MS15-031: Vulnerability in Schannel Could Allow Security Feature Bypass (3046049) (FREAK)

This script is Copyright (C) 2015-2017 Tenable Network Security, Inc.


Synopsis :

The remote Windows host is affected by a security feature bypass
vulnerability.

Description :

The remote Windows host is affected by a security feature bypass
vulnerability, known as FREAK (Factoring attack on RSA-EXPORT Keys),
due to the support of weak EXPORT_RSA cipher suites with keys less
than or equal to 512 bits. A man-in-the-middle attacker may be able to
downgrade the SSL/TLS connection to use EXPORT_RSA cipher suites which
can be factored in a short amount of time, allowing the attacker to
intercept and decrypt the traffic.

See also :

https://technet.microsoft.com/library/security/MS15-031
https://www.smacktls.com/#freak

Solution :

Microsoft has released a set of patches for Windows 2003, Vista, 2008,
7, 2008 R2, 8, 2012, 8.1, and 2012 R2.

Risk factor :

Medium / CVSS Base Score : 5.0
(CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N)
CVSS Temporal Score : 4.1
(CVSS2#E:F/RL:OF/RC:ND)
Public Exploit Available : true

Family: Windows : Microsoft Bulletins

Nessus Plugin ID: 81745 ()

Bugtraq ID: 72965

CVE ID: CVE-2015-1637

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