GHSA-J48Q-4C78-RHF9

Vulnerability from github – Published: 2026-03-31 23:31 – Updated: 2026-03-31 23:31
VLAI
Summary
openssl-encrypt: Dynamic .so loading for Whirlpool uses broad glob pattern without integrity verification
Details

Severity: HIGH

Summary

The Whirlpool hash implementation in openssl_encrypt/modules/registry/hash_registry.py at lines 570-589 uses glob patterns to find .so modules in site-packages and loads the first match via importlib without verifying module integrity.

Affected Code

for site_pkg in site.getsitepackages():
    pattern = os.path.join(site_pkg, "whirlpool*py313*.so")
    py313_modules = glob.glob(pattern)
    if py313_modules:
        module_path = py313_modules[0]  # Takes first match
        loader = ExtensionFileLoader("whirlpool", module_path)
        spec = importlib.util.spec_from_file_location("whirlpool", module_path, loader=loader)
        whirlpool_module = importlib.util.module_from_spec(spec)
        spec.loader.exec_module(whirlpool_module)

Impact

The glob pattern "whirlpool*py313*.so" is broad and takes the first match without verifying: - File hash/signature - File ownership/permissions - Whether it's a legitimate module

If an attacker can place a malicious .so file matching this pattern in any site-packages directory, it will be loaded and native code executed.

Recommended Fix

  • Verify the module's integrity (hash or signature) before loading
  • Use a specific filename rather than a glob pattern
  • Check file permissions and ownership

Fix

Fixed in commit 963d0d1 on branch releases/1.4.x — added os.path.realpath() to resolve symlinks and validation that found .so files are within known site-packages directories before loading.

Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "openssl-encrypt"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.4.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-427"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-31T23:31:29Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "## Severity: HIGH\n\n### Summary\n\nThe Whirlpool hash implementation in `openssl_encrypt/modules/registry/hash_registry.py` at **lines 570-589** uses glob patterns to find `.so` modules in site-packages and loads the first match via `importlib` without verifying module integrity.\n\n### Affected Code\n\n```python\nfor site_pkg in site.getsitepackages():\n    pattern = os.path.join(site_pkg, \"whirlpool*py313*.so\")\n    py313_modules = glob.glob(pattern)\n    if py313_modules:\n        module_path = py313_modules[0]  # Takes first match\n        loader = ExtensionFileLoader(\"whirlpool\", module_path)\n        spec = importlib.util.spec_from_file_location(\"whirlpool\", module_path, loader=loader)\n        whirlpool_module = importlib.util.module_from_spec(spec)\n        spec.loader.exec_module(whirlpool_module)\n```\n\n### Impact\n\nThe glob pattern `\"whirlpool*py313*.so\"` is broad and takes the first match without verifying:\n- File hash/signature\n- File ownership/permissions\n- Whether it\u0027s a legitimate module\n\nIf an attacker can place a malicious `.so` file matching this pattern in any site-packages directory, it will be loaded and native code executed.\n\n### Recommended Fix\n\n- Verify the module\u0027s integrity (hash or signature) before loading\n- Use a specific filename rather than a glob pattern\n- Check file permissions and ownership\n\n### Fix\n\nFixed in commit `963d0d1` on branch `releases/1.4.x` \u2014 added os.path.realpath() to resolve symlinks and validation that found .so files are within known site-packages directories before loading.",
  "id": "GHSA-j48q-4c78-rhf9",
  "modified": "2026-03-31T23:31:29Z",
  "published": "2026-03-31T23:31:29Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-j48q-4c78-rhf9"
    },
    {
      "type": "WEB",
      "url": "https://github.com/jahlives/openssl_encrypt/commit/963d0d1278b722ea134272f9df65fddcd3e6ab47"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/jahlives/openssl_encrypt"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U",
      "type": "CVSS_V4"
    }
  ],
  "summary": "openssl-encrypt: Dynamic .so loading for Whirlpool uses broad glob pattern without integrity verification"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Loading…

Detection rules are retrieved from Rulezet.

Loading…

Loading…