CVE-2018-7537

Description

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.

Predictions

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

References

• https://nvd.nist.gov/vuln/detail/CVE-2018-7537
• https://github.com/django/django/commit/94c5da1d17a6b0d378866c66b605102c19f7988c
• https://github.com/django/django/commit/a91436360b79a6ff995c3e5018bcc666dfaf1539
• https://github.com/django/django/commit/d17974a287a6ea2e361daff88fcc004cbd6835fa
• https://access.redhat.com/errata/RHSA-2018:2927
• https://access.redhat.com/errata/RHSA-2019:0265
• https://github.com/advisories/GHSA-2f9x-5v75-3qv4
• https://github.com/django/django
• https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2018-6.yaml
• 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
• https://security.archlinux.org/ASA-201803-5
• https://www.suse.com/security/cve/CVE-2018-7537.html
• https://www.djangoproject.com/weblog/2018/mar/06/security-releases/
• http://www.securityfocus.com/bid/103357
• https://usn.ubuntu.com/3591-1/
• https://security-tracker.debian.org/tracker/CVE-2018-7537