CVE-2019-9636 (GCVE-0-2019-9636)

Vulnerability from cvelistv5 – Published: 2019-03-08 21:00 – Updated: 2024-08-04 21:54
VLAI
Summary
Python 2.7.x through 2.7.16 and 3.x through 3.7.2 is affected by: Improper Handling of Unicode Encoding (with an incorrect netloc) during NFKC normalization. The impact is: Information disclosure (credentials, cookies, etc. that are cached against a given hostname). The components are: urllib.parse.urlsplit, urllib.parse.urlparse. The attack vector is: A specially crafted URL could be incorrectly parsed to locate cookies or authentication data and send that information to a different host than when parsed correctly. This is fixed in: v2.7.17, v2.7.17rc1, v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1, v3.5.7, v3.5.8, v3.5.8rc1, v3.5.8rc2, v3.5.9; v3.6.10, v3.6.10rc1, v3.6.11, v3.6.11rc1, v3.6.12, v3.6.9, v3.6.9rc1; v3.7.3, v3.7.3rc1, v3.7.4, v3.7.4rc1, v3.7.4rc2, v3.7.5, v3.7.5rc1, v3.7.6, v3.7.6rc1, v3.7.7, v3.7.7rc1, v3.7.8, v3.7.8rc1, v3.7.9.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • n/a
Assigner
References
URL Tags
http://www.securityfocus.com/bid/107400 vdb-entryx_refsource_BID
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://access.redhat.com/errata/RHSA-2019:0710 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:0765 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:0806 vendor-advisoryx_refsource_REDHAT
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
https://access.redhat.com/errata/RHSA-2019:0902 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:0981 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:0997 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHBA-2019:0959 vendor-advisoryx_refsource_REDHAT
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://access.redhat.com/errata/RHSA-2019:1467 vendor-advisoryx_refsource_REDHAT
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
https://lists.debian.org/debian-lts-announce/2019… mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2019… mailing-listx_refsource_MLIST
https://access.redhat.com/errata/RHBA-2019:0764 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHBA-2019:0763 vendor-advisoryx_refsource_REDHAT
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
https://usn.ubuntu.com/4127-2/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4127-1/ vendor-advisoryx_refsource_UBUNTU
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://access.redhat.com/errata/RHSA-2019:2980 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:3170 vendor-advisoryx_refsource_REDHAT
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
https://security.gentoo.org/glsa/202003-26 vendor-advisoryx_refsource_GENTOO
https://www.oracle.com/security-alerts/cpujan2020.html x_refsource_MISC
https://lists.debian.org/debian-lts-announce/2020… mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2020… mailing-listx_refsource_MLIST
https://www.oracle.com/security-alerts/cpujul2022.html x_refsource_MISC
https://github.com/python/cpython/pull/12201 x_refsource_MISC
https://python-security.readthedocs.io/vuln/urlsp… x_refsource_MISC
https://bugs.python.org/issue36216 x_refsource_MISC
https://security.netapp.com/advisory/ntap-2019051… x_refsource_CONFIRM
Date Public
2019-03-08 00:00
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          "value": "Python, en las versiones 2.7.x hasta la 2.7.16 y en las 3.x hasta la 3.7.2, se ve afectado por lo siguiente: Gesti\u00f3n incorrecta de codificaci\u00f3n Unicode (con un netloc incorrecto) durante la normalizaci\u00f3n NFKC. Su impacto provoca: la divulgaci\u00f3n de informaci\u00f3n (credenciales, cookies, etc, que est\u00e9n cacheados contra un determinado nombre de host). Los componentes son los siguientes: urllib.parse.urlsplit y urllib.parse.urlparse. El vector de ataque es el siguiente: una URL especialmente manipulada puede analizarse sint\u00e1cticamente de manera incorrecta para localizar cookies o datos de autenticaci\u00f3n y enviar dicha informaci\u00f3n a un host distinto con respecto a cuando se analiza de manera correcta. Esta corregido en las versiones: v2.7.17, v2.7.17rc1, v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1, v3.5.7, v3.5.8, v3.5.8rc1, v3.5.8rc2, v3.5.9; v3.6.10, v3.6.10rc1, v3.6.11, v3.6.11rc1, v3.6.12, v3.6.9, v3.6.9rc1; v3.7.3, v3.7.3rc1, v3.7.4, v3.7.4rc1, v3.7.4rc2, v3.7.5, v3.7.5rc1, v3.7.6, v3.7.6rc1, v3.7.7, v3.7.7rc1, v3.7.8, v3.7.8rc1, v3.7.9"
        }
      ],
      "id": "CVE-2019-9636",
      "lastModified": "2024-11-21T04:52:01.183",
      "metrics": {
        "cvssMetricV2": [
          {
            "acInsufInfo": false,
            "baseSeverity": "MEDIUM",
            "cvssData": {
              "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,
            "source": "nvd@nist.gov",
            "type": "Primary",
            "userInteractionRequired": false
          }
        ],
        "cvssMetricV31": [
          {
            "cvssData": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 9.8,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            },
            "exploitabilityScore": 3.9,
            "impactScore": 5.9,
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      },
      "published": "2019-03-08T21:29:00.703",
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        "descriptions": [
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            "lang": "en",
