Bug 2037024 (CVE-2021-45115)

Summary:	CVE-2021-45115 django: Denial-of-service possibility in UserAttributeSimilarityValidator
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	amctagga, anharris, apevec, bbuckingham, bcoca, bcourt, bkearney, bniver, btotty, caswilli, cmeyers, davidn, dbecker, ehelms, flucifre, gblomqui, gmeno, hvyas, jal233, jcammara, jhardy, jjoyce, jobarker, jschluet, jsherril, jwong, kaycoth, lhh, lpeer, lzap, mabashia, mbenjamin, mburns, mhackett, mhroncok, mhulan, michel, mmccune, mrunge, myarboro, nmoumoul, notting, orabin, osapryki, pcreech, rchan, rdopiera, relrod, rhos-maint, rpetrell, sclewis, sdoran, sgallagh, slavek.kabrda, slinaber, smcdonal, sostapov, tkuratom, vereddy
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	Django 4.0.1, Django 3.2.11, Django 2.2.26	Doc Type:	If docs needed, set a value
Doc Text:	A resource-consumption flaw was found in django's UserAttributeSimilarityValidator, where it incurred significant overhead evaluating any submitted password that was artificially large relative to comparison values. A network attacker could exploit this flaw to cause a denial of service.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-07-05 20:10:52 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2040367, 2040368, 2040369, 2037170, 2037171, 2037172, 2037173, 2037174, 2037175, 2037753, 2037754, 2050718, 2050745
Bug Blocks:	2037030

Description Pedro Sampaio 2022-01-04 16:46:18 UTC

:class:`.UserAttributeSimilarityValidator` incurred significant overhead
evaluating submitted password that were artificially large in relative to the
comparison values. On the assumption that access to user registration was
unrestricted this provided a potential vector for a denial-of-service attack.

References:

https://www.djangoproject.com/weblog/2022/jan/04/security-releases/

Comment 1 Summer Long 2022-01-05 06:57:26 UTC

Created django:1.6/python-django tracking bugs for this issue:

Affects: fedora-all [bug 2037170]


Created python-django tracking bugs for this issue:

Affects: epel-all [bug 2037171]
Affects: fedora-all [bug 2037174]
Affects: openstack-rdo [bug 2037172]

Comment 3 Summer Long 2022-01-06 00:06:03 UTC

Upstream commit: https://github.com/django/django/commit/df79ef03ac867c93caaa6be56bc69e66abfeef8f

Comment 9 errata-xmlrpc 2022-07-05 14:27:29 UTC

This issue has been addressed in the following products:

  Red Hat Satellite 6.11 for RHEL 7
  Red Hat Satellite 6.11 for RHEL 8

Via RHSA-2022:5498 https://access.redhat.com/errata/RHSA-2022:5498

Comment 10 Product Security DevOps Team 2022-07-05 20:10:47 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-45115