Debian DLA-1303-1 : python-django security update

Medium Nessus Plugin ID 107242

Synopsis

The remote Debian host is missing a security update.

Description

Several functions were extremely slow to evaluate certain inputs due to catastrophic backtracking vulnerabilities in several regular expressions.

CVE-2018-7536

The django.utils.html.urlize() function was extremely slow to evaluate certain inputs due to catastrophic backtracking vulnerabilities in two regular expressions. The urlize() function is used to implement the urlize and urlizetrunc template filters, which were thus vulnerable.

The problematic regular expressions are replaced with parsing logic that behaves similarly.

CVE-2018-7537

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.

The backtracking problem in the regular expression is fixed.

For Debian 7 'Wheezy', these problems have been fixed in version 1.4.22-1+deb7u4.

We recommend that you upgrade your python-django packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Upgrade the affected python-django, and python-django-doc packages.

See Also

https://lists.debian.org/debian-lts-announce/2018/03/msg00006.html

https://packages.debian.org/source/wheezy/python-django

Plugin Details

Severity: Medium

ID: 107242

File Name: debian_DLA-1303.nasl

Version: 1.4

Type: local

Agent: unix

Published: 2018/03/09

Updated: 2020/03/12

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS v3.0

Base Score: 5.3

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:python-django, p-cpe:/a:debian:debian_linux:python-django-doc, cpe:/o:debian:debian_linux:7.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Patch Publication Date: 2018/03/08

Reference Information

CVE: CVE-2018-7536, CVE-2018-7537