Vulnerability Monitor

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CVE-2018-7536

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.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.3, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and limited availability for affected systems. Impacting 4 products from canonical, from djangoproject, from debian and 1 other, organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2018, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2018-03-09T20:29:00.613

Last Modified

2024-11-21T04:12:19.070

Status

Modified

Source

[email protected]

Severity

CVSSv3.0: 5.3 (MEDIUM)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-185

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	canonical	ubuntu_linux	14.04	Yes
Operating System	canonical	ubuntu_linux	16.04	Yes
Operating System	canonical	ubuntu_linux	17.10	Yes
Application	djangoproject	django	< 1.8.19	Yes
Application	djangoproject	django	< 1.11.11	Yes
Application	djangoproject	django	< 2.0.3	Yes
Operating System	debian	debian_linux	7.0	Yes
Operating System	debian	debian_linux	8.0	Yes
Operating System	debian	debian_linux	9.0	Yes
Application	redhat	openstack	10	Yes
Application	redhat	openstack	13	Yes

References

http://www.securityfocus.com/bid/103361 Third Party Advisory, VDB Entry ([email protected])
https://access.redhat.com/errata/RHSA-2018:2927 Third Party Advisory ([email protected])
https://access.redhat.com/errata/RHSA-2019:0051 Third Party Advisory ([email protected])
https://access.redhat.com/errata/RHSA-2019:0082 Third Party Advisory ([email protected])
https://access.redhat.com/errata/RHSA-2019:0265 Third Party Advisory ([email protected])
https://github.com/django/django/commit/1ca63a66ef3163149ad822701273e8a1844192c2 ([email protected])
https://github.com/django/django/commit/abf89d729f210c692a50e0ad3f75fb6bec6fae16 ([email protected])
https://github.com/django/django/commit/e157315da3ae7005fa0683ffc9751dbeca7306c8 ([email protected])
https://lists.debian.org/debian-lts-announce/2018/03/msg00006.html Mailing List, Third Party Advisory ([email protected])
https://usn.ubuntu.com/3591-1/ Third Party Advisory ([email protected])
https://www.debian.org/security/2018/dsa-4161 Third Party Advisory ([email protected])
https://www.djangoproject.com/weblog/2018/mar/06/security-releases/ Release Notes, Vendor Advisory ([email protected])
http://www.securityfocus.com/bid/103361 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://access.redhat.com/errata/RHSA-2018:2927 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://access.redhat.com/errata/RHSA-2019:0051 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://access.redhat.com/errata/RHSA-2019:0082 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://access.redhat.com/errata/RHSA-2019:0265 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/django/django/commit/1ca63a66ef3163149ad822701273e8a1844192c2 (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/django/django/commit/abf89d729f210c692a50e0ad3f75fb6bec6fae16 (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/django/django/commit/e157315da3ae7005fa0683ffc9751dbeca7306c8 (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2018/03/msg00006.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://usn.ubuntu.com/3591-1/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.debian.org/security/2018/dsa-4161 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.djangoproject.com/weblog/2018/mar/06/security-releases/ Release Notes, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For canonical's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.