CVE-2021-20023 SonicWall Email Security Path Traversal
A post-authenticated attacker can read arbitrary files on the remote host via a path traversal vulnerability in SonicWall Email Security.
- Exploited in the wild
- Since 3 Nov 2021
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-20023?
CVE-2021-20023 is a medium-severity path traversal vulnerability in SonicWall Email Security, published on 20 Apr 2021. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
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.
Weakness: CWE-22
Which versions are affected by CVE-2021-20023?
It affects 11 products.
Products include Sonicwall Email Security, Sonicwall Email Security Appliance 3300 Firmware, Sonicwall Email Security Appliance 4300 Firmware, Sonicwall Email Security Appliance 5000 Firmware, Sonicwall Email Security Appliance 5050 Firmware, Sonicwall Email Security Appliance 7000 Firmware and 5 more.
How do I fix CVE-2021-20023?
No fix has been published for CVE-2021-20023 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 17 Nov 2021.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2021-20023 being exploited?
Yes. Attackers have exploited CVE-2021-20023 in the wild since at least 3 Nov 2021, including in ransomware campaigns.
Other vulnerabilities in SonicWall Email Security
Sources
Also known as GHSA-86qp-448h-m269.