CVE-2018-7536 (GCVE-0-2018-7536)
Vulnerability from cvelistv5 – Published: 2018-03-09 00:00 – Updated: 2024-08-05 06:31
VLAI
EPSS
VEX
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. The django.utils.html.urlize() function was extremely slow to evaluate certain inputs due to catastrophic backtracking vulnerabilities in two regular expressions (only one regular expression for Django 1.8.x). The urlize() function is used to implement the urlize and urlizetrunc template filters, which were thus vulnerable.
Severity
5.3 (Medium)
CWE
- n/a
Assigner
References
12 references
| URL | Tags |
|---|---|
| https://usn.ubuntu.com/3591-1/ | vendor-advisory |
| https://access.redhat.com/errata/RHSA-2019:0051 | vendor-advisory |
| https://lists.debian.org/debian-lts-announce/2018… | mailing-list |
| http://www.securityfocus.com/bid/103361 | vdb-entry |
| https://www.djangoproject.com/weblog/2018/mar/06/… | |
| https://access.redhat.com/errata/RHSA-2019:0082 | vendor-advisory |
| https://access.redhat.com/errata/RHSA-2018:2927 | vendor-advisory |
| https://access.redhat.com/errata/RHSA-2019:0265 | vendor-advisory |
| https://www.debian.org/security/2018/dsa-4161 | vendor-advisory |
| https://github.com/django/django/commit/1ca63a66e… | |
| https://github.com/django/django/commit/abf89d729… | |
| https://github.com/django/django/commit/e157315da… |
Date Public
2018-03-06 00:00
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"value": "Se ha descubierto un problema en Django, en versiones 2.0 anteriores a la 2.0.3; versiones 1.11 anteriores a la 1.11.11 y versiones 1.8 anteriores a la 1.8.19. La funci\u00f3n django.utils.html.urlize() fue extremadamente lenta a la hora de evaluar ciertas entradas debido a vulnerabilidades catastr\u00f3ficas de b\u00fasqueda hacia atr\u00e1s en dos expresiones regulares (solo una en el caso de las versiones 1.8.x de Django). La funci\u00f3n urlize() se emplea para implementar las plantillas de filtro urlize y urlizetrunc que, por lo tanto, eran vulnerables."
}
],
"id": "CVE-2018-7536",
"lastModified": "2024-11-21T04:12:19.070",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": true,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 5.0,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV30": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.0"
},
"exploitabilityScore": 3.9,
"impactScore": 1.4,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2018-03-09T20:29:00.613",
"references": [
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securityfocus.com/bid/103361"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory"
],
"url": "https://access.redhat.com/errata/RHSA-2018:2927"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory"
],
"url": "https://access.redhat.com/errata/RHSA-2019:0051"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory"
],
"url": "https://access.redhat.com/errata/RHSA-2019:0082"
},
{
"source": "cve@mitre.org",
"tags": [
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],
"url": "https://access.redhat.com/errata/RHSA-2019:0265"
},
{
"source": "cve@mitre.org",
"url": "https://github.com/django/django/commit/1ca63a66ef3163149ad822701273e8a1844192c2"
},
{
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"url": "https://github.com/django/django/commit/abf89d729f210c692a50e0ad3f75fb6bec6fae16"
},
{
"source": "cve@mitre.org",
"url": "https://github.com/django/django/commit/e157315da3ae7005fa0683ffc9751dbeca7306c8"
},
{
"source": "cve@mitre.org",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "https://lists.debian.org/debian-lts-announce/2018/03/msg00006.html"
},
{
"source": "cve@mitre.org",
"tags": [
"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": [
"Release Notes",
"Vendor Advisory"
],
"url": "https://www.djangoproject.com/weblog/2018/mar/06/security-releases/"
},
{
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"tags": [
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"VDB Entry"
],
"url": "http://www.securityfocus.com/bid/103361"
},
{
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"tags": [
"Third Party Advisory"
],
"url": "https://access.redhat.com/errata/RHSA-2018:2927"
},
{
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"tags": [
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],
"url": "https://access.redhat.com/errata/RHSA-2019:0051"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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],
"url": "https://access.redhat.com/errata/RHSA-2019:0082"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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],
"url": "https://access.redhat.com/errata/RHSA-2019:0265"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://github.com/django/django/commit/1ca63a66ef3163149ad822701273e8a1844192c2"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://github.com/django/django/commit/abf89d729f210c692a50e0ad3f75fb6bec6fae16"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://github.com/django/django/commit/e157315da3ae7005fa0683ffc9751dbeca7306c8"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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"Third Party Advisory"
],
"url": "https://lists.debian.org/debian-lts-announce/2018/03/msg00006.html"
},
{
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"tags": [
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],
"url": "https://usn.ubuntu.com/3591-1/"
},
{
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"tags": [
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],
"url": "https://www.debian.org/security/2018/dsa-4161"
},
{
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"tags": [
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"Vendor Advisory"
],
"url": "https://www.djangoproject.com/weblog/2018/mar/06/security-releases/"
}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-185"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-06-28T06:18:01+00:00",
"cve": "CVE-2018-7536",
"id": "CVE-2018-7536",
"initial_release_date": "2018-03-06T00:00:00+00:00",
"product_status:fixed": "1156",
"product_status:known_affected": "35",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "django: Catastrophic backtracking in regular expressions via \u0027urlize\u0027 and \u0027urlizetrunc\u0027",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2018/cve-2018-7536.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-07-19T18:29:04Z",
"cve": "CVE-2018-7536",
"id": "CVE-2018-7536",
"initial_release_date": "2023-02-15T04:29:38Z",
"product_status:recommended": "23",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2018-7536",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2018-7536.json",
"version": "13"
}
}
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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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.