From 37866e3bd0dcdf002437e65c1a22ba1d4821ce0b Mon Sep 17 00:00:00 2001
From: "advisory-database[bot]"
 <45398580+advisory-database[bot]@users.noreply.github.com>
Date: Wed, 4 Jun 2025 21:20:19 +0000
Subject: [PATCH] Publish GHSA-7w8p-chxq-2789

---
 .../GHSA-7w8p-chxq-2789.json                  | 115 ++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 advisories/github-reviewed/2025/06/GHSA-7w8p-chxq-2789/GHSA-7w8p-chxq-2789.json

diff --git a/advisories/github-reviewed/2025/06/GHSA-7w8p-chxq-2789/GHSA-7w8p-chxq-2789.json b/advisories/github-reviewed/2025/06/GHSA-7w8p-chxq-2789/GHSA-7w8p-chxq-2789.json
new file mode 100644
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@@ -0,0 +1,115 @@
+{
+  "schema_version": "1.4.0",
+  "id": "GHSA-7w8p-chxq-2789",
+  "modified": "2025-06-04T21:18:18Z",
+  "published": "2025-06-04T21:18:18Z",
+  "aliases": [
+    "CVE-2025-48934"
+  ],
+  "summary": "Deno.env.toObject() ignores the variables listed in --deny-env and returns all environment variables",
+  "details": "### Summary\nThe [Deno.env.toObject](https://docs.deno.com/api/deno/~/Deno.Env.toObject) method ignores any variables listed in the `--deny-env` option of the `deno run` command. When looking at the [documentation](https://docs.deno.com/runtime/fundamentals/security/#environment-variables) of the `--deny-env` option this might lead to a false impression that variables listed in the option are impossible to read.\n\n### PoC\n\n```\nexport AWS_SECRET_ACCESS_KEY=my-secret-aws-key\n\n# Works as expected. The program stops with a \"NotCapable\" error message\necho 'console.log(Deno.env.get(\"AWS_SECRET_ACCESS_KEY\"));' | deno run \\\n  --allow-env \\\n  --deny-env=AWS_ACCESS_KEY_ID,AWS_SECRET_ACCESS_KEY -\n\n# All enviroment variables are printed and the --deny-env list is completely disregarded\necho 'console.log(Deno.env.toObject());' | deno run \\\n  --allow-env \\\n  --deny-env=AWS_ACCESS_KEY_ID,AWS_SECRET_ACCESS_KEY -\n```\n\nThe first example using `get` exits with the following error:\n```\nerror: Uncaught (in promise) NotCapable: Requires env access to \"AWS_SECRET_ACCESS_KEY\", run again with the --allow-env flag\nconsole.log(Deno.env.get(\"AWS_SECRET_ACCESS_KEY\"));\n                     ^\n    at Object.getEnv [as get] (ext:deno_os/30_os.js:124:10)\n    at file:///$deno$stdin.mts:1:22\n```\n\nThe second example  using `toObject` prints all environment variables:\n```\n[Object: null prototype] {\n  ...\n  AWS_SECRET_ACCESS_KEY: \"my-secret-aws-key\",\n  ...\n}\n```\n\n### Impact\nSoftware relying on the combination of both flags to allow access to most environment variables except a few sensitive ones will be vulnerable to malicious code trying to steal secrets using the Deno.env.toObject() method.",
+  "severity": [
+    {
+      "type": "CVSS_V4",
+      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:P"
+    }
+  ],
+  "affected": [
+    {
+      "package": {
+        "ecosystem": "crates.io",
+        "name": "deno"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "0"
+            },
+            {
+              "fixed": "2.1.13"
+            }
+          ]
+        }
+      ]
+    },
+    {
+      "package": {
+        "ecosystem": "crates.io",
+        "name": "deno"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "2.2.0"
+            },
+            {
+              "fixed": "2.2.13"
+            }
+          ]
+        }
+      ]
+    },
+    {
+      "package": {
+        "ecosystem": "crates.io",
+        "name": "deno_runtime"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "0"
+            },
+            {
+              "fixed": "0.212.0"
+            }
+          ]
+        }
+      ]
+    }
+  ],
+  "references": [
+    {
+      "type": "WEB",
+      "url": "https://github.com/denoland/deno/security/advisories/GHSA-7w8p-chxq-2789"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/denoland/deno/pull/29079"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/denoland/deno/commit/2959e083912420988066a001c2b2d6732a1b562f"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/denoland/deno/commit/946ccda1aa19a00c478a5e6826b75053b050d753"
+    },
+    {
+      "type": "WEB",
+      "url": "https://docs.deno.com/api/deno/~/Deno.Env.toObject"
+    },
+    {
+      "type": "WEB",
+      "url": "https://docs.deno.com/runtime/fundamentals/security/#environment-variables"
+    },
+    {
+      "type": "PACKAGE",
+      "url": "https://github.com/denoland/deno"
+    }
+  ],
+  "database_specific": {
+    "cwe_ids": [
+      "CWE-201"
+    ],
+    "severity": "MODERATE",
+    "github_reviewed": true,
+    "github_reviewed_at": "2025-06-04T21:18:18Z",
+    "nvd_published_at": null
+  }
+}
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