FKIE_CVE-2019-15795

Vulnerability from fkie_nvd - Published: 2020-03-26 13:15 - Updated: 2026-06-17 02:21
Summary
python-apt only checks the MD5 sums of downloaded files in `Version.fetch_binary()` and `Version.fetch_source()` of apt/package.py in version 1.9.0ubuntu1 and earlier. This allows a man-in-the-middle attack which could potentially be used to install altered packages and has been fixed in versions 1.9.0ubuntu1.2, 1.6.5ubuntu0.1, 1.1.0~beta1ubuntu0.16.04.7, 0.9.3.5ubuntu3+esm2, and 0.8.3ubuntu7.5.
Impacted products
Vendor Product Version
ubuntu python-apt 0.8.0
ubuntu python-apt 0.8.1
ubuntu python-apt 0.8.3
ubuntu python-apt 0.8.3
ubuntu python-apt 0.8.3
ubuntu python-apt 0.8.3
ubuntu python-apt 0.8.3
ubuntu python-apt 0.8.3
ubuntu python-apt 0.8.3
ubuntu python-apt 0.8.3
ubuntu python-apt 0.8.3
ubuntu python-apt 0.8.3
canonical ubuntu_linux 12.04
ubuntu python-apt 0.8.9.1
ubuntu python-apt 0.8.9.1
ubuntu python-apt 0.9.0
ubuntu python-apt 0.9.1
ubuntu python-apt 0.9.1
ubuntu python-apt 0.9.1
ubuntu python-apt 0.9.1
ubuntu python-apt 0.9.3.1
ubuntu python-apt 0.9.3.2
ubuntu python-apt 0.9.3.2
ubuntu python-apt 0.9.3.2
ubuntu python-apt 0.9.3.3
ubuntu python-apt 0.9.3.3
ubuntu python-apt 0.9.3.4
ubuntu python-apt 0.9.3.4
ubuntu python-apt 0.9.3.5
ubuntu python-apt 0.9.3.5
ubuntu python-apt 0.9.3.5
ubuntu python-apt 0.9.3.5
canonical ubuntu_linux 14.04
ubuntu python-apt 1.0.1
ubuntu python-apt 1.0.1
ubuntu python-apt 1.0.1
ubuntu python-apt 1.1.0
ubuntu python-apt 1.1.0
ubuntu python-apt 1.1.0
ubuntu python-apt 1.1.0
ubuntu python-apt 1.1.0
ubuntu python-apt 1.1.0
ubuntu python-apt 1.1.0
canonical ubuntu_linux 16.04
debian python-apt 1.8.4
ubuntu python-apt 1.4.0
ubuntu python-apt 1.4.0
ubuntu python-apt 1.4.0
ubuntu python-apt 1.6.0
ubuntu python-apt 1.6.0
ubuntu python-apt 1.6.0
ubuntu python-apt 1.6.0
ubuntu python-apt 1.6.0
ubuntu python-apt 1.6.1
ubuntu python-apt 1.6.2
ubuntu python-apt 1.6.3
ubuntu python-apt 1.6.3
ubuntu python-apt 1.6.4
ubuntu python-apt 1.8.4
canonical ubuntu_linux 18.04
ubuntu python-apt 1.8.4
ubuntu python-apt 1.9.0
ubuntu python-apt 1.9.0
ubuntu python-apt 1.9.0
canonical ubuntu_linux 19.10
ubuntu python-apt 1.7.0
ubuntu python-apt 1.8.0
ubuntu python-apt 1.8.0
ubuntu python-apt 1.8.0
ubuntu python-apt 1.8.1
ubuntu python-apt 1.8.2
ubuntu python-apt 1.8.3
ubuntu python-apt 1.8.4
canonical ubuntu_linux 19.04

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              "matchCriteriaId": "1BC6ADE4-D2AB-424F-A63D-57840016D6F2",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:ubuntu:python-apt:1.8.0:alpha0\\~ubuntu2:*:*:*:*:*:*",
              "matchCriteriaId": "1BBD93FF-57C9-488E-8C11-CFA8EC1C5345",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:ubuntu:python-apt:1.8.1:*:*:*:*:*:*:*",
              "matchCriteriaId": "1C378E5B-9AF4-436C-BAE6-1A009F5D490E",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:ubuntu:python-apt:1.8.2:*:*:*:*:*:*:*",
              "matchCriteriaId": "6726FF84-F4DF-47A9-910B-9288D57A22BA",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:ubuntu:python-apt:1.8.3:*:*:*:*:*:*:*",
              "matchCriteriaId": "FAC0AE27-85A4-4F6C-80E3-08A6B45F267C",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:ubuntu:python-apt:1.8.4:*:*:*:*:*:*:*",
              "matchCriteriaId": "EE146221-82F3-4CDE-A713-6A3FA6742F71",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*",
              "matchCriteriaId": "CD783B0C-9246-47D9-A937-6144FE8BFF0F",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "python-apt only checks the MD5 sums of downloaded files in `Version.fetch_binary()` and `Version.fetch_source()` of apt/package.py in version 1.9.0ubuntu1 and earlier. This allows a man-in-the-middle attack which could potentially be used to install altered packages and has been fixed in versions 1.9.0ubuntu1.2, 1.6.5ubuntu0.1, 1.1.0~beta1ubuntu0.16.04.7, 0.9.3.5ubuntu3+esm2, and 0.8.3ubuntu7.5."
    },
    {
      "lang": "es",
      "value": "Python-apt solo comprueba las cantidades MD5 de los archivos descargados en las funciones \"Version.fetch_binary()\" y \"Version.fetch_source()\" del archivo apt/package.py en la versi\u00f3n 1.9.0ubuntu1 y anteriores. Esto permite un ataque de tipo man-in-the-middle que podr\u00eda ser usado para instalar paquetes alterados y ha sido corregido en las versiones 1.9.0ubuntu1.2, 1.6.5ubuntu0.1, 1.1.0~beta1ubuntu0.16.04.7, 0.9. 3.5ubuntu3+esm2, y 0.8.3ubuntu7.5."
    }
  ],
  "id": "CVE-2019-15795",
  "lastModified": "2026-06-17T02:21:05.490",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "LOW",
        "cvssData": {
          "accessComplexity": "HIGH",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 2.6,
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:H/Au:N/C:N/I:P/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 4.9,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.7,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 2.7,
        "source": "security@ubuntu.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.7,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 2.7,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2020-03-26T13:15:12.750",
  "references": [
    {
      "source": "security@ubuntu.com",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://usn.ubuntu.com/4247-1/"
    },
    {
      "source": "security@ubuntu.com",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://usn.ubuntu.com/4247-3/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://usn.ubuntu.com/4247-1/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://usn.ubuntu.com/4247-3/"
    }
  ],
  "sourceIdentifier": "security@ubuntu.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-327"
        }
      ],
      "source": "security@ubuntu.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-327"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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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.

Sightings

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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.
  • 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.

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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