Vulnerability CVE-2018-7537

Vulnerability Name:

CVE-2018-7537 (CCN-139915)

Assigned:

2018-03-06

Published:

2018-03-06

Updated:

2019-02-28

Summary:

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 v3 Severity:

5.3 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
4.6 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Low

5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
4.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Low

CVSS v2 Severity:

5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Authentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Partial

5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Partial

Vulnerability Type:

CWE-185

Vulnerability Consequences:

Denial of Service

References:

Source: MITRE
Type: CNA
CVE-2018-7537

Source: BID
Type: Third Party Advisory, VDB Entry
103357

Source: REDHAT
Type: Third Party Advisory
RHSA-2018:2927

Source: REDHAT
Type: Third Party Advisory
RHSA-2019:0265

Source: XF
Type: UNKNOWN
django-cve20187537-dos(139915)

Source: MLIST
Type: Mailing List, Third Party Advisory
[debian-lts-announce] 20180308 [SECURITY] [DLA 1303-1] python-django security update

Source: UBUNTU
Type: Third Party Advisory
USN-3591-1

Source: DEBIAN
Type: Third Party Advisory
DSA-4161

Source: CCN
Type: Django Web site
Django security releases issued: 2.0.3, 1.11.11, and 1.8.19

Source: CONFIRM
Type: Release Notes, Vendor Advisory
https://www.djangoproject.com/weblog/2018/mar/06/security-releases/

Vulnerable Configuration:

Configuration 1:

cpe:/o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*

OR cpe:/o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*

OR cpe:/o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*

Configuration 2:

cpe:/a:djangoproject:django:*:*:*:*:*:*:*:* (Version >= 1.8 and < 1.8.19)

OR cpe:/a:djangoproject:django:*:*:*:*:*:*:*:* (Version >= 1.11 and < 1.11.11)

OR cpe:/a:djangoproject:django:*:*:*:*:*:*:*:* (Version >= 2.0 and < 2.0.3)

Configuration 3:

