Bug 1843614 (CVE-2020-13254) - CVE-2020-13254 django: potential data leakage via malformed memcached keys
Summary: CVE-2020-13254 django: potential data leakage via malformed memcached keys
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2020-13254
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1843618 1843620 1843616 1843617 1843619 1844992 1845340 1845341 1845342 1845442 1845455 1845729 1852453
Blocks: 1843622
TreeView+ depends on / blocked
 
Reported: 2020-06-03 16:41 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-12-14 18:47 UTC (History)
33 users (show)

Fixed In Version: Django-3.0.7, Django-2.2.13
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in Django, where the memcached backend does not perform key validation and passes malformed keys. This flaw causes a key collision and potential data leakage. The highest threat from this vulnerability is to confidentiality.
Clone Of:
Environment:
Last Closed: 2021-03-17 19:51:43 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2021:0915 0 None None None 2021-03-17 15:29:25 UTC
Red Hat Product Errata RHSA-2021:0933 0 None None None 2021-03-18 13:07:12 UTC

Description Guilherme de Almeida Suckevicz 2020-06-03 16:41:32 UTC 
In cases where a memcached backend does not perform key validation, passing malformed cache keys could result in a key collision, and potential data leakage. In order to avoid this vulnerability, key validation is added to the memcached cache backends.

Reference:
https://www.djangoproject.com/weblog/2020/jun/03/security-releases/
Comment 1 Guilherme de Almeida Suckevicz 2020-06-03 16:42:11 UTC 
Created django:1.6/python-django tracking bugs for this issue:

Affects: fedora-all [bug 1843620]


Created python-django tracking bugs for this issue:

Affects: epel-all [bug 1843616]
Affects: fedora-all [bug 1843617]
Affects: openstack-rdo [bug 1843619]


Created python-django16 tracking bugs for this issue:

Affects: epel-7 [bug 1843618]
Comment 3 Yadnyawalk Tale 2020-06-08 09:47:25 UTC 
External References:

https://www.djangoproject.com/weblog/2020/jun/03/security-releases
Comment 7 Riccardo Schirone 2020-06-09 09:01:55 UTC 
Upstream patches:
https://github.com/django/django/commit/2c82414914ae6476be5a166be9ff49c24d0d9069
https://github.com/django/django/commit/229c9c6653356a0bc23846d83b2d4b5d0438a145
Comment 8 Riccardo Schirone 2020-06-09 09:08:59 UTC 
Created python2-django1.11 tracking bugs for this issue:

Affects: fedora-all [bug 1845442]
Comment 14 Hardik Vyas 2020-06-30 13:09:20 UTC 
Statement:

Red Hat Satellite 6 ships affected python-django, however, it does not use memcached implementation in product code hence not vulnerable to this flaw.

Red Hat Update Infrastructure 3 ships an affected version of python-django, however it does not use memcached as a cache backend and it is not vulnerable to this flaw.

Red Hat Ceph Storage(RHCS) ships an affected version of python-django used with calamari and graphite which are no longer supported, hence the django package will not be fixed for RHCS.
Comment 16 errata-xmlrpc 2021-03-17 15:29:18 UTC 
This issue has been addressed in the following products:

  Red Hat OpenStack Platform 16.1

Via RHSA-2021:0915 https://access.redhat.com/errata/RHSA-2021:0915
Comment 17 Product Security DevOps Team 2021-03-17 19:51:43 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-2020-13254
Comment 18 errata-xmlrpc 2021-03-18 13:07:02 UTC 
This issue has been addressed in the following products:

  Red Hat OpenStack Platform 13.0 (Queens)
  Red Hat OpenStack Platform 13.0 (Queens) for RHEL 7.6 EUS

Via RHSA-2021:0933 https://access.redhat.com/errata/RHSA-2021:0933
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