CVE-2020-3417
"Cisco IOS XE Persistent Boot Code Execution"
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.
INFO
Published Date :
Sept. 24, 2020, 6:15 p.m.
Last Modified :
Nov. 7, 2023, 3:22 a.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
0.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-3417.
| URL | Resource |
|---|---|
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xbace-OnCEbyS | Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-3417 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-3417 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Removed CVSS V3 Cisco Systems, Inc. AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Added CVSS V3.1 Cisco Systems, Inc. AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H -
Reanalysis by [email protected]
Nov. 24, 2020
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:o:cisco:ios_xe:17.2:*:*:*:*:*:*:* OR *cpe:2.3:o:cisco:ios_xe:3.18.0sp:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:3.18.1asp:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:3.18.1bsp:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:3.18.1csp:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:3.18.1gsp:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:3.18.1hsp:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:3.18.1isp:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:3.18.1sp:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:3.18.2asp:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:3.18.2sp:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:3.18.3asp:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:3.18.3bsp:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:3.18.3sp:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:3.18.4sp:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:3.18.5sp:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:3.18.6sp:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:3.18.7sp:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:3.18.8asp:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:3.18.8sp:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.6.1:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.6.2:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.6.3:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.6.4:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.6.4a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.6.4s:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.6.5:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.6.5a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.6.5b:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.6.6:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.6.7:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.6.7a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.7.1:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.7.1a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.7.1b:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.7.2:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.7.3:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.7.4:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.8.1:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.8.1a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.8.1b:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.8.1c:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.8.1d:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.8.1e:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.8.1s:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.8.2:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.8.3:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.9.1:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.9.1a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.9.1b:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.9.1c:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.9.1d:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.9.1s:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.9.2:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.9.2a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.9.2s:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.9.3:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.9.3a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.9.3h:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.9.3s:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.9.4:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.9.4c:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.9.5:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.9.5f:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.10.1:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.10.1a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.10.1b:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.10.1c:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.10.1d:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.10.1e:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.10.1f:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.10.1g:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.10.1s:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.10.2:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.10.3:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.11.1:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.11.1a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.11.1b:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.11.1c:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.11.1s:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.11.2:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.12.1:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.12.1a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.12.1c:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.12.1s:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.12.1t:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.12.1w:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.12.1x:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.12.1y:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.12.2:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.12.2a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.12.2s:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.12.2t:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.12.3:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:16.12.3a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.1.1:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.1.1a:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.1.1s:*:*:*:*:*:*:* *cpe:2.3:o:cisco:ios_xe:17.1.1t:*:*:*:*:*:*:* -
Initial Analysis by [email protected]
Oct. 06, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:C/I:C/A:C) Added CVSS V3.1 NIST AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xbace-OnCEbyS No Types Assigned https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xbace-OnCEbyS Vendor Advisory Added CWE NIST CWE-78 Added CPE Configuration OR *cpe:2.3:o:cisco:ios_xe:17.2:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Sep. 24, 2020
Action Type Old Value New Value Changed 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. 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.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-3417 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-3417
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.04 }} 0.00%
score
0.05784
percentile