| Package | Affected versions | Patched versions |
|---|---|---|
| github.com/0xJacky/Nginx-UI | ≤ 1.99all versions | |
| nginx ui | < 2.3.4 | 2.3.4 |
An input validation vulnerability in the logrotate configuration allows an authenticated user to cause a complete Denial of Service (DoS). By submitting a negative integer for the rotation interval, the backend enters an infinite loop or an invalid state, rendering the web interface unresponsive.
The vulnerability exists in the handler for the POST /api/settings endpoint. Specifically, the logrotate.interval field is accepted as a signed integer without lower-bound verification. When a negative value is processed by the backend logic responsible for scheduling or calculating the next rotation, it triggers a non-terminating loop. This consumes CPU resources and prevents the Go web server from handling further concurrent requests.
Environment:
docker run -dit \
--name=nginx-ui \
--restart=always \
-v /mnt/user4/appdata/nginx:/etc/nginx \
-v /mnt/user4/appdata/nginx-ui:/etc/nginx-ui \
-v /var/run/docker.sock:/var/run/docker.sock \
-p 8080:80 -p 8443:443 \
uozi/nginx-ui:latest
.
.
.
{
"logrotate": {
"enabled": true,
"cmd": "logrotate /etc/logrotate.d/nginx",
"interval": -1
}
}
.
.
.
This is a High-availability vulnerability (CWE-20: Improper Input Validation). Any authenticated user with access to settings can permanently hang the service.
A patched version of nginx-ui is available at https://github.com/0xJacky/nginx-ui/releases/tag/v2.3.4.
Running one of these products? Scan your site to see whether it exposes a vulnerable version.
Scan my site free