Bug 1549777 (CVE-2018-7536) - CVE-2018-7536 django: Catastrophic backtracking in regular expressions via 'urlize' and 'urlizetrunc'
Summary: CVE-2018-7536 django: Catastrophic backtracking in regular expressions via 'u...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2018-7536
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1549905 1549906 1551895 1551896 1551897 1551898 1551899 1551900 1551901 1552177 1552178 1552179 1552307 1554694 1557374 1557395 1557396
Blocks: 1549781
TreeView+ depends on / blocked
 
Reported: 2018-02-27 19:59 UTC by Pedro Sampaio
Modified: 2021-02-17 00:44 UTC (History)
38 users (show)

Fixed In Version: Django 2.0.3, Django 1.11.11, Django 1.8.19
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Clone Of:
Environment:
Last Closed: 2019-06-08 03:41:44 UTC
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:2927 0 None None None 2018-10-16 15:21:32 UTC
Red Hat Product Errata RHSA-2019:0051 0 None None None 2019-01-16 17:11:51 UTC
Red Hat Product Errata RHSA-2019:0082 0 None None None 2019-01-16 17:52:55 UTC
Red Hat Product Errata RHSA-2019:0265 0 None None None 2019-02-04 07:43:42 UTC

Description Pedro Sampaio 2018-02-27 19:59:49 UTC 
CVE-2018-7536: Denial-of-service possibility in ``urlize`` and
``urlizetrunc`` template filters
===========================================================================

The ``django.utils.html.urlize()`` function was extremely slow to evaluate
certain inputs due to catastrophic backtracking vulnerabilities in two
regular expressions (one regular expression for Django 1.8). The
``urlize()``
function is used to implement the ``urlize`` and ``urlizetrunc`` template
filters, which were thus vulnerable.

The problematic regular expressions are replaced with parsing logic that
behaves similarly.
Comment 5 Adam Mariš 2018-03-06 16:13:39 UTC 
Acknowledgments:

Name: the Django project
Comment 6 Adam Mariš 2018-03-06 16:13:57 UTC 
External References:

https://www.djangoproject.com/weblog/2018/mar/06/security-releases/
Comment 7 Adam Mariš 2018-03-06 16:17:00 UTC 
Created python-django tracking bugs for this issue:

Affects: fedora-all [bug 1552178]
Affects: epel-7 [bug 1552179]


Created python-django16 tracking bugs for this issue:

Affects: epel-7 [bug 1552177]
Comment 13 Andrej Nemec 2018-05-14 15:19:51 UTC 
Statement:

This issue affects the versions of django as shipped with Red Hat Subscription Asset Manager. Red Hat Product Security has rated this issue as having security impact of Moderate. A future update may address this issue. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
Comment 14 errata-xmlrpc 2018-10-16 15:20:55 UTC 
This issue has been addressed in the following products:

  Red Hat Satellite 6.4 for RHEL 7

Via RHSA-2018:2927 https://access.redhat.com/errata/RHSA-2018:2927
Comment 18 errata-xmlrpc 2019-01-16 17:11:49 UTC 
This issue has been addressed in the following products:

  Red Hat OpenStack Platform 10.0 (Newton)

Via RHSA-2019:0051 https://access.redhat.com/errata/RHSA-2019:0051
Comment 19 errata-xmlrpc 2019-01-16 17:52:52 UTC 
This issue has been addressed in the following products:

  Red Hat OpenStack Platform 13.0 (Queens)

Via RHSA-2019:0082 https://access.redhat.com/errata/RHSA-2019:0082
Comment 20 errata-xmlrpc 2019-02-04 07:43:40 UTC 
This issue has been addressed in the following products:

  Red Hat Gluster Storage 3.4 for RHEL 7

Via RHSA-2019:0265 https://access.redhat.com/errata/RHSA-2019:0265
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