Vulnerability advisory

GHSA-2f9x-5v75-3qv4

Django Denial-of-service possibility in truncatechars_html and truncatewords_html template filters

Published Jan 4, 2019Updated Nov 27, 2024OSV record ↗

Also known as CVE-2018-7537PYSEC-2018-6

Severity

CVSS 3.xCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS 4.0CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U

Affected versions

django PyPI

All django advisories →

Affected	Fixed in
`2.0` to before 2.0.3	`2.0.3`Advisories →
Also listed as affected (3) `2.0` `2.0.1` `2.0.2`
`1.11` to before 1.11.11	`1.11.11`Advisories →
Also listed as affected (11) `1.11` `1.11.1` `1.11.10` `1.11.2` `1.11.3` `1.11.4` `1.11.5` `1.11.6` `1.11.7` `1.11.8` `1.11.9`
`1.8` to before 1.8.19	`1.8.19`Advisories →
Also listed as affected (19) `1.8` `1.8.1` `1.8.10` `1.8.11` `1.8.12` `1.8.13` `1.8.14` `1.8.15` `1.8.16` `1.8.17` `1.8.18` `1.8.2` `1.8.3` `1.8.4` `1.8.5` `1.8.6` `1.8.7` `1.8.8` `1.8.9`

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.

GHSA-2f9x-5v75-3qv4

Affected versions

django PyPI

Description

References