CVE-2021-20034 Path traversal in SMA100
Remote unauthenticated attackers can bypass path traversal checks to delete arbitrary files, potentially forcing a factory reset on SonicWall SMA100 devices.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-20034?
CVE-2021-20034 is a critical path traversal vulnerability in SonicWall SMA100, published on 27 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2021-20034?
It affects 5 products.
Products include Sonicwall Sma 200 Firmware, Sonicwall Sma 210 Firmware, Sonicwall Sma 400 Firmware, Sonicwall Sma 410 Firmware, Sonicwall Sma 500v.
How do I fix CVE-2021-20034?
No fix has been published for CVE-2021-20034 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2021-20034 being exploited?
There is no known exploitation of CVE-2021-20034 in the wild and no public exploit code.
Public exploit code: 1 Exploit-DB entry.
Other vulnerabilities in SonicWall SMA100
- CVE-2021-20038 SonicWall SMA 100 Appliances Stack-Based Buffer Overflow
- CVE-2023-44221 SonicWall SMA100 Appliances OS Command Injection
- CVE-2021-20035 SonicWall SMA100 Appliances OS Command Injection
- CVE-2022-22273 Command injection in SonicWall SRA/SMA100
- CVE-2021-20042 Server-side request forgery in SonicWall SMA100
Sources
Also known as GHSA-vfqg-fwg4-f3vx.