CVE-2021-32699 Asymmetric Resource Consumption (Amplification) in Docker containers created by Wings
A malicious user can exhaust system resources in Pterodactyl Wings, causing denial of service on the host server.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-32699?
CVE-2021-32699 is a medium-severity denial of service vulnerability in pterodactyl wings, published on 22 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Wings is the control plane software for the open source Pterodactyl game management system. All versions of Pterodactyl Wings prior to `1.4.4` are vulnerable to system resource exhaustion due to improper container process limits being defined. A malicious user can consume more resources than intended and cause downstream impacts to other clients on the same hardware, eventually causing the physical server to stop responding. Users should upgrade to `1.4.4` to mitigate the issue. There is no non-code based workaround for impacted versions of the software. Users running customized versions of this software can manually set a PID limit for containers created.
Which versions are affected by CVE-2021-32699?
3 open source packages ship an affected version, including github.com/pterodactyl/wings. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/pterodactyl/wings Go | All versions | 1.4.4 |
github.com/pterodactyl/wings Go | All versions | 1.4.4 |
github.com/pterodactyl/wings Go | All versions | 1.4.4 |
Products include Pterodactyl Wings.
How do I fix CVE-2021-32699?
Upgrade github.com/pterodactyl/wings to 1.4.4 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-32699 being exploited?
There is no known exploitation of CVE-2021-32699 in the wild and no public exploit code.
Other vulnerabilities in pterodactyl wings
- CVE-2024-27102 Improper isolation of server file access in github.com/pterodactyl/wings
- CVE-2023-25168 Symbolic Link (Symlink) Following allowing the deletion of files and directories on the host system in wings
- CVE-2023-32080 Wings vulnerable to escape to host from installation container
- CVE-2024-34066 Arbitrary File Write/Read in Pterodactyl wings
- CVE-2023-25152 Symbolic Link (Symlink) Following in github.com/pterodactyl/wings
Sources
Also known as GHSA-jj6m-r8jc-2gp7, GO-2022-0919.