478 is a high-severity vulnerability in Cisco Dpc3939, classified under Information Disclosure. CVSS score: 7.5/10. Published 2017-07-31.
How severe is CVE-2017-9478?: High severity. CVSS v3 base score is 7.5 out of 10.