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. 7, 2023, 3:22 a.m.

Source :

[email protected]

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
: Total Affected Vendor : 1 | Products : 1
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

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 [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-rf:-:*:*:*:*:*:*:* OR *cpe:2.3:h:cisco:4321/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: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:-:*:*:*:*:*:*:*
  • 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.

CAPEC-58: Restful Privilege Elevation Restful Privilege Elevation CAPEC-122: Privilege Abuse Privilege Abuse CAPEC-233: Privilege Escalation Privilege Escalation CAPEC-19: Embedding Scripts within Scripts Embedding Scripts within Scripts CAPEC-441: Malicious Logic Insertion Malicious Logic Insertion CAPEC-478: Modification of Windows Service Configuration Modification of Windows Service Configuration CAPEC-479: Malicious Root Certificate Malicious Root Certificate CAPEC-502: Intent Spoof Intent Spoof CAPEC-503: WebView Exposure WebView Exposure CAPEC-536: Data Injected During Configuration Data Injected During Configuration CAPEC-546: Incomplete Data Deletion in a Multi-Tenant Environment Incomplete Data Deletion in a Multi-Tenant Environment CAPEC-550: Install New Service Install New Service CAPEC-551: Modify Existing Service Modify Existing Service CAPEC-552: Install Rootkit Install Rootkit CAPEC-556: Replace File Extension Handlers Replace File Extension Handlers CAPEC-558: Replace Trusted Executable Replace Trusted Executable CAPEC-562: Modify Shared File Modify Shared File CAPEC-563: Add Malicious File to Shared Webroot Add Malicious File to Shared Webroot CAPEC-564: Run Software at Logon Run Software at Logon CAPEC-578: Disable Security Software Disable Security Software
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
: