{
  "cveId": "CVE-2020-13757",
  "url": "https://patchblox.com/security/cve/CVE-2020-13757",
  "summary": "CVE-2020-13757 is fixed in 2 products on 1 platform, first by python-rsa 3.4.2-1ubuntu0.1~esm1, released June 1, 2020. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "python3-rsa: Python-RSA before 4.1 ignores leading \u0027\\0\u0027 bytes during decryption of ciphertext",
  "description": "Python-RSA before 4.1 ignores leading \u0027\\0\u0027 bytes during decryption of ciphertext. This could conceivably have a security-relevant impact, e.g., by helping an attacker to infer that an application uses Python-RSA, or if the length of accepted ciphertext affects application behavior (such as by causing excessive memory allocation).",
  "published": "2020-06-01T12:15:00Z",
  "severity": "Medium",
  "epss": 0.01421,
  "epssPercentile": 0.72996,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "python-rsa",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "3.4.2-1ubuntu0.1~esm1",
      "fix": "python-rsa 3.4.2-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-python-rsa-3.4.2-1ubuntu0.1-esm1",
      "released": "2020-06-01T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-rsa",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "3.4.2-1ubuntu0.1~esm1",
      "fix": "python3-rsa 3.4.2-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-python3-rsa-3.4.2-1ubuntu0.1-esm1",
      "released": "2020-06-01T12:15:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}