Vulnerability Monitor

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CVE-2017-9487

The Comcast firmware on Cisco DPC3939 (firmware version dpc3939-P20-18-v303r20421746-170221a-CMCST) and DPC3941T (firmware version DPC3941_2.5s3_PROD_sey) devices allows remote attackers to discover a WAN IPv6 IP address by leveraging knowledge of the CM MAC address.

Published

2017-07-31T03:29:00.597

Last Modified

2025-04-20T01:37:25.860

Status

Deferred

Source

[email protected]

Severity

CVSSv3.0: 5.9 (MEDIUM)

CVSSv2 Vector

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

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: NONE

Exploitability Score

8.6

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	dpc3941t_firmware	dpc3941_2.5s3_prod_sey	Yes
Hardware	cisco	dpc3941t	-	No

References

https://github.com/BastilleResearch/CableTap/blob/master/doc/advisories/bastille-30.wan0-ipv6-cm-mac.txt Exploit, Third Party Advisory ([email protected])
https://github.com/BastilleResearch/CableTap/blob/master/doc/advisories/bastille-30.wan0-ipv6-cm-mac.txt Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)