PT-2017-2836 · Comcast+1 · Comcast Firmware+2

Chris Grayson + 2 · Published 2017-07-31 · Updated 2019-10-03 · CVE-2017-9482

Positive Technologies (AI Summary)

CVSS v3.1

10

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Comcast firmware on Cisco DPC3939 version dpc3939-P20-18-v303r20421746-170221a-CMCST

Description The issue is related to insufficient access control in the TELNET session of the Comcast firmware on Cisco DPC3939 devices. This allows a remote attacker to gain root access to the Network Processor Linux system by exploiting the vulnerability and establishing a TELNET session.

Recommendations For Comcast firmware on Cisco DPC3939 version dpc3939-P20-18-v303r20421746-170221a-CMCST, consider disabling the TELNET daemon as a temporary workaround until a patch is available. Restrict access to the TELNET session to minimize the risk of exploitation.

Exploit

Fix

Incorrect Permission

Weakness Enumeration

CWE-732

CWE-264

Related Identifiers

BDU:2017-02116

CVE-2017-9482

Affected Products

Cisco Dpc3939

Comcast Firmware

Network Processor Linux

References · 4

• 🔥 https://github.com/BastilleResearch/CableTap/blob/master/doc/advisories/bastille-25.atom-telnet.txt · Exploit
• https://bdu.fstec.ru/vul/2017-02116 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2017-9482 · Security Note
• https://osv.dev/vulnerability/CVE-2017-9482 · Vendor Advisory