9.1
CRITICAL
CVE-2021-20034
SMA100 Path Traversalfilename Deletion
Description

An improper access control vulnerability in SMA100 allows a remote unauthenticated attacker to bypass the path traversal checks and delete an arbitrary file potentially resulting in a reboot to factory default settings.

INFO

Published Date :

Sept. 27, 2021, 6:15 p.m.

Last Modified :

July 8, 2022, 6:21 p.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

5.2

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2021-20034 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 Sonicwall sma_210_firmware
2 Sonicwall sma_410_firmware
3 Sonicwall sma_200_firmware
4 Sonicwall sma_400_firmware
5 Sonicwall sma_500v
6 Sonicwall sma100_firmware
: Total Affected Vendor : 1 | Products : 6
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-2021-20034.

URL Resource
http://packetstormsecurity.com/files/164564/SonicWall-SMA-10.2.1.0-17sv-Password-Reset.html Exploit Third Party Advisory VDB Entry
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0021 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-2021-20034 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-20034 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
  • Reanalysis by [email protected]

    Jul. 08, 2022

    Action Type Old Value New Value
    Removed CWE NIST CWE-269
    Added CWE NIST CWE-22
  • Modified Analysis by [email protected]

    Nov. 05, 2021

    Action Type Old Value New Value
    Changed Reference Type http://packetstormsecurity.com/files/164564/SonicWall-SMA-10.2.1.0-17sv-Password-Reset.html No Types Assigned http://packetstormsecurity.com/files/164564/SonicWall-SMA-10.2.1.0-17sv-Password-Reset.html Exploit, Third Party Advisory, VDB Entry
  • CVE Modified by [email protected]

    Oct. 20, 2021

    Action Type Old Value New Value
    Added Reference http://packetstormsecurity.com/files/164564/SonicWall-SMA-10.2.1.0-17sv-Password-Reset.html [No Types Assigned]
  • Initial Analysis by [email protected]

    Oct. 06, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:P/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
    Changed Reference Type https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0021 No Types Assigned https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0021 Vendor Advisory
    Added CWE NIST CWE-269
    Added CPE Configuration AND OR *cpe:2.3:o:sonicwall:sma_200_firmware:*:*:*:*:*:*:*:* versions up to (including) 9.0.0.10-28sv *cpe:2.3:o:sonicwall:sma_200_firmware:*:*:*:*:*:*:*:* versions from (including) 10.2.0.0 up to (including) 10.2.0.7-34sv *cpe:2.3:o:sonicwall:sma_200_firmware:*:*:*:*:*:*:*:* versions from (including) 10.2.1.0 up to (including) 10.2.1.0-17sv OR cpe:2.3:h:sonicwall:sma_200:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:sonicwall:sma_210_firmware:*:*:*:*:*:*:*:* versions up to (including) 9.0.0.10-28sv *cpe:2.3:o:sonicwall:sma_210_firmware:*:*:*:*:*:*:*:* versions from (including) 10.2.0.0 up to (including) 10.2.0.7-34sv *cpe:2.3:o:sonicwall:sma_210_firmware:*:*:*:*:*:*:*:* versions from (including) 10.2.1.0 up to (including) 10.2.1.0-17sv OR cpe:2.3:h:sonicwall:sma_210:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:sonicwall:sma_400_firmware:*:*:*:*:*:*:*:* versions up to (including) 9.0.0.10-28sv *cpe:2.3:o:sonicwall:sma_400_firmware:*:*:*:*:*:*:*:* versions from (including) 10.2.0.0 up to (including) 10.2.0.7-34sv *cpe:2.3:o:sonicwall:sma_400_firmware:*:*:*:*:*:*:*:* versions from (including) 10.2.1.0 up to (including) 10.2.1.0-17sv OR cpe:2.3:h:sonicwall:sma_400:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:sonicwall:sma_410_firmware:*:*:*:*:*:*:*:* versions up to (including) 9.0.0.10-28sv *cpe:2.3:o:sonicwall:sma_410_firmware:*:*:*:*:*:*:*:* versions from (including) 10.2.0.0 up to (including) 10.2.0.7-34sv *cpe:2.3:o:sonicwall:sma_410_firmware:*:*:*:*:*:*:*:* versions from (including) 10.2.1.0 up to (including) 10.2.1.0-17sv OR cpe:2.3:h:sonicwall:sma_410:-:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:a:sonicwall:sma_500v:*:*:*:*:*:*:*:* versions up to (including) 9.0.0.10-28sv *cpe:2.3:a:sonicwall:sma_500v:*:*:*:*:*:*:*:* versions from (including) 10.2.0.0 up to (including) 10.2.0.7-34sv *cpe:2.3:a:sonicwall:sma_500v:*:*:*:*:*:*:*:* versions from (including) 10.2.1.0 up to (including) 10.2.1.0-17sv
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-2021-20034 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-2021-20034 weaknesses.

CAPEC-64: Using Slashes and URL Encoding Combined to Bypass Validation Logic Using Slashes and URL Encoding Combined to Bypass Validation Logic CAPEC-76: Manipulating Web Input to File System Calls Manipulating Web Input to File System Calls CAPEC-78: Using Escaped Slashes in Alternate Encoding Using Escaped Slashes in Alternate Encoding CAPEC-79: Using Slashes in Alternate Encoding Using Slashes in Alternate Encoding CAPEC-126: Path Traversal Path Traversal 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.

51.90 }} -12.23%

score

0.97653

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
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