#VU1605 Timing attack in Django - CVE-2016-2513

Vulnerability identifier: #VU1605

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-2513

CWE-ID: CWE-208

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Django
Web applications / CMS

Vendor: Django Software Foundation

Description
The vulnerability allows a remote attacker to obtain potentially sensitive information on the target system.

The weakness exists in the password hasher in contrib/auth/hashers.py due to creating a timing difference between a login request for a user with a password encoded in an older number of iterations and login request for a nonexistent user. A remote attacker can enumerate users via a timing attack involving login requests.

Mitigation
Update to version 1.8.10 or 1.9.3.

Vulnerable software versions

Django: 1.8.0 - 1.9.2

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External links
https://www.djangoproject.com/weblog/2016/mar/01/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.