CVE-2018-7537

medium

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.

References

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/

Details

Source: MITRE

Published: 2018-03-09

Updated: 2019-02-28

Type: CWE-185

Risk Information

CVSS v2

Base Score: 5

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Impact Score: 2.9

Exploitability Score: 10

Severity: MEDIUM

CVSS v3

Base Score: 5.3

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

Impact Score: 1.4

Exploitability Score: 3.9

Severity: MEDIUM