7.2
HIGH
CVE-2020-3396
Cisco USB 3.0 SSD Unauthorized File System Modification
Description

A vulnerability in the file system on the pluggable USB 3.0 Solid State Drive (SSD) for Cisco IOS XE Software could allow an authenticated, physical attacker to remove the USB 3.0 SSD and modify sensitive areas of the file system, including the namespace container protections. The vulnerability occurs because the USB 3.0 SSD control data is not stored on the internal boot flash. An attacker could exploit this vulnerability by removing the USB 3.0 SSD, modifying or deleting files on the USB 3.0 SSD by using another device, and then reinserting the USB 3.0 SSD on the original device. A successful exploit could allow the attacker to remove container protections and perform file actions outside the namespace of the container with root privileges.

INFO

Published Date :

Sept. 24, 2020, 6:15 p.m.

Last Modified :

Nov. 21, 2024, 5:30 a.m.

Remotely Exploitable :

No

Impact Score :

6.0

Exploitability Score :

0.5
Affected Products

The following products are affected by CVE-2020-3396 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Cisco ios_xe
2 Cisco asr_1001
3 Cisco asr_1002
4 Cisco asr_1002-x
5 Cisco asr_1004
6 Cisco asr_1006
7 Cisco asr_1013
8 Cisco 1100-4g_integrated_services_router
9 Cisco 1100-4gltegb_integrated_services_router
10 Cisco 1100-4gltena_integrated_services_router
11 Cisco 1100-6g_integrated_services_router
12 Cisco 1100-lte_integrated_services_router
13 Cisco 1100_integrated_services_router
14 Cisco asr_1001-x
15 Cisco asr_1023
16 Cisco 4321\/k9-rf_integrated_services_router
17 Cisco 4321\/k9-ws_integrated_services_router
18 Cisco 4321\/k9_integrated_services_router
19 Cisco 4331\/k9-rf_integrated_services_router
20 Cisco 4331\/k9-ws_integrated_services_router
21 Cisco 4331\/k9_integrated_services_router
22 Cisco 4351\/k9-rf_integrated_services_router
23 Cisco 4351\/k9-ws_integrated_services_router
24 Cisco 4351\/k9_integrated_services_router
25 Cisco asr_1000-x
26 Cisco catalyst_c9300-24p
27 Cisco catalyst_c9300-24s
28 Cisco catalyst_c9300-24t
29 Cisco catalyst_c9300-24u
30 Cisco catalyst_c9300-24ux
31 Cisco catalyst_c9300-48p
32 Cisco catalyst_c9300-48s
33 Cisco catalyst_c9300-48t
34 Cisco catalyst_c9300-48u
35 Cisco catalyst_c9300-48un
36 Cisco catalyst_c9300-48uxm
37 Cisco catalyst_c9300l-24p-4g
38 Cisco catalyst_c9300l-24p-4x
39 Cisco catalyst_c9300l-24t-4g
40 Cisco catalyst_c9300l-24t-4x
41 Cisco catalyst_c9300l-48p-4g
42 Cisco catalyst_c9300l-48p-4x
43 Cisco catalyst_c9300l-48t-4g
44 Cisco catalyst_c9300l-48t-4x
45 Cisco catalyst_c9500-12q
46 Cisco catalyst_c9500-16x
47 Cisco catalyst_c9500-24q
48 Cisco catalyst_c9500-24y4c
49 Cisco catalyst_c9500-32c
50 Cisco catalyst_c9500-32qc
51 Cisco catalyst_c9500-40x
52 Cisco catalyst_c9500-48y4c
53 Cisco csr1000v
54 Cisco catalyst_c9404r
55 Cisco catalyst_c9407r
56 Cisco catalyst_c9410r
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-2020-3396.

URL Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iox-usb-guestshell-WmevScDj Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iox-usb-guestshell-WmevScDj 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-2020-3396 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2020-3396 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 af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iox-usb-guestshell-WmevScDj
  • 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:P/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
    Added CVSS V3.1 Cisco Systems, Inc. AV:P/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
  • CPE Deprecation Remap by [email protected]

