gsd-2020-13757
Vulnerability from gsd
Modified
2023-12-13 01:21
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).
Aliases
Aliases
CVE-2020-13757


To clipboard 

{
  "GSD": {
    "alias": "CVE-2020-13757",
    "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).",
    "id": "GSD-2020-13757",
    "references": [
      "https://www.suse.com/security/cve/CVE-2020-13757.html",
      "https://access.redhat.com/errata/RHSA-2020:3541",
      "https://access.redhat.com/errata/RHSA-2020:3453",
      "https://ubuntu.com/security/CVE-2020-13757",
      "https://advisories.mageia.org/CVE-2020-13757.html",
      "https://alas.aws.amazon.com/cve/html/CVE-2020-13757.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2020-13757"
      ],
      "details": "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).",
      "id": "GSD-2020-13757",
      "modified": "2023-12-13T01:21:46.846099Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
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      "CVE_data_meta": {
        "ASSIGNER": "cve@mitre.org",
        "ID": "CVE-2020-13757",
        "STATE": "PUBLIC"
      },
      "affects": {
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          "vendor_data": [
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              "product": {
                "product_data": [
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                    "version": {
                      "version_data": [
                        {
                          "version_value": "n/a"
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            "value": "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)."
          }
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      },
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      },
      "references": {
        "reference_data": [
          {
            "name": "https://github.com/sybrenstuvel/python-rsa/issues/146",
            "refsource": "MISC",
            "url": "https://github.com/sybrenstuvel/python-rsa/issues/146"
          },
          {
            "name": "https://github.com/sybrenstuvel/python-rsa/issues/146#issuecomment-641845667",
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            "url": "https://github.com/sybrenstuvel/python-rsa/issues/146#issuecomment-641845667"
          },
          {
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            "refsource": "FEDORA",
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          },
          {
            "name": "FEDORA-2020-5ed5627d2b",
            "refsource": "FEDORA",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZYB65VNILRBTXL6EITQTH2PZPK7I23MW/"
          },
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            "url": "https://usn.ubuntu.com/4478-1/"
          }
        ]
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    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "==4.0",
          "affected_versions": "Version 4.0",
          "cvss_v2": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "cwe_ids": [
            "CWE-1035",
            "CWE-327",
            "CWE-937"
          ],
          "date": "2020-09-02",
          "description": "Python-RSA 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).",
          "fixed_versions": [
            "4.1"
          ],
          "identifier": "CVE-2020-13757",
          "identifiers": [
            "CVE-2020-13757"
          ],
          "not_impacted": "All versions before 4.0, all versions after 4.0",
          "package_slug": "pypi/rsa",
          "pubdate": "2020-06-01",
          "solution": "Upgrade to version 4.1 or above.",
          "title": "Use of a Broken or Risky Cryptographic Algorithm",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2020-13757"
          ],
          "uuid": "c85bca57-da82-4958-915f-195da9baf28c"
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:python-rsa_project:python-rsa:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "4.1",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          },
          {
            "children": [],
            "cpe_match": [
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                "cpe_name": [],
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              {
                "cpe23Uri": "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*",
                "cpe_name": [],
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            ],
            "operator": "OR"
          },
          {
            "children": [],
            "cpe_match": [
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                "cpe_name": [],
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
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          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2020-13757"
        },
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        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
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              "value": "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)."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-327"
                }
              ]
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          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/sybrenstuvel/python-rsa/issues/146",
              "refsource": "MISC",
              "tags": [
                "Issue Tracking",
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              ],
              "url": "https://github.com/sybrenstuvel/python-rsa/issues/146"
            },
            {
              "name": "https://github.com/sybrenstuvel/python-rsa/issues/146#issuecomment-641845667",
              "refsource": "CONFIRM",
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              ],
              "url": "https://github.com/sybrenstuvel/python-rsa/issues/146#issuecomment-641845667"
            },
            {
              "name": "FEDORA-2020-253ebe55ff",
              "refsource": "FEDORA",
              "tags": [
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                "Third Party Advisory"
              ],
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2KILTHBHNSDUCYV22ODLOKTICJJ7JQIQ/"
            },
            {
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                "Mailing List",
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            },
            {
              "name": "USN-4478-1",
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          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 5.0,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "NONE",
            "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
            "version": "2.0"
          },
          "exploitabilityScore": 10.0,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2023-03-01T03:09Z",
      "publishedDate": "2020-06-01T19:15Z"
    }
  }
}


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