ubuntu-cve-2024-3651
Vulnerability from osv_ubuntu
Published
2024-04-23 00:00
Modified
2025-09-24 05:05
Summary
Details

A vulnerability was identified in the kjd/idna library, specifically within the idna.encode() function, affecting version 3.6. The issue arises from the function's handling of crafted input strings, which can lead to quadratic complexity and consequently, a denial of service condition. This vulnerability is triggered by a crafted input that causes the idna.encode() function to process the input with considerable computational load, significantly increasing the processing time in a quadratic manner relative to the input size.

Severity
6.2 (Medium)
CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "pypy-idna",
            "binary_version": "2.0-3ubuntu0.1~esm1"
          },
          {
            "binary_name": "python-idna",
            "binary_version": "2.0-3ubuntu0.1~esm1"
          },
          {
            "binary_name": "python3-idna",
            "binary_version": "2.0-3ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "python-idna",
        "purl": "pkg:deb/ubuntu/python-idna@2.0-3ubuntu0.1~esm1?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.0-3ubuntu0.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.0-3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "python-pip",
            "binary_version": "8.1.1-2ubuntu0.6+esm8"
          },
          {
            "binary_name": "python-pip-whl",
            "binary_version": "8.1.1-2ubuntu0.6+esm8"
          },
          {
            "binary_name": "python3-pip",
            "binary_version": "8.1.1-2ubuntu0.6+esm8"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "python-pip",
        "purl": "pkg:deb/ubuntu/python-pip@8.1.1-2ubuntu0.6+esm8?arch=source\u0026distro=esm-apps/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8.1.1-2ubuntu0.6+esm8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.5.6-7ubuntu1",
        "1.5.6-7ubuntu2",
        "8.0.2-7",
        "8.0.3-1",
        "8.0.3-2",
        "8.1.0-1",
        "8.1.0-2",
        "8.1.1-1",
        "8.1.1-2",
        "8.1.1-2ubuntu0.1",
        "8.1.1-2ubuntu0.2",
        "8.1.1-2ubuntu0.4",
        "8.1.1-2ubuntu0.6",
        "8.1.1-2ubuntu0.6+esm2",
        "8.1.1-2ubuntu0.6+esm3",
        "8.1.1-2ubuntu0.6+esm4",
        "8.1.1-2ubuntu0.6+esm5",
        "8.1.1-2ubuntu0.6+esm6"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "pypy-idna",
            "binary_version": "2.6-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "python-idna",
            "binary_version": "2.6-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "python3-idna",
            "binary_version": "2.6-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "python-idna",
        "purl": "pkg:deb/ubuntu/python-idna@2.6-1ubuntu0.1~esm1?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.6-1ubuntu0.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.5-1",
        "2.6-1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "python-pip",
            "binary_version": "9.0.1-2.3~ubuntu1.18.04.8+esm4"
          },
          {
            "binary_name": "python-pip-whl",
            "binary_version": "9.0.1-2.3~ubuntu1.18.04.8+esm4"
          },
          {
            "binary_name": "python3-pip",
            "binary_version": "9.0.1-2.3~ubuntu1.18.04.8+esm4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "python-pip",
        "purl": "pkg:deb/ubuntu/python-pip@9.0.1-2.3~ubuntu1.18.04.8+esm4?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9.0.1-2.3~ubuntu1.18.04.8+esm4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "9.0.1-2",
        "9.0.1-2.3~ubuntu1",
        "9.0.1-2.3~ubuntu1.18.04.1",
        "9.0.1-2.3~ubuntu1.18.04.2",
        "9.0.1-2.3~ubuntu1.18.04.3",
        "9.0.1-2.3~ubuntu1.18.04.4",
        "9.0.1-2.3~ubuntu1.18.04.5",
        "9.0.1-2.3~ubuntu1.18.04.5+esm2",
        "9.0.1-2.3~ubuntu1.18.04.5+esm3",
        "9.0.1-2.3~ubuntu1.18.04.6",
        "9.0.1-2.3~ubuntu1.18.04.6+esm1",
        "9.0.1-2.3~ubuntu1.18.04.7",
        "9.0.1-2.3~ubuntu1.18.04.7+esm1",
        "9.0.1-2.3~ubuntu1.18.04.8",
        "9.0.1-2.3~ubuntu1.18.04.8+esm1",
        "9.0.1-2.3~ubuntu1.18.04.8+esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "python-idna",
            "binary_version": "2.8-1ubuntu0.1"
          },
          {
            "binary_name": "python3-idna",
            "binary_version": "2.8-1ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "python-idna",
        "purl": "pkg:deb/ubuntu/python-idna@2.8-1ubuntu0.1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.8-1ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.6-2",
