CVE-2015-5143: Django Django Denial-of-service By Filling Session Vulnerability

HIGH
Advisory Identifier: GHSA-h582-2pch-3xv3
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CVSS 7.5
CWE-770
Published
Advisory Summary

CVE-2015-5143 is a HIGH (CVSS 7.5) django denial-of-service by filling session vulnerability (CWE-770: Allocation of Resources Without Limits or Throttling) affecting Django libraries in the PyPI ecosystem. The issue involves django denial-of-service by filling session store. Remediation is available by upgrading affected packages to version 1.4.21, 1.7.9, 1.8.3.

CVE-2015-5143 at a Glance

CVE Identifier CVE-2015-5143
GHSA Identifier GHSA-h582-2pch-3xv3
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-770: Allocation of Resources Without Limits or Throttling
Affected Product Django
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2015-5143

To remediate this vulnerability, upgrade all affected Django dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Django fixed: 1.4.21 
pip install Django>=1.4.21
Django fixed: 1.7.9 
pip install Django>=1.7.9
Django fixed: 1.8.3 
pip install Django>=1.8.3
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show Django

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2015-5143, inspect your installed packages using pip:

pip show Django

Analyze the terminal output to locate any version of Django in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.4.21), your application is affected.

Note: The pip show Django command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-770: Allocation of Resources Without Limits or Throttling, where the product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated. In Django, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2015-5143 Affected Django Versions

3 component(s)
Fixed Versions:
1.4.211.7.91.8.3
Product / Package Ecosystem Affected Versions Fixed Version
Django
pypi/Django
PyPI
< 1.4.21
1.4.21
Django
pypi/Django
PyPI
≥ 1.5
< 1.7.9
1.7.9
Django
pypi/Django
PyPI
≥ 1.8
< 1.8.3
1.8.3

References

Security Fix Commit FIX COMMIT
https://github.com/django/django/commit/66d12d1ababa8f062857ee5eb43276493720bf16
NVD — CVE-2015-5143 NVD
https://nvd.nist.gov/vuln/detail/CVE-2015-5143
Security Fix Commit FIX COMMIT
https://github.com/django/django/commit/1828f4341ec53a8684112d24031b767eba557663
Security Fix Commit FIX COMMIT
https://github.com/django/django/commit/2e47f3e401c29bc2ba5ab794d483cb0820855fb9
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-h582-2pch-3xv3
Django Source Repository REPOSITORY
https://github.com/django/django
Django Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2015-20.yaml
Django Security Information SECURITY
https://security.gentoo.org/glsa/201510-06
Django Release RELEASE
https://www.djangoproject.com/weblog/2015/jul/08/security-releases
lists.fedoraproject.org/pipermail/package-a... WEB
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/172084.html
lists.opensuse.org/opensuse-updates/20... WEB
http://lists.opensuse.org/opensuse-updates/2015-10/msg00043.html
lists.opensuse.org/opensuse-updates/20... WEB
http://lists.opensuse.org/opensuse-updates/2015-10/msg00046.html
rhn.redhat.com/errata/rhsa-2015-16... WEB
http://rhn.redhat.com/errata/RHSA-2015-1678.html
rhn.redhat.com/errata/rhsa-2015-16... WEB
http://rhn.redhat.com/errata/RHSA-2015-1686.html
Django Security Information SECURITY
http://www.debian.org/security/2015/dsa-3305
Django Security Information SECURITY
http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html
www.ubuntu.com/usn/usn-2671-1 WEB
http://www.ubuntu.com/usn/USN-2671-1

Frequently Asked Questions

What is CVE-2015-5143?
CVE-2015-5143 is a security vulnerability in Django involving Django Denial-of-service by filling session store under CWE-770: Allocation of Resources Without Limits or Throttling.
Which Django versions are affected?
Affected versions include releases prior to 1.4.21, 1.7.9, 1.8.3 across affected packages: Django.
What version fixes CVE-2015-5143?
Upgrading to 1.4.21, 1.7.9, 1.8.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is Django affected?
Yes, Django is affected in releases prior to 1.4.21, 1.7.9, 1.8.3. Upgrade your dependency to 1.4.21, 1.7.9, 1.8.3 or later.
What is the CVSS score of CVE-2015-5143?
CVE-2015-5143 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2015-5143?
CVE-2015-5143 is classified under CWE-770: Allocation of Resources Without Limits or Throttling (The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.).
How can I check PyPI dependencies for CVE-2015-5143?
Run the dependency tree command: 'pip show Django'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-h582-2pch-3xv3",
  "modified" : "2024-09-18T14:45:44Z",
  "published" : "2019-07-05T21:10:39Z",
  "aliases" : [ "CVE-2015-5143" ],
  "summary" : "Django Denial-of-service by filling session store",
  "details" : "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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "Django"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.4.21"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "Django"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.5"
      }, {
        "fixed" : "1.7.9"
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    } ]
  }, {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "Django"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
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      }, {
        "fixed" : "1.8.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2015-5143"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/django/django/commit/1828f4341ec53a8684112d24031b767eba557663"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/django/django/commit/2e47f3e401c29bc2ba5ab794d483cb0820855fb9"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/django/django/commit/66d12d1ababa8f062857ee5eb43276493720bf16"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-h582-2pch-3xv3"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/django/django"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2015-20.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://security.gentoo.org/glsa/201510-06"
  }, {
    "type" : "WEB",
    "url" : "https://www.djangoproject.com/weblog/2015/jul/08/security-releases"
  }, {
    "type" : "WEB",
    "url" : "http://lists.fedoraproject.org/pipermail/package-announce/2015-November/172084.html"
  }, {
    "type" : "WEB",
    "url" : "http://lists.opensuse.org/opensuse-updates/2015-10/msg00043.html"
  }, {
    "type" : "WEB",
    "url" : "http://lists.opensuse.org/opensuse-updates/2015-10/msg00046.html"
  }, {
    "type" : "WEB",
    "url" : "http://rhn.redhat.com/errata/RHSA-2015-1678.html"
  }, {
    "type" : "WEB",
    "url" : "http://rhn.redhat.com/errata/RHSA-2015-1686.html"
  }, {
    "type" : "WEB",
    "url" : "http://www.debian.org/security/2015/dsa-3305"
  }, {
    "type" : "WEB",
    "url" : "http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html"
  }, {
    "type" : "WEB",
    "url" : "http://www.ubuntu.com/usn/USN-2671-1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-770" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-16T21:38:54Z",
    "nvd_published_at" : null
  }
}