Vulnerability identifier: #VU32401

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-5143

CWE-ID: CWE-399

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Django
Web applications / CMS

Vendor: Django Software Foundation

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

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.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Django: 1.4.1 - 1.8.2

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External links
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/172084.html
http://lists.opensuse.org/opensuse-updates/2015-10/msg00043.html
http://lists.opensuse.org/opensuse-updates/2015-10/msg00046.html
http://rhn.redhat.com/errata/RHSA-2015-1678.html
http://rhn.redhat.com/errata/RHSA-2015-1686.html
http://www.debian.org/security/2015/dsa-3305
http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html
http://www.securityfocus.com/bid/75666
http://www.securitytracker.com/id/1032820
http://www.ubuntu.com/usn/USN-2671-1
http://security.gentoo.org/glsa/201510-06
http://www.djangoproject.com/weblog/2015/jul/08/security-releases/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.