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
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Arch Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Fixed | 1.11.11-1 |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 1:1.11.11-1 |
| sid | Fixed | 1:1.11.11-1 |
| forky | Fixed | 1:1.11.11-1 |
| bullseye | Fixed | 1:1.11.11-1 |
| bookworm | Fixed | 1:1.11.11-1 |
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
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.