    May. 23, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:cisco:isr4321/k9-ws:-:*:*:*:*:*:*:* OR *cpe:2.3:h:cisco:4321/k9-ws_integrated_services_router:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    May. 23, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:cisco:isr4331/k9:-:*:*:*:*:*:*:* OR *cpe:2.3:h:cisco:4331/k9_integrated_services_router:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    May. 23, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:cisco:isr4331/k9-rf:-:*:*:*:*:*:*:* OR *cpe:2.3:h:cisco:4331/k9-rf_integrated_services_router:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    May. 23, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:cisco:isr4331/k9-ws:-:*:*:*:*:*:*:* OR *cpe:2.3:h:cisco:4331/k9-ws_integrated_services_router:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    May. 23, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:cisco:isr4351/k9:-:*:*:*:*:*:*:* OR *cpe:2.3:h:cisco:4351/k9_integrated_services_router:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    May. 23, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:cisco:isr4351/k9-rf:-:*:*:*:*:*:*:* OR *cpe:2.3:h:cisco:4351/k9-rf_integrated_services_router:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    May. 23, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:cisco:isr1100-6g:-:*:*:*:*:*:*:* OR *cpe:2.3:h:cisco:1100-6g_integrated_services_router:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    May. 23, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:cisco:isr1100-4g:-:*:*:*:*:*:*:* OR *cpe:2.3:h:cisco:1100-4g_integrated_services_router:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    May. 23, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:cisco:isr1100-4gltena:-:*:*:*:*:*:*:* OR *cpe:2.3:h:cisco:1100-4gltena_integrated_services_router:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    May. 23, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:cisco:isr1100-4gltegb:-:*:*:*:*:*:*:* OR *cpe:2.3:h:cisco:1100-4gltegb_integrated_services_router:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    May. 23, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:cisco:isr1100-lte:-:*:*:*:*:*:*:* OR *cpe:2.3:h:cisco:1100-lte_integrated_services_router:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    May. 23, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:cisco:isr1100:-:*:*:*:*:*:*:* OR *cpe:2.3:h:cisco:1100_integrated_services_router:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    May. 23, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:cisco:isr4351/k9-ws:-:*:*:*:*:*:*:* OR *cpe:2.3:h:cisco:4351/k9-ws_integrated_services_router:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    May. 23, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:cisco:isr4321/k9:-:*:*:*:*:*:*:* OR *cpe:2.3:h:cisco:4321/k9_integrated_services_router:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    May. 23, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:cisco:isr4321/k9-rf:-:*:*:*:*:*:*:* OR *cpe:2.3:h:cisco:4321/k9-rf_integrated_services_router:-:*:*:*:*:*:*:*
  • Reanalysis by [email protected]

    Oct. 15, 2020

    Action Type Old Value New Value
    Removed CVSS V2 NIST (AV:L/AC:L/Au:N/C:C/I:C/A:C)
    Added CVSS V2 NIST (AV:L/AC:M/Au:N/C:C/I:C/A:C)
  • Initial Analysis by [email protected]

    Oct. 09, 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:P/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
    Changed Reference Type https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iox-usb-guestshell-WmevScDj No Types Assigned https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iox-usb-guestshell-WmevScDj Vendor Advisory
    Added CWE NIST CWE-269
    Added CPE Configuration AND OR *cpe:2.3:o:cisco:ios_xe:16.12.1:*:*:*:*:*:*:* OR cpe:2.3:h:cisco:asr_1000-x:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asr_1001:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asr_1001-x:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asr_1002:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asr_1002-x:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asr_1004:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asr_1006:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asr_1013:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asr_1023:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9300-24p:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9300-24s:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9300-24t:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9300-24u:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9300-24ux:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9300-48p:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9300-48s:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9300-48t:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9300-48u:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9300-48un:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9300-48uxm:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9300l-24p-4g:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9300l-24p-4x:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9300l-24t-4g:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9300l-24t-4x:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9300l-48p-4g:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9300l-48p-4x:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9300l-48t-4g:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9300l-48t-4x:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9404r:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9407r:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9410r:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9500-12q:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9500-16x:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9500-24q:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9500-24y4c:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9500-32c:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9500-32qc:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9500-40x:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_c9500-48y4c:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:csr1000v:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:isr1100:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:isr1100-4g:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:isr1100-4gltegb:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:isr1100-4gltena:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:isr1100-6g:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:isr1100-lte:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:isr4321\/k9:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:isr4321\/k9-rf:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:isr4321\/k9-ws:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:isr4331\/k9:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:isr4331\/k9-rf:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:isr4331\/k9-ws:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:isr4351\/k9:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:isr4351\/k9-rf:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:isr4351\/k9-ws:-:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Sep. 24, 2020

    Action Type Old Value New Value
    Changed Description A vulnerability in the file system on the pluggable USB 3.0 Solid State Drive (SSD) for Cisco IOS XE Software could allow an authenticated, physical attacker to remove the USB 3.0 SSD and modify sensitive areas of the file system, including the namespace container protections. The vulnerability occurs because the USB 3.0 SSD control data is not stored on the internal boot flash. An attacker could exploit this vulnerability by removing the USB 3.0 SSD, modifying or deleting files on the USB 3.0 SSD by using another device, and then reinserting the USB 3.0 SSD on the original device. A successful exploit could allow the attacker to remove container protections and perform file actions outside the namespace of the container with root privileges. A vulnerability in the file system on the pluggable USB 3.0 Solid State Drive (SSD) for Cisco IOS XE Software could allow an authenticated, physical attacker to remove the USB 3.0 SSD and modify sensitive areas of the file system, including the namespace container protections. The vulnerability occurs because the USB 3.0 SSD control data is not stored on the internal boot flash. An attacker could exploit this vulnerability by removing the USB 3.0 SSD, modifying or deleting files on the USB 3.0 SSD by using another device, and then reinserting the USB 3.0 SSD on the original device. A successful exploit could allow the attacker to remove container protections and perform file actions outside the namespace of the container with root privileges.
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2020-3396 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-2020-3396 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

0.10264

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability