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MitreCVE-2017-9477

HistoryJul 31, 2017 - 3:29 a.m.

CVE-2017-9477

2017-07-3103:29:00

CWE-200

mitre

web.nvd.nist.gov

comcast

cisco

dpc3939

firmware

vulnerability

remote attack

mac address

xfinitywifi

nvd

cve-2017-9477

CVSS2

3.3

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

CVSS3

6.5

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

6.6

Confidence

High

EPSS

0.003

Percentile

70.2%

JSON

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.

Affected configurations

Nvd

Node

ciscodpc3939_firmwareMatchdpc3939-p20-18-v303r20421746-170221a-cmcst

AND

ciscodpc3939Match-

Node

ciscodpc3939_firmwareMatchdpc3939-p20-18-v303r20421733-160420a-cmcst

AND

ciscodpc3939Match-

VendorProductVersionCPE
ciscodpc3939_firmwaredpc3939-p20-18-v303r20421746-170221a-cmcstcpe:2.3:o:cisco:dpc3939_firmware:dpc3939-p20-18-v303r20421746-170221a-cmcst:*:*:*:*:*:*:*
ciscodpc3939-cpe:2.3:h:cisco:dpc3939:-:*:*:*:*:*:*:*
ciscodpc3939_firmwaredpc3939-p20-18-v303r20421733-160420a-cmcstcpe:2.3:o:cisco:dpc3939_firmware:dpc3939-p20-18-v303r20421733-160420a-cmcst:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
cisco	dpc3939_firmware	dpc3939-p20-18-v303r20421746-170221a-cmcst	cpe:2.3:o:cisco:dpc3939_firmware:dpc3939-p20-18-v303r20421746-170221a-cmcst:::::::*
cisco	dpc3939	-	cpe:2.3:h:cisco:dpc3939:-:::::::*
cisco	dpc3939_firmware	dpc3939-p20-18-v303r20421733-160420a-cmcst	cpe:2.3:o:cisco:dpc3939_firmware:dpc3939-p20-18-v303r20421733-160420a-cmcst:::::::*

References

github.com/BastilleResearch/CableTap/blob/master/doc/advisories/bastille-19.wifi-dhcp-cm-mac-leak.txt

CVSS2

3.3

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

CVSS3

6.5

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

6.6

Confidence

High

EPSS

0.003

Percentile

70.2%

JSON

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