        "2.6-2build1",
        "2.8-1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "python-pip-whl",
            "binary_version": "20.0.2-5ubuntu1.10+esm2"
          },
          {
            "binary_name": "python3-pip",
            "binary_version": "20.0.2-5ubuntu1.10+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "python-pip",
        "purl": "pkg:deb/ubuntu/python-pip@20.0.2-5ubuntu1.10+esm2?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "20.0.2-5ubuntu1.10+esm2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "18.1-5",
        "18.1-5build1",
        "18.1-5ubuntu1",
        "20.0.2-2",
        "20.0.2-4",
        "20.0.2-5",
        "20.0.2-5ubuntu1",
        "20.0.2-5ubuntu1.1",
        "20.0.2-5ubuntu1.3",
        "20.0.2-5ubuntu1.4",
        "20.0.2-5ubuntu1.5",
        "20.0.2-5ubuntu1.6",
        "20.0.2-5ubuntu1.7",
        "20.0.2-5ubuntu1.8",
        "20.0.2-5ubuntu1.9",
        "20.0.2-5ubuntu1.10"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "python3-idna",
            "binary_version": "3.3-1ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "python-idna",
        "purl": "pkg:deb/ubuntu/python-idna@3.3-1ubuntu0.1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.3-1ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.10-1",
        "3.2-2",
        "3.3-1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "python3-pip",
            "binary_version": "22.0.2+dfsg-1ubuntu0.7"
          },
          {
            "binary_name": "python3-pip-whl",
            "binary_version": "22.0.2+dfsg-1ubuntu0.7"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "python-pip",
        "purl": "pkg:deb/ubuntu/python-pip@22.0.2+dfsg-1ubuntu0.7?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "22.0.2+dfsg-1ubuntu0.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "20.3.4-4",
        "21.3.1+dfsg-3",
        "22.0.2+dfsg-1",
        "22.0.2+dfsg-1ubuntu0.1",
        "22.0.2+dfsg-1ubuntu0.2",
        "22.0.2+dfsg-1ubuntu0.3",
        "22.0.2+dfsg-1ubuntu0.4",
        "22.0.2+dfsg-1ubuntu0.5",
        "22.0.2+dfsg-1ubuntu0.6"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "python3-idna",
            "binary_version": "3.6-2ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "python-idna",
        "purl": "pkg:deb/ubuntu/python-idna@3.6-2ubuntu0.1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.6-2ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.3-2",
        "3.6-2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "python3-pip",
            "binary_version": "24.0+dfsg-1ubuntu1.3"
          },
          {
            "binary_name": "python3-pip-whl",
            "binary_version": "24.0+dfsg-1ubuntu1.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "python-pip",
        "purl": "pkg:deb/ubuntu/python-pip@24.0+dfsg-1ubuntu1.3?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "24.0+dfsg-1ubuntu1.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "23.2+dfsg-1",
        "23.3+dfsg-1",
        "24.0+dfsg-1",
        "24.0+dfsg-1ubuntu1",
        "24.0+dfsg-1ubuntu1.1",
        "24.0+dfsg-1ubuntu1.2"
      ]
    }
  ],
  "aliases": [],
  "details": "A vulnerability was identified in the kjd/idna library, specifically within the `idna.encode()` function, affecting version 3.6. The issue arises from the function\u0027s handling of crafted input strings, which can lead to quadratic complexity and consequently, a denial of service condition. This vulnerability is triggered by a crafted input that causes the `idna.encode()` function to process the input with considerable computational load, significantly increasing the processing time in a quadratic manner relative to the input size.",
  "id": "UBUNTU-CVE-2024-3651",
  "modified": "2025-09-24T05:05:08Z",
  "published": "2024-04-23T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2024-3651"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-3651"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/kjd/idna/security/advisories/GHSA-jjg7-2v4v-x38h"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6780-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-7762-1"
    }
  ],
  "related": [
    "USN-6780-1",
    "USN-7762-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2024-3651"
  ]
}



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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.

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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.
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  • 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.


Detection rules are retrieved from Rulezet.