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CVE-2019-9947 (GCVE-0-2019-9947)

Vulnerability from cvelistv5 – Published: 2019-03-23 17:06 – Updated: 2024-08-04 22:10
VLAI
Summary
An issue was discovered in urllib2 in Python 2.x through 2.7.16 and urllib in Python 3.x through 3.7.3. CRLF injection is possible if the attacker controls a url parameter, as demonstrated by the first argument to urllib.request.urlopen with \r\n (specifically in the path component of a URL that lacks a ? character) followed by an HTTP header or a Redis command. This is similar to the CVE-2019-9740 query string issue. This is fixed in: v2.7.17, v2.7.17rc1, v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1, 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; v3.7.4, 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
6.1 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CWE
  • n/a
Assigner
References
URL Tags
https://bugs.python.org/issue35906 x_refsource_MISC
https://security.netapp.com/advisory/ntap-2019040… x_refsource_CONFIRM
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://access.redhat.com/errata/RHSA-2019:1260 vendor-advisoryx_refsource_REDHAT
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
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://lists.debian.org/debian-lts-announce/2019… mailing-listx_refsource_MLIST
https://access.redhat.com/errata/RHSA-2019:2030 vendor-advisoryx_refsource_REDHAT
https://usn.ubuntu.com/4127-2/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4127-1/ vendor-advisoryx_refsource_UBUNTU
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-2019:3335 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:3520 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:3725 vendor-advisoryx_refsource_REDHAT
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
https://security.gentoo.org/glsa/202003-26 vendor-advisoryx_refsource_GENTOO
https://lists.debian.org/debian-lts-announce/2020… mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2020… mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/02/04/2 mailing-listx_refsource_MLIST
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              "url": "https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html"
            },
            {
              "name": "[debian-lts-announce] 20200822 [SECURITY] [DLA 2337-1] python2.7 security update",
              "refsource": "MLIST",
              "url": "https://lists.debian.org/debian-lts-announce/2020/08/msg00034.html"
            },
            {
              "name": "[oss-security] 20210204 [CVE-2020-15693, CVE-2020-15694] Nim - stdlib Httpclient - Header Crlf Injection \u0026 Server Response Validation",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2021/02/04/2"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2019-9947",
    "datePublished": "2019-03-23T17:06:47.000Z",
    "dateReserved": "2019-03-23T00:00:00.000Z",
    "dateUpdated": "2024-08-04T22:10:08.547Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2019-9947",
      "date": "2026-09-18",
      "epss": "0.05253",
      "percentile": "0.92158"
    },
    "nvd": {
      "cve": {
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "B09B31A2-30BF-4E95-81A3-F77FD97DF5B6",
                    "versionEndExcluding": "2.7.17",
                    "versionStartIncluding": "2.7.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "9A384586-B574-4240-8BCF-CCE69498F336",
                    "versionEndExcluding": "3.5.8",
                    "versionStartIncluding": "3.5.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "2C052B2D-757B-4342-8BE9-510A08599779",
                    "versionEndExcluding": "3.6.9",
                    "versionStartIncluding": "3.6.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "A8E7B12E-74D0-4E51-A0A6-6C1A8B277055",
                    "versionEndExcluding": "3.7.4",
                    "versionStartIncluding": "3.7.0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "An issue was discovered in urllib2 in Python 2.x through 2.7.16 and urllib in Python 3.x through 3.7.3. CRLF injection is possible if the attacker controls a url parameter, as demonstrated by the first argument to urllib.request.urlopen with \\r\\n (specifically in the path component of a URL that lacks a ? character) followed by an HTTP header or a Redis command. This is similar to the CVE-2019-9740 query string issue. This is fixed in: v2.7.17, v2.7.17rc1, v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1, 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; v3.7.4, 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": "Se detect\u00f3 un problema en urllib2 en Python versi\u00f3n 2.x hasta la versi\u00f3n 2.7.16 y urllib en Python versi\u00f3n 3.x hasta la versi\u00f3n 3.7.3. La inyecci\u00f3n de CRLF es posible si el atacante controla un par\u00e1metro url, como lo demuestra el primer argumento de urllib.request.urlopen con \\r\\n (espec\u00edficamente en el componente path de una URL que carece de un car\u00e1cter ?) Seguido por un encabezado HTTP o Un comando Redis. Esto se igual al CVE-2019-9740 problema con la cadena de consulta. Esto est\u00e1 corregido en las versiones: v2.7.17, v2.7.17rc1, v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1, 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; v3.7.4, 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-2019-9947",
        "lastModified": "2024-11-21T04:52:39.090",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "MEDIUM",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "NONE",
                "baseScore": 4.3,
                "confidentialityImpact": "NONE",
                "integrityImpact": "PARTIAL",
                "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
                "version": "2.0"
              },
              "exploitabilityScore": 8.6,
              "impactScore": 2.9,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": true
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 6.1,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "LOW",
                "integrityImpact": "LOW",
                "privilegesRequired": "NONE",
                "scope": "CHANGED",
                "userInteraction": "REQUIRED",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 2.8,
              "impactScore": 2.7,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2019-03-23T18:29:02.027",
        "references": [
          {
            "source": "cve@mitre.org",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00062.html"
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        "sourceIdentifier": "cve@mitre.org",
        "vulnStatus": "Modified",
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                "lang": "en",
                "value": "CWE-93"
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T06:20:29+00:00",
      "cve": "CVE-2019-9947",
      "id": "CVE-2019-9947",
      "initial_release_date": "2019-03-23T00:00:00+00:00",
      "product_status:fixed": "890",
      "product_status:known_affected": "16",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "python: CRLF injection via the path part of the url passed to urlopen()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2019/cve-2019-9947.json",
      "version": "3"
    }
  }
}



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Tags
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.


Detection rules are retrieved from Rulezet.


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.