Vulnerability Monitor

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CVE-2017-9477

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 allows remote attackers to discover the CM MAC address by connecting to the device's xfinitywifi hotspot.

Published

2017-07-31T03:29:00.270

Last Modified

2025-04-20T01:37:25.860

Status

Deferred

Source

[email protected]

Severity

CVSSv3.0: 6.5 (MEDIUM)

CVSSv2 Vector

AV:A/AC:L/Au:N/C:P/I:N/A:N

Access Vector: ADJACENT_NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: NONE

Exploitability Score

6.5

Impact Score

2.9

Weaknesses

Type: Primary
CWE-200

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	cisco	dpc3939_firmware	dpc3939-p20-18-v303r20421746-170221a-cmcst	Yes
Hardware	cisco	dpc3939	-	No
Operating System	cisco	dpc3939_firmware	dpc3939-p20-18-v303r20421733-160420a-cmcst	Yes
Hardware	cisco	dpc3939	-	No

References

https://github.com/BastilleResearch/CableTap/blob/master/doc/advisories/bastille-19.wifi-dhcp-cm-mac-leak.txt Exploit, Mitigation, Third Party Advisory ([email protected])
https://github.com/BastilleResearch/CableTap/blob/master/doc/advisories/bastille-19.wifi-dhcp-cm-mac-leak.txt Exploit, Mitigation, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)