IBM HTTP Server SSL/TLS RC4 Stream Cipher Key Invariance (Bar Mitzvah)

This script is Copyright (C) 2015-2016 Tenable Network Security, Inc.


Synopsis :

The remote web server is affected by a security feature bypass
vulnerability.

Description :

According to its banner, the version of IBM HTTP Server running on the
remote host is affected by a security feature bypass vulnerability,
known as Bar Mitzvah, due to improper combination of state data with
key data by the RC4 cipher algorithm during the initialization phase.
A man-in-the-middle attacker can exploit this, via a brute-force
attack using LSB values, to decrypt the traffic.

Note that Nessus has not tested for this issue but has instead relied
only on the application's self-reported version number.

See also :

http://www-01.ibm.com/support/docview.wss?uid=swg21701072
http://www-01.ibm.com/support/docview.wss?uid=swg24039770
http://www.nessus.org/u?4bbf45ac

Solution :

Upgrade to IBM HTTP Server 7.0.0.39 / 8.0.0.11 / or 8.5.5.6 or later.

Risk factor :

Low / CVSS Base Score : 2.6
(CVSS2#AV:N/AC:H/Au:N/C:P/I:N/A:N)
CVSS Temporal Score : 2.2
(CVSS2#E:F/RL:TF/RