Publish GHSA-cp8r-8jvw-v3qg

Author: advisory-database[bot]

advisories/github-reviewed/2026/03/GHSA-cp8r-8jvw-v3qg/GHSA-cp8r-8jvw-v3qg.json

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+{
+  "schema_version": "1.4.0",
+  "id": "GHSA-cp8r-8jvw-v3qg",
+  "modified": "2026-03-30T16:38:38Z",
+  "published": "2026-03-30T16:38:38Z",
+  "aliases": [
+    "CVE-2026-33029"
+  ],
+  "summary": "nginx-ui Vulnerable to DoS via Negative Integer Input in Logrotate Interval",
+  "details": "### Summary\nAn 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.\n\n### Details\nThe 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.\n\n**Environment:**\n- OS: Kali Linux 6.17.10-1kali1 (6.17.10+kali-amd64)\n- nginx-ui version: 2.3.3 (513) e5da6dd (go1.26.0 linux/amd64)\n- Deployment: Docker container\n- Run Command: \n```\ndocker run -dit \\\n  --name=nginx-ui \\\n  --restart=always \\\n  -v /mnt/user4/appdata/nginx:/etc/nginx \\\n  -v /mnt/user4/appdata/nginx-ui:/etc/nginx-ui \\\n  -v /var/run/docker.sock:/var/run/docker.sock \\\n  -p 8080:80 -p 8443:443 \\\n  uozi/nginx-ui:latest\n```\n\n### PoC\n1. Authenticate to the nginx-ui dashboard.\n2. Send a POST request to /api/settings (using Burp Suite, Postman, or curl).\n3. Set the payload as follows:\n```\n.\n.\n.\n{\n  \"logrotate\": {\n    \"enabled\": true,\n    \"cmd\": \"logrotate /etc/logrotate.d/nginx\",\n    \"interval\": -1\n  }\n}\n.\n.\n.\n```\n4. Observe that the web server stops responding to all subsequent requests immediately after the injection.\n<img width=\"1041\" height=\"390\" alt=\"image\" src=\"https://github.com/user-attachments/assets/b746a91a-dd63-4f5e-b1a8-382b9d08e181\" />\n\n### Impact\nThis is a High-availability vulnerability (CWE-20: Improper Input Validation). Any authenticated user with access to settings can permanently hang the service.\n\nA patched version of nginx-ui  is available at https://github.com/0xJacky/nginx-ui/releases/tag/v2.3.4.",
+  "severity": [
+    {
+      "type": "CVSS_V4",
+      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
+    }
+  ],
+  "affected": [
+    {
+      "package": {
+        "ecosystem": "Go",
+        "name": "github.com/0xJacky/Nginx-UI"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "0"
+            },
+            {
+              "last_affected": "1.99"
+            }
+          ]
+        }
+      ]
+    }
+  ],
+  "references": [
+    {
+      "type": "WEB",
+      "url": "https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-cp8r-8jvw-v3qg"
+    },
+    {
+      "type": "PACKAGE",
+      "url": "https://github.com/0xJacky/nginx-ui"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/0xJacky/nginx-ui/releases/tag/v2.3.4"
+    }
+  ],
+  "database_specific": {
+    "cwe_ids": [
+      "CWE-20"
+    ],
+    "severity": "MODERATE",
+    "github_reviewed": true,
+    "github_reviewed_at": "2026-03-30T16:38:38Z",
+    "nvd_published_at": null
+  }
+}