sonicwall email-security CVE-2021-20023 vulnerability in SonicWall Products
Published on April 20, 2021

SonicWall Email Security version 10.0.9.x contains a vulnerability that allows a post-authenticated attacker to read an arbitrary file on the remote host.

Vendor Advisory NVD

Known Exploited Vulnerability

This SonicWall Email Security Privilege Escalation Exploit Chain vulnerability is part of CISA's list of Known Exploited Vulnerabilities. SonicWall Email Security version 10.0.9.x contains a vulnerability that allows a post-authenticated attacker to read an arbitrary file on the remote host.

The following remediation steps are recommended / required by November 17, 2021: Apply updates per vendor instructions.

Vulnerability Analysis

CVE-2021-20023 can be exploited with network access, and requires user privileges. This vulnerability is considered to have a low attack complexity. It has an exploitability score of 1.2 out of four. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.

What is a Directory traversal Vulnerability?

The software uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the software does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

CVE-2021-20023 has been classified to as a Directory traversal vulnerability or weakness.


Products Associated with CVE-2021-20023

You can be notified by stack.watch whenever vulnerabilities like CVE-2021-20023 are published in these products:

SonicWall Email Security
 
SonicWall Hosted Email Security
 

What versions are vulnerable to CVE-2021-20023?