Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
High
Attack Vector
Local
0

CVE-2020-3417

Disclosure Date: September 24, 2020 •
CVE-2020-3417 CVSS v3 Base Score: 6.7
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

A vulnerability in Cisco IOS XE Software could allow an authenticated, local attacker to execute persistent code at boot time and break the chain of trust. This vulnerability is due to incorrect validations by boot scripts when specific ROM monitor (ROMMON) variables are set. An attacker could exploit this vulnerability by installing code to a specific directory in the underlying operating system (OS) and setting a specific ROMMON variable. A successful exploit could allow the attacker to execute persistent code on the underlying OS. To exploit this vulnerability, the attacker would need access to the root shell on the device or have physical access to the device.

Add Assessment

No one has assessed this topic. Be the first to add your voice to the community.

CVSS V3 Severity and Metrics
Base Score:
6.7 Medium
Impact Score:
5.9
Exploitability Score:
0.8
Vector:
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack Vector (AV):
Local
Attack Complexity (AC):
Low
Privileges Required (PR):
High
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
Cisco IOS XE Software n/a
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown

Vendors

  • cisco

Products

  • ios xe 16.10.1,
  • ios xe 16.10.1a,
  • ios xe 16.10.1b,
  • ios xe 16.10.1c,
  • ios xe 16.10.1d,
  • ios xe 16.10.1e,
  • ios xe 16.10.1f,
  • ios xe 16.10.1g,
  • ios xe 16.10.1s,
  • ios xe 16.10.2,
  • ios xe 16.10.3,
  • ios xe 16.11.1,
  • ios xe 16.11.1a,
  • ios xe 16.11.1b,
  • ios xe 16.11.1c,
  • ios xe 16.11.1s,
  • ios xe 16.11.2,
  • ios xe 16.12.1,
  • ios xe 16.12.1a,
  • ios xe 16.12.1c,
  • ios xe 16.12.1s,
  • ios xe 16.12.1t,
  • ios xe 16.12.1w,
  • ios xe 16.12.1x,
  • ios xe 16.12.1y,
  • ios xe 16.12.2,
  • ios xe 16.12.2a,
  • ios xe 16.12.2s,
  • ios xe 16.12.2t,
  • ios xe 16.12.3,
  • ios xe 16.12.3a,
  • ios xe 16.6.1,
  • ios xe 16.6.2,
  • ios xe 16.6.3,
  • ios xe 16.6.4,
  • ios xe 16.6.4a,
  • ios xe 16.6.4s,
  • ios xe 16.6.5,
  • ios xe 16.6.5a,
  • ios xe 16.6.5b,
  • ios xe 16.6.6,
  • ios xe 16.6.7,
  • ios xe 16.6.7a,
  • ios xe 16.7.1,
  • ios xe 16.7.1a,
  • ios xe 16.7.1b,
  • ios xe 16.7.2,
  • ios xe 16.7.3,
  • ios xe 16.7.4,
  • ios xe 16.8.1,
  • ios xe 16.8.1a,
  • ios xe 16.8.1b,
  • ios xe 16.8.1c,
  • ios xe 16.8.1d,
  • ios xe 16.8.1e,
  • ios xe 16.8.1s,
  • ios xe 16.8.2,
  • ios xe 16.8.3,
  • ios xe 16.9.1,
  • ios xe 16.9.1a,
  • ios xe 16.9.1b,
  • ios xe 16.9.1c,
  • ios xe 16.9.1d,
  • ios xe 16.9.1s,
  • ios xe 16.9.2,
  • ios xe 16.9.2a,
  • ios xe 16.9.2s,
  • ios xe 16.9.3,
  • ios xe 16.9.3a,
  • ios xe 16.9.3h,
  • ios xe 16.9.3s,
  • ios xe 16.9.4,
  • ios xe 16.9.4c,
  • ios xe 16.9.5,
  • ios xe 16.9.5f,
  • ios xe 17.1.1,
  • ios xe 17.1.1a,
  • ios xe 17.1.1s,
  • ios xe 17.1.1t,
  • ios xe 3.18.0sp,
  • ios xe 3.18.1asp,
  • ios xe 3.18.1bsp,
  • ios xe 3.18.1csp,
  • ios xe 3.18.1gsp,
  • ios xe 3.18.1hsp,
  • ios xe 3.18.1isp,
  • ios xe 3.18.1sp,
  • ios xe 3.18.2asp,
  • ios xe 3.18.2sp,
  • ios xe 3.18.3asp,
  • ios xe 3.18.3bsp,
  • ios xe 3.18.3sp,
  • ios xe 3.18.4sp,
  • ios xe 3.18.5sp,
  • ios xe 3.18.6sp,
  • ios xe 3.18.7sp,
  • ios xe 3.18.8asp,
  • ios xe 3.18.8sp

Additional Info

Authenticated
Unknown
Exploitable
Unknown
Reliability
Unknown
Stability
Unknown
Available Mitigations
Unknown
Shelf Life
Unknown
Userbase/Installbase
Unknown
Patch Effectiveness
Unknown
Technical Analysis