Publish Advisories

GHSA-3vcg-j39x-cwfm GHSA-7cx3-6m66-7c5m
2026-05-22 18:04:22 -07:00 · 2025-05-16 14:13:59 +00:00
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+{
+  "schema_version": "1.4.0",
+  "id": "GHSA-3vcg-j39x-cwfm",
+  "modified": "2025-05-16T14:13:29Z",
+  "published": "2025-05-16T14:13:29Z",
+  "aliases": [
+    "CVE-2025-47774"
+  ],
+  "summary": "Vyper's `slice()` may elide side-effects when output length is 0",
+  "details": "### Impact\nthe `slice()` builtin can elide side effects when the output length is 0, and the source bytestring is a builtin (`msg.data` or `<address>.code`). the reason is that for these source locations, the check that `length >= 1` is skipped:\nhttps://github.com/vyperlang/vyper/blob/68b68c4b30c5ef2f312b4674676170b8a6eaa316/vyper/builtins/functions.py#L315-L319\n\nthe result is that a 0-length bytestring constructed with slice can be passed to `make_byte_array_copier`, which elides evaluation of its source argument when the max length is 0:\nhttps://github.com/vyperlang/vyper/blob/68b68c4b30c5ef2f312b4674676170b8a6eaa316/vyper/codegen/core.py#L189-L191\n\nthe impact is that side effects in the `start` argument may be elided when the `length` argument is 0, e.g. `slice(msg.data, self.do_side_effect(), 0)`.\n\nthe following example illustrates how the issue would look in user code\n```vyper\ncounter: public(uint256)\n\n@external\ndef test() -> Bytes[10]:\n    b: Bytes[10] = slice(msg.data, self.side_effect(), 0)\n    return b\n\ndef side_effect() -> uint256:\n    self.counter += 1\n    return 0\n```\n\nthe severity assigned is low, since this is not a very useful pattern and unlikely to be found in user code.\n\n### Patches\n\nthe fix is tracked in https://github.com/vyperlang/vyper/pull/4645, which disallows any invocation of `slice()` with length 0, including for the ad hoc locations discussed in this advisory.\n\n### Workarounds\n_Is there a way for users to fix or remediate the vulnerability without upgrading?_\n\n### References\n_Are there any links users can visit to find out more?_",
+  "severity": [
+    {
+      "type": "CVSS_V4",
+      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P"
+    }
+  ],
+  "affected": [
+    {
+      "package": {
+        "ecosystem": "PyPI",
+        "name": "vyper"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "0"
+            },
+            {
+              "last_affected": "0.4.2rc1"
+            }
+          ]
+        }
+      ]
+    }
+  ],
+  "references": [
+    {
+      "type": "WEB",
+      "url": "https://github.com/vyperlang/vyper/security/advisories/GHSA-3vcg-j39x-cwfm"
+    },
+    {
+      "type": "ADVISORY",
+      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-47774"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/vyperlang/vyper/pull/4645"
+    },
+    {
+      "type": "PACKAGE",
+      "url": "https://github.com/vyperlang/vyper"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/vyperlang/vyper/blob/68b68c4b30c5ef2f312b4674676170b8a6eaa316/vyper/builtins/functions.py#L315-L319"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/vyperlang/vyper/blob/68b68c4b30c5ef2f312b4674676170b8a6eaa316/vyper/codegen/core.py#L189-L191"
+    }
+  ],
+  "database_specific": {
+    "cwe_ids": [
+      "CWE-691"
+    ],
+    "severity": "LOW",
+    "github_reviewed": true,
+    "github_reviewed_at": "2025-05-16T14:13:29Z",
+    "nvd_published_at": "2025-05-15T18:15:38Z"
+  }
+}
@@ -0,0 +1,65 @@
+{
+  "schema_version": "1.4.0",
+  "id": "GHSA-7cx3-6m66-7c5m",
+  "modified": "2025-05-16T14:12:40Z",
+  "published": "2025-05-16T14:12:40Z",
+  "aliases": [
+    "CVE-2025-47287"
+  ],
+  "summary": "Tornado vulnerable to excessive logging caused by malformed multipart form data",
+  "details": "### Summary\n\nWhen Tornado's ``multipart/form-data`` parser encounters certain errors, it logs a warning but continues trying to parse the remainder of the data. This allows remote attackers to generate an extremely high volume of logs, constituting a DoS attack. This DoS is compounded by the fact that the logging subsystem is synchronous.\n\n### Affected versions\n\nAll versions of Tornado prior to 6.5.0 are affected. The vulnerable parser is enabled by default.\n\n### Solution\n\nUpgrade to Tornado version 6.5. In the meantime, risk can be mitigated by blocking `Content-Type: multipart/form-data` in a proxy.",
+  "severity": [
+    {
+      "type": "CVSS_V3",
+      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
+    }
+  ],
+  "affected": [
+    {
+      "package": {
+        "ecosystem": "PyPI",
+        "name": "tornado"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "0"
+            },
+            {
+              "fixed": "6.5.0"
+            }
+          ]
+        }
+      ]
+    }
+  ],
+  "references": [
+    {
+      "type": "WEB",
+      "url": "https://github.com/tornadoweb/tornado/security/advisories/GHSA-7cx3-6m66-7c5m"
+    },
+    {
+      "type": "ADVISORY",
+      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-47287"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/tornadoweb/tornado/commit/b39b892bf78fe8fea01dd45199aa88307e7162f3"
+    },
+    {
+      "type": "PACKAGE",
+      "url": "https://github.com/tornadoweb/tornado"
+    }
+  ],
+  "database_specific": {
+    "cwe_ids": [
+      "CWE-770"
+    ],
+    "severity": "HIGH",
+    "github_reviewed": true,
+    "github_reviewed_at": "2025-05-16T14:12:40Z",
+    "nvd_published_at": "2025-05-15T22:15:18Z"
+  }
+}