Critical severity · published Jul 31, 2017
CVE-2017-9521
The Comcast firmware on Cisco DPC3939 (firmware version dpc3939-P20-18-v303r20421733-160420a-CMCST); Cisco DPC3939 (firmware version dpc3939-P20-18-v303r20421746-170221a-CMCST);…
9.8
CVSS
3.3%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.3% · higher than 88% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AT
Arris Tg1682g Firmware · Commscope
10.0.132.sip.pc20.ct; tg1682_2.2p7s2_prod_sey · source: NVD
DF
Dpc3939 Firmware · Cisco
dpc3939-p20-18-v303r20421733-160420a-cmcst; dpc3939-p20-18-v303r20421746-170221a-cmcst · source: NVD
DF
Dpc3939b Firmware · Cisco
dpc3939b-v303r204217-150321a-cmcst · source: NVD
DF
Dpc3941t Firmware · Cisco
dpc3941_2.5s3_prod_sey · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-9521
CVE.org
https://www.cve.org/CVERecord?id=CVE-2017-9521
Exploit
https://github.com/BastilleResearch/CableTap/blob/master/doc/advisories/bastille-32.unnecessary-services.txt
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