CVE-2018-7536
First published: Tue Feb 27 2018(Updated: )
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.
Credit: cve@mitre.org cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Canonical Ubuntu Linux | =14.04 | |
| Canonical Ubuntu Linux | =16.04 | |
| Canonical Ubuntu Linux | =17.10 | |
| Djangoproject Django | >=1.8<1.8.19 | |
| Djangoproject Django | >=1.11<1.11.11 | |
| Djangoproject Django | >=2.0<2.0.3 | |
| Debian Debian Linux | =7.0 | |
| Debian Debian Linux | =8.0 | |
| Debian Debian Linux | =9.0 | |
| Redhat Openstack | =10 | |
| Redhat Openstack | =13 | |
| redhat/Django | <2.0.3 | 2.0.3 |
| redhat/Django | <1.11.11 | 1.11.11 |
| redhat/Django | <1.8.19 | 1.8.19 |
| debian/python-django | 2:2.2.28-1~deb11u2 3:3.2.19-1+deb12u1 3:4.2.16-1 | |
| pip/Django | >=1.8a1<1.8.19 | 1.8.19 |
| pip/Django | >=1.11a1<1.11.11 | 1.11.11 |
| pip/Django | >=2.0a1<2.0.3 | 2.0.3 |
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Reference Links
- https://nvd.nist.gov/vuln/detail/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
- https://github.com/advisories/GHSA-r28v-mw67-m5p9 (Advisory)
- https://lists.debian.org/debian-lts-announce/2018/03/msg00006.html
- https://usn.ubuntu.com/3591-1/
- https://www.debian.org/security/2018/dsa-4161
- https://www.djangoproject.com/weblog/2018/mar/06/security-releases/
- http://www.securityfocus.com/bid/103361
- https://github.com/django/django/commit/1ca63a66ef3163149ad822701273e8a1844192c2
- https://github.com/django/django/commit/abf89d729f210c692a50e0ad3f75fb6bec6fae16
- https://github.com/django/django/commit/e157315da3ae7005fa0683ffc9751dbeca7306c8
- https://launchpad.net/bugs/cve/CVE-2018-7536
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1552178
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1552179
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1552177
- https://access.redhat.com/security/updates/classification/
- https://bugzilla.redhat.com/show_bug.cgi?id=1549777
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-7536
- https://security-tracker.debian.org/tracker/CVE-2018-7536
- https://ubuntu.com/security/CVE-2018-7536
- https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2018-5.yaml
- https://usn.ubuntu.com/3591-1
- https://web.archive.org/web/20200227131019/http://www.securityfocus.com/bid/103361
- https://www.djangoproject.com/weblog/2018/mar/06/security-releases
Frequently Asked Questions
What is CVE-2018-7536?
CVE-2018-7536 is a vulnerability in Django 2.0 before 2.0.3, 1.11 before 1.11.11, and 1.8 before 1.8.19 that allows for catastrophic backtracking and can result in a denial of service attack.
How severe is CVE-2018-7536?
CVE-2018-7536 has a severity rating of 5.3, which is considered medium.
How can I fix CVE-2018-7536?
To fix CVE-2018-7536, upgrade to Django 1.8.19, 1.11.11, or 2.0.3 depending on the version you are using.
Where can I find more information about CVE-2018-7536?
You can find more information about CVE-2018-7536 on the CVE Mitre website and the Django security releases page.
What is the common weakness enumeration (CWE) for CVE-2018-7536?
The CWE for CVE-2018-7536 is CWE-185, which refers to a behavior that can expose sensitive information.
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