Vulnerability CVE-2018-7536

Vulnerability Name:

CVE-2018-7536 (CCN-139914)

Assigned:

2018-03-06

Published:

2018-03-06

Updated:

2021-08-04

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. The django.utils.html.urlize() function was extremely slow to evaluate certain inputs due to catastrophic backtracking vulnerabilities in two regular expressions (only one regular expression for Django 1.8.x). The urlize() function is used to implement the urlize and urlizetrunc 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-2018-7536

Source: BID
Type: Third Party Advisory, VDB Entry
103361

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

Source: REDHAT
Type: Third Party Advisory
RHSA-2019:0051

Source: REDHAT
Type: Third Party Advisory
RHSA-2019:0082

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

Source: XF
Type: UNKNOWN
django-cve20187536-dos(139914)

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:17.10:*:*:*:*:*:*:*

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

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:*:*:*:*:*:*:*

Configuration 4:

cpe:/a:redhat:openstack:10:*:*:*:*:*:*:*

OR cpe:/a:redhat:openstack:13:*:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:org.opensuse.security:def:20187536	V	CVE-2018-7536	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:20187536000	V	CVE-2018-7536 on Ubuntu 17.10 (artful) - medium.	2018-03-09
oval:com.ubuntu.xenial:def:201875360000000	V	CVE-2018-7536 on Ubuntu 16.04 LTS (xenial) - medium.	2018-03-09
oval:com.ubuntu.trusty:def:20187536000	V	CVE-2018-7536 on Ubuntu 14.04 LTS (trusty) - medium.	2018-03-09
oval:com.ubuntu.xenial:def:20187536000	V	CVE-2018-7536 on Ubuntu 16.04 LTS (xenial) - medium.	2018-03-09

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