ghsa-537h-rv9q-vvph
Vulnerability from github
Published
2021-03-24 18:24
Modified
2024-10-21 21:54
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Summary
Python-RSA decryption of ciphertext leads to DoS
Details

Python-RSA before 4.1 ignores leading '\0' 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).

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{
   affected: [
      {
         package: {
            ecosystem: "PyPI",
            name: "rsa",
         },
         ranges: [
            {
               events: [
                  {
                     introduced: "0",
                  },
                  {
                     fixed: "4.1",
                  },
               ],
               type: "ECOSYSTEM",
            },
         ],
      },
   ],
   aliases: [
      "CVE-2020-13757",
   ],
   database_specific: {
      cwe_ids: [
         "CWE-327",
      ],
      github_reviewed: true,
      github_reviewed_at: "2021-03-24T18:24:28Z",
      nvd_published_at: "2020-06-01T19:15:00Z",
      severity: "HIGH",
   },
   details: "Python-RSA before 4.1 ignores leading '\\0' 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).",
   id: "GHSA-537h-rv9q-vvph",
   modified: "2024-10-21T21:54:27Z",
   published: "2021-03-24T18:24:39Z",
   references: [
      {
         type: "ADVISORY",
         url: "https://nvd.nist.gov/vuln/detail/CVE-2020-13757",
      },
      {
         type: "WEB",
         url: "https://github.com/sybrenstuvel/python-rsa/issues/146",
      },
      {
         type: "WEB",
         url: "https://github.com/sybrenstuvel/python-rsa/issues/146#issuecomment-641845667",
      },
      {
         type: "WEB",
         url: "https://github.com/pypa/advisory-database/tree/main/vulns/rsa/PYSEC-2020-99.yaml",
      },
      {
         type: "PACKAGE",
         url: "https://github.com/sybrenstuvel/python-rsa",
      },
      {
         type: "WEB",
         url: "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2KILTHBHNSDUCYV22ODLOKTICJJ7JQIQ",
      },
      {
         type: "WEB",
         url: "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZYB65VNILRBTXL6EITQTH2PZPK7I23MW",
      },
      {
         type: "WEB",
         url: "https://usn.ubuntu.com/4478-1",
      },
   ],
   schema_version: "1.4.0",
   severity: [
      {
         score: "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
         type: "CVSS_V3",
      },
   ],
   summary: "Python-RSA decryption of ciphertext leads to DoS",
}


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