Incorrect Regular Expression Affecting python-django package, versions <1.8.7-1ubuntu5.6
Threat Intelligence
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Start learning- Snyk IDSNYK-UBUNTU1604-PYTHONDJANGO-360987
- published9 Mar 2018
- disclosed9 Mar 2018
Introduced: 9 Mar 2018
CVE-2018-7536 (opens in a new tab)How to fix?
Upgrade Ubuntu:16.04 python-django to version 1.8.7-1ubuntu5.6 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream python-django package and not the python-django package as distributed by Ubuntu.
See How to fix? for Ubuntu:16.04 relevant fixed versions and status.
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.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2018-7536
- https://www.djangoproject.com/weblog/2018/mar/06/security-releases/
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-7536
- https://www.debian.org/security/2018/dsa-4161
- https://lists.debian.org/debian-lts-announce/2018/03/msg00006.html
- https://security-tracker.debian.org/tracker/CVE-2018-7536
- https://access.redhat.com/errata/RHSA-2018:2927
- https://access.redhat.com/errata/RHSA-2019:0051
- https://access.redhat.com/errata/RHSA-2019:0082
- https://access.redhat.com/errata/RHSA-2019:0265
- http://www.securityfocus.com/bid/103361
- https://usn.ubuntu.com/3591-1/
- https://github.com/django/django/commit/1ca63a66ef3163149ad822701273e8a1844192c2
- https://github.com/django/django/commit/abf89d729f210c692a50e0ad3f75fb6bec6fae16
- https://github.com/django/django/commit/e157315da3ae7005fa0683ffc9751dbeca7306c8