PT-2017-18953 · Cisco · Cisco Dpc3939

Chris Grayson + 2 · Published 2017-07-31 · Updated 2019-10-03 · CVE-2017-9481

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

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

Description The issue allows remote attackers to gain unintended access to the Network Processor (NP) 169.254/16 IP network. This is achieved by adding a routing-table entry that specifies the LAN IP address as the router for that network.

Recommendations For Comcast firmware on Cisco DPC3939 version dpc3939-P20-18-v303r20421746-170221a-CMCST, consider restricting access to the routing-table configuration to prevent unauthorized modifications until a patch is available.

Exploit

Fix

Related Identifiers

CVE-2017-9481

Affected Products

Cisco Dpc3939

References · 3

• 🔥 https://github.com/BastilleResearch/CableTap/blob/master/doc/advisories/bastille-24.atom-ip-routing.txt · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2017-9481 · Security Note
• https://osv.dev/vulnerability/CVE-2017-9481 · Vendor Advisory