CVE-2018-7537
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. If django.utils.text.Truncator's chars() and words() methods were passed the html=True argument, they were extremely slow to evaluate certain inputs due to a catastrophic backtracking vulnerability in a regular expression. The chars() and words() methods are used to implement the truncatechars_html and truncatewords_html template filters, which were thus vulnerable.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| pip/django | >=1.8<1.8.19 | 1.8.19 |
| pip/django | >=1.11<1.11.11 | 1.11.11 |
| pip/django | >=2.0<2.0.3 | 2.0.3 |
| 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/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 |
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Reference Links
- https://nvd.nist.gov/vuln/detail/CVE-2018-7537
- https://access.redhat.com/errata/RHSA-2018:2927
- https://access.redhat.com/errata/RHSA-2019:0265
- https://github.com/advisories/GHSA-2f9x-5v75-3qv4 (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/103357
- https://launchpad.net/bugs/cve/CVE-2018-7537
- 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=1549779
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-7537
- https://security-tracker.debian.org/tracker/CVE-2018-7537
- https://ubuntu.com/security/CVE-2018-7537
- https://github.com/django/django/commit/a91436360b79a6ff995c3e5018bcc666dfaf1539
- https://github.com/django/django/commit/94c5da1d17a6b0d378866c66b605102c19f7988c
- https://github.com/django/django/commit/d17974a287a6ea2e361daff88fcc004cbd6835fa
- https://usn.ubuntu.com/3591-1
- https://www.djangoproject.com/weblog/2018/mar/06/security-releases
- https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2018-6.yaml
Frequently Asked Questions
What is CVE-2018-7537?
CVE-2018-7537 is a vulnerability in Django versions 2.0 before 2.0.3, 1.11 before 1.11.11, and 1.8 before 1.8.19.
How severe is CVE-2018-7537?
CVE-2018-7537 has a severity rating of 5.3 (Medium).
How do I fix the CVE-2018-7537 vulnerability?
To fix the CVE-2018-7537 vulnerability, upgrade your Django installation to version 2.0.3, 1.11.11, or 1.8.19.
Where can I find more information about CVE-2018-7537?
More information about CVE-2018-7537 can be found on the MITRE website (https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-7537) and the Django website (https://www.djangoproject.com/weblog/2018/mar/06/security-releases/).
Is there a fix available for CVE-2018-7537?
Yes, there is a fix available for CVE-2018-7537. Upgrade your Django installation to version 2.0.3, 1.11.11, or 1.8.19.
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