CVE-2017-9521 — CRITICAL (9.8)

Vulnerability Description

The Comcast firmware on Cisco DPC3939 (firmware version dpc3939-P20-18-v303r20421733-160420a-CMCST); Cisco DPC3939 (firmware version dpc3939-P20-18-v303r20421746-170221a-CMCST); Cisco DPC3939B (firmware version dpc3939b-v303r204217-150321a-CMCST); Cisco DPC3941T (firmware version DPC3941_2.5s3_PROD_sey); and Arris TG1682G (eMTA&DOCSIS version 10.0.132.SIP.PC20.CT, software version TG1682_2.2p7s2_PROD_sey) devices allows remote attackers to execute arbitrary code via a specific (but unstated) exposed service. NOTE: the scope of this CVE does NOT include the concept of "Unnecessary Services" in general; the scope is only a single service that is unnecessarily exposed, leading to remote code execution. The details of that service might be disclosed at a later date.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Cisco	Dpc3939 Firmware	dpc3939-p20-18-v303r20421733-160420a-cmcst
Cisco	Dpc3939	-
Cisco	Dpc3939B Firmware	dpc3939b-v303r204217-150321a-cmcst
Cisco	Dpc3939B	-
Cisco	Dpc3941T Firmware	dpc3941_2.5s3_prod_sey
Cisco	Dpc3941T	-
Commscope	Arris Tg1682G Firmware	10.0.132.sip.pc20.ct
Commscope	Arris Tg1682G	-

References

https://github.com/BastilleResearch/CableTap/blob/master/doc/advisories/bastilleExploitMitigationThird Party Advisory
https://github.com/BastilleResearch/CableTap/blob/master/doc/advisories/bastilleExploitMitigationThird Party Advisory

FAQ

What is CVE-2017-9521?

CVE-2017-9521 is a vulnerability with a CVSS score of 9.8 (CRITICAL). The Comcast firmware on Cisco DPC3939 (firmware version dpc3939-P20-18-v303r20421733-160420a-CMCST); Cisco DPC3939 (firmware version dpc3939-P20-18-v303r20421746-170221a-CMCST); Cisco DPC3939B (firmwa...

How severe is CVE-2017-9521?

CVE-2017-9521 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2017-9521?

Check the references section above for vendor advisories and patch information. Affected products include: Cisco Dpc3939 Firmware, Cisco Dpc3939, Cisco Dpc3939B Firmware, Cisco Dpc3939B, Cisco Dpc3941T Firmware.