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CVE-2018-7537 (GCVE-0-2018-7537)

Vulnerability from cvelistv5 – Published: 2018-03-09 20:00 – Updated: 2024-08-05 06:31
VLAI
Summary
An issue was discovered in Django 2.0 before 2.0.3, 1.11 before 1.11.11, and 1.8 before 1.8.19. If django.utils.text.Truncator's chars() and words() methods were passed the html=True argument, they were extremely slow to evaluate certain inputs due to a catastrophic backtracking vulnerability in a regular expression. The chars() and words() methods are used to implement the truncatechars_html and truncatewords_html template filters, which were thus vulnerable.
Severity
5.3 (Medium)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE
  • n/a
Assigner
References
URL Tags
https://usn.ubuntu.com/3591-1/ vendor-advisoryx_refsource_UBUNTU
https://lists.debian.org/debian-lts-announce/2018… mailing-listx_refsource_MLIST
https://www.djangoproject.com/weblog/2018/mar/06/… x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2018:2927 vendor-advisoryx_refsource_REDHAT
http://www.securityfocus.com/bid/103357 vdb-entryx_refsource_BID
https://access.redhat.com/errata/RHSA-2019:0265 vendor-advisoryx_refsource_REDHAT
https://www.debian.org/security/2018/dsa-4161 vendor-advisoryx_refsource_DEBIAN
Date Public
2018-03-06 00:00
Show details on NVD website
To clipboard 

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Party Advisory\",\"VDB Entry\"]},{\"url\":\"https://access.redhat.com/errata/RHSA-2018:2927\",\"source\":\"cve@mitre.org\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://access.redhat.com/errata/RHSA-2019:0265\",\"source\":\"cve@mitre.org\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2018/03/msg00006.html\",\"source\":\"cve@mitre.org\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://usn.ubuntu.com/3591-1/\",\"source\":\"cve@mitre.org\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.debian.org/security/2018/dsa-4161\",\"source\":\"cve@mitre.org\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.djangoproject.com/weblog/2018/mar/06/security-releases/\",\"source\":\"cve@mitre.org\",\"tags\":[\"Release Notes\",\"Vendor Advisory\"]},{\"url\":\"http://www.securityfocus.com/bid/103357\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"https://access.redhat.com/errata/RHSA-2018:2927\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://access.redhat.com/errata/RHSA-2019:0265\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2018/03/msg00006.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://usn.ubuntu.com/3591-1/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.debian.org/security/2018/dsa-4161\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.djangoproject.com/weblog/2018/mar/06/security-releases/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Release Notes\",\"Vendor Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T05:52:51+00:00",
      "cve": "CVE-2018-7537",
      "id": "CVE-2018-7537",
      "initial_release_date": "2018-03-06T00:00:00+00:00",
      "product_status:fixed": "1150",
      "product_status:known_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "django: Catastrophic backtracking in regular expressions via \u0027truncatechars_html\u0027 and \u0027truncatewords_html\u0027",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2018/cve-2018-7537.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-19T18:29:03Z",
      "cve": "CVE-2018-7537",
      "id": "CVE-2018-7537",
      "initial_release_date": "2023-02-15T04:29:38Z",
      "product_status:recommended": "23",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2018-7537",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2018-7537.json",
      "version": "12"
    }
  }
}



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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

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.