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Fencer Intel
high 7.5

CVE-2015-5143 json

Django Denial-of-service by filling session store

published 11y ago modified 4mo ago also GHSA-h582-2pch-3xv3 , PYSEC-2015-20 , EUVD-2015-0009

cvss
7.5
version 3.1, GitHub
cisa kev
Not listed
not in CISA's catalog
epss
7.2%
EPSS 7.2% chance of exploitation in 30 days, percentile 94%
public exploits
0
none known

Summary

The session backends in Django before 1.4.21, 1.5.x through 1.6.x, 1.7.x before 1.7.9, and 1.8.x before 1.8.3 allows remote attackers to cause a denial of service (session store consumption) via multiple requests with unique session keys.

Patch / fix

  • pypi django 1.4.21, 1.7.9, 1.8.3
  • python-django Debian 14, Debian 13, Debian 12 1.7.9-1

debian advisories DEBIAN-CVE-2015-5143

  • python-django Ubuntu 14.04 LTS 1.6.1-2ubuntu0.9

ubuntu advisories UBUNTU-CVE-2015-5143

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • python-django openstack 5 1.6.11-1.el6ost
  • python-django openstack 6, openstack 5 1.6.11-2.el7ost
  • python-django-bash-completion openstack 5 1.6.11-1.el6ost
  • python-django-bash-completion openstack 6, openstack 5 1.6.11-2.el7ost

red hat advisories RHSA-2015:1686RHSA-2015:1678

  • python-Django Enterprise Storage 2 1.6.11-3.1
  • python-Django OpenStack Cloud 5 1.6.11-10.2
  • python-Django Enterprise Storage 1.0 1.6.11-8.1

suse advisories SUSE-SU-2016:0044-1SUSE-SU-2015:1810-1SUSE-SU-2015:1815-1

Is CVE-2015-5143 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2015-5143 updated cvss 5.0

Django: possible DoS by filling session store

  • Red Hat Subscription Asset Manager Django
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 6 python-django 1.6.11-1.el6ost, python-django-bash-completion 1.6.11-1.el6ost Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 7 python-django 1.6.11-2.el7ost, python-django-bash-completion 1.6.11-2.el7ost
    fixed: vendor fix RHSA-2015:1686
  • Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7 python-django 1.6.11-2.el7ost, python-django-bash-completion 1.6.11-2.el7ost
    fixed: vendor fix RHSA-2015:1678
  • Red Hat Enterprise Linux OpenStack Platform 7 (Kilo) python-django, python-django-bash-completion
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

7.22% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 7.8 AV:N/AC:L/Au:N/C:N/I:N/A:C
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
pypi django
<1.4.21
>=1.5, <1.7.9
>=1.8, <1.8.3
1.4.21
1.7.9
1.8.3

Classification

Weakness
  • CWE-399 Resource Management Errors
  • CWE-770 Allocation of Resources Without Limits or Throttling
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.