cpe:/o:debian:debian_linux:7.0:*:*:*:*:*:*:*

OR cpe:/o:debian:debian_linux:8.0:*:*:*:*:*:*:*

OR cpe:/o:debian:debian_linux:9.0:*:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:org.opensuse.security:def:20187537	V	CVE-2018-7537	2022-06-30
oval:org.opensuse.security:def:113248	P	python36-Django-3.2.7-2.3 on GA media (Moderate)	2022-01-17
oval:org.opensuse.security:def:58069	P	Security update for xorg-x11-server (Important)	2021-12-14
oval:org.opensuse.security:def:58045	P	Security update for the Linux Kernel (Live Patch 40 for SLE 12 SP3) (Important)	2021-11-19
oval:org.opensuse.security:def:106660	P	python36-Django-3.2.7-2.3 on GA media (Moderate)	2021-10-01
oval:org.opensuse.security:def:57095	P	Security update for the Linux Kernel (Live Patch 40 for SLE 12 SP3) (Important)	2021-09-23
oval:org.opensuse.security:def:57995	P	Security update for the Linux Kernel (Live Patch 37 for SLE 12 SP3) (Important)	2021-08-25
oval:org.opensuse.security:def:55223	P	Security update for systemd (Important)	2021-07-21
oval:org.opensuse.security:def:56046	P	Security update for the Linux Kernel (Important)	2021-07-20
oval:org.opensuse.security:def:55200	P	Security update for libX11 (Important)	2021-06-08
oval:org.opensuse.security:def:57926	P	Security update for the Linux Kernel (Live Patch 36 for SLE 12 SP3) (Important)	2021-06-04
oval:org.opensuse.security:def:55880	P	Security update for the Linux Kernel (Live Patch 38 for SLE 12 SP2) (Important)	2021-04-12
oval:org.opensuse.security:def:57964	P	Security update for MozillaFirefox (Important)	2021-01-29
oval:org.opensuse.security:def:55201	P	Security update for java-1_7_1-ibm (Moderate)	2021-01-04
oval:org.opensuse.security:def:56922	P	Security update for clamav (Important)	2020-12-22
oval:org.opensuse.security:def:55774	P	Security update for the Linux Kernel (Live Patch 34 for SLE 12 SP2) (Important)	2020-12-07
oval:org.opensuse.security:def:55363	P	python-libxml2 on GA media (Moderate)	2020-12-01
oval:org.opensuse.security:def:56521	P	Security update for gpg2 (Important)	2020-12-01
oval:org.opensuse.security:def:25698	P	Security update for dpdk (Moderate)	2020-12-01
oval:org.opensuse.security:def:56439	P	Security update for samba and resource-agents (Important)	2020-12-01
oval:org.opensuse.security:def:25393	P	Security update for libqt5-qtbase (Important)	2020-12-01
oval:org.opensuse.security:def:56724	P	Security update for clamav (Important)	2020-12-01
oval:org.opensuse.security:def:25684	P	Security update for postgresql10 (Important)	2020-12-01
oval:org.opensuse.security:def:56331	P	Security update for the Linux Kernel (Important)	2020-12-01
oval:org.opensuse.security:def:25309	P	Security update for MozillaFirefox (Moderate)	2020-12-01
oval:org.opensuse.security:def:56684	P	Security update for libqt5-qtbase (Moderate)	2020-12-01
oval:org.opensuse.security:def:26415	P	Security update for python-Django (Moderate)	2020-12-01
oval:org.opensuse.security:def:56643	P	Security update for ImageMagick (Moderate)	2020-12-01
oval:org.opensuse.security:def:57760	P	libMagickCore-6_Q16-1 on GA media (Moderate)	2020-12-01
oval:org.opensuse.security:def:25252	P	Security update for ipmitool (Important)	2020-12-01
oval:org.opensuse.security:def:56544	P	Security update for rsyslog (Moderate)	2020-12-01
oval:org.opensuse.security:def:24969	P	Security update for kernel-firmware (Moderate)	2020-12-01
oval:org.opensuse.security:def:56605	P	Security update for ghostscript (Important)	2020-12-01
oval:org.opensuse.security:def:57652	P	Security update for xen (Important)	2020-12-01
oval:org.opensuse.security:def:25171	P	Security update for mailman (Important)	2020-12-01
oval:org.opensuse.security:def:56522	P	Security update for rsync (Moderate)	2020-12-01
oval:org.opensuse.security:def:56531	P	Security update for unixODBC (Moderate)	2020-12-01
oval:org.opensuse.security:def:57367	P	Security update for gpgme	2020-12-01
oval:org.opensuse.security:def:25044	P	Security update for dhcp (Moderate)	2020-12-01
oval:org.opensuse.security:def:26380	P	Security update for irssi (Moderate)	2020-12-01
oval:org.opensuse.security:def:25596	P	Security update for xorg-x11-server (Important)	2020-12-01
oval:org.opensuse.security:def:57201	P	Security update for coreutils	2020-12-01
oval:org.opensuse.security:def:55601	P	Security update for spice (Moderate)	2020-12-01
oval:org.opensuse.security:def:24980	P	Security update for ucode-intel (Important)	2020-12-01
oval:org.opensuse.security:def:25742	P	Security update for ceph (Important)	2020-12-01
oval:org.opensuse.security:def:57852	P	libspice-client-glib-2_0-8 on GA media (Moderate)	2020-12-01
oval:org.opensuse.security:def:25543	P	Security update for libgxps (Moderate)	2020-12-01
oval:org.opensuse.security:def:80704	P	Security update for python-Django (Moderate)	2018-04-18
oval:com.ubuntu.artful:def:20187537000	V	CVE-2018-7537 on Ubuntu 17.10 (artful) - medium.	2018-03-09
oval:com.ubuntu.xenial:def:201875370000000	V	CVE-2018-7537 on Ubuntu 16.04 LTS (xenial) - medium.	2018-03-09
oval:com.ubuntu.trusty:def:20187537000	V	CVE-2018-7537 on Ubuntu 14.04 LTS (trusty) - medium.	2018-03-09
oval:com.ubuntu.xenial:def:20187537000	V	CVE-2018-7537 on Ubuntu 16.04 LTS (xenial) - medium.	2018-03-09

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