6.7
MEDIUM
CVE-2021-34729
"Cisco IOS XE SD-WAN Software and Cisco IOS XE Command Injection Vulnerability"
Description

A vulnerability in the CLI of Cisco IOS XE SD-WAN Software and Cisco IOS XE Software could allow an authenticated, local attacker to execute arbitrary commands with elevated privileges on an affected device. This vulnerability is due to insufficient validation of arguments passed to certain CLI commands. An attacker could exploit this vulnerability by including malicious input in the argument of an affected command. A successful exploit could allow the attacker to execute arbitrary commands with elevated privileges on the underlying operating system. An attacker would need valid user credentials to exploit this vulnerability.

INFO

Published Date :

Sept. 23, 2021, 3:15 a.m.

Last Modified :

Nov. 7, 2023, 3:36 a.m.

Source :

[email protected]

Remotely Exploitable :

No

Impact Score :

5.9

Exploitability Score :

0.8
Affected Products

The following products are affected by CVE-2021-34729 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 sd-wan
3 Cisco ios_xe_sd-wan
: Total Affected Vendor : 1 | Products : 3
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-2021-34729.

URL Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ioxesdwan-clicmdinj-7bYX5k3 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-2021-34729 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-34729 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:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
    Added CVSS V3.1 Cisco Systems, Inc. AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
  • Reanalysis by [email protected]

    Oct. 24, 2022

    Action Type Old Value New Value
    Removed CWE NIST CWE-77
    Added CWE NIST CWE-78
  • Reanalysis by [email protected]

    Nov. 23, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:cisco:ios_xe:*:*:*:*:*:*:*:* versions up to (including) 17.3.1a *cpe:2.3:o:cisco:ios_xe_sd-wan:*:*:*:*:*:*:*:* versions up to (including) 17.3.1a OR *cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* versions up to (including) 17.3.1a *cpe:2.3:o:cisco:ios_xe_sd-wan:*:*:*:*:*:*:*:* versions up to (including) 17.3.1a
  • Initial Analysis by [email protected]

    Oct. 13, 2021

    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-ioxesdwan-clicmdinj-7bYX5k3 No Types Assigned https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ioxesdwan-clicmdinj-7bYX5k3 Vendor Advisory
    Added CWE NIST CWE-77
    Added CPE Configuration OR *cpe:2.3:a:cisco:ios_xe:*:*:*:*:*:*:*:* versions up to (including) 17.3.1a *cpe:2.3:o:cisco:ios_xe_sd-wan:*:*:*:*:*:*:*:* versions up to (including) 17.3.1a
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-2021-34729 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-2021-34729 weaknesses.

CAPEC-15: Command Delimiters Command Delimiters CAPEC-40: Manipulating Writeable Terminal Devices Manipulating Writeable Terminal Devices CAPEC-43: Exploiting Multiple Input Interpretation Layers Exploiting Multiple Input Interpretation Layers CAPEC-75: Manipulating Writeable Configuration Files Manipulating Writeable Configuration Files CAPEC-76: Manipulating Web Input to File System Calls Manipulating Web Input to File System Calls CAPEC-136: LDAP Injection LDAP Injection CAPEC-183: IMAP/SMTP Command Injection IMAP/SMTP Command Injection CAPEC-248: Command Injection Command Injection CAPEC-6: Argument Injection Argument Injection CAPEC-15: Command Delimiters Command Delimiters CAPEC-43: Exploiting Multiple Input Interpretation Layers Exploiting Multiple Input Interpretation Layers CAPEC-88: OS Command Injection OS Command Injection CAPEC-108: Command Line Execution through SQL Injection Command Line Execution through SQL Injection
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

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