CVE-2018-7537 Information

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.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Reference

http://www.securityfocus.com/bid/103357 https://access.redhat.com/errata/RHSA-2018:2927 https://access.redhat.com/errata/RHSA-2019:0265 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/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

LOW

Base Severity

5.3