            "value": "Python 2.7.x through 2.7.16 and 3.x through 3.7.2 is affected by: Improper Handling of Unicode Encoding (with an incorrect netloc) during NFKC normalization. The impact is: Information disclosure (credentials, cookies, etc. that are cached against a given hostname). The components are: urllib.parse.urlsplit, urllib.parse.urlparse. The attack vector is: A specially crafted URL could be incorrectly parsed to locate cookies or authentication data and send that information to a different host than when parsed correctly. This is fixed in: v2.7.17, v2.7.17rc1, v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1, v3.5.7, v3.5.8, v3.5.8rc1, v3.5.8rc2, v3.5.9; v3.6.10, v3.6.10rc1, v3.6.11, v3.6.11rc1, v3.6.12, v3.6.9, v3.6.9rc1; v3.7.3, v3.7.3rc1, v3.7.4, v3.7.4rc1, v3.7.4rc2, v3.7.5, v3.7.5rc1, v3.7.6, v3.7.6rc1, v3.7.7, v3.7.7rc1, v3.7.8, v3.7.8rc1, v3.7.9."
          },
          {
            "lang": "es",
            "value": "Python, en las versiones 2.7.x hasta la 2.7.16 y en las 3.x hasta la 3.7.2, se ve afectado por lo siguiente: Gesti\u00f3n incorrecta de codificaci\u00f3n Unicode (con un netloc incorrecto) durante la normalizaci\u00f3n NFKC. Su impacto provoca: la divulgaci\u00f3n de informaci\u00f3n (credenciales, cookies, etc, que est\u00e9n cacheados contra un determinado nombre de host). Los componentes son los siguientes: urllib.parse.urlsplit y urllib.parse.urlparse. El vector de ataque es el siguiente: una URL especialmente manipulada puede analizarse sint\u00e1cticamente de manera incorrecta para localizar cookies o datos de autenticaci\u00f3n y enviar dicha informaci\u00f3n a un host distinto con respecto a cuando se analiza de manera correcta. Esta corregido en las versiones: v2.7.17, v2.7.17rc1, v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1, v3.5.7, v3.5.8, v3.5.8rc1, v3.5.8rc2, v3.5.9; v3.6.10, v3.6.10rc1, v3.6.11, v3.6.11rc1, v3.6.12, v3.6.9, v3.6.9rc1; v3.7.3, v3.7.3rc1, v3.7.4, v3.7.4rc1, v3.7.4rc2, v3.7.5, v3.7.5rc1, v3.7.6, v3.7.6rc1, v3.7.7, v3.7.7rc1, v3.7.8, v3.7.8rc1, v3.7.9"
          }
        ],
        "id": "CVE-2019-9636",
        "lastModified": "2024-11-21T04:52:01.183",
        "metrics": {
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              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
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                "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"
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              "exploitabilityScore": 10.0,
              "impactScore": 2.9,
              "obtainAllPrivilege": false,
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              "source": "nvd@nist.gov",
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              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
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                "baseScore": 9.8,
                "baseSeverity": "CRITICAL",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
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                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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        "published": "2019-03-08T21:29:00.703",
        "references": [
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            "source": "cve@mitre.org",
            "tags": [
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            "url": "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00092.html"
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            "url": "https://python-security.readthedocs.io/vuln/urlsplit-nfkc-normalization.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://security.gentoo.org/glsa/202003-26"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20190517-0001/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://usn.ubuntu.com/4127-1/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://usn.ubuntu.com/4127-2/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://www.oracle.com/security-alerts/cpujan2020.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://www.oracle.com/security-alerts/cpujul2022.html"
          }
        ],
        "sourceIdentifier": "cve@mitre.org",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-06-28T07:30:22+00:00",
      "cve": "CVE-2019-9636",
      "id": "CVE-2019-9636",
      "initial_release_date": "2019-03-06T00:00:00+00:00",
      "product_status:fixed": "899",
      "product_status:known_affected": "1",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "python: Information Disclosure due to urlsplit improper NFKC normalization",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2019/cve-2019-9636.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-14T00:01:55Z",
      "cve": "CVE-2019-9636",
      "id": "CVE-2019-9636",
      "initial_release_date": "2023-02-15T04:14:29Z",
      "product_status:known_affected": "460",
      "product_status:recommended": "1760",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2019-9636",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2019-9636.json",
      "version": "47"
    }
  }
}



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Taxonomy of the tags.





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

Author Source Type Date Other

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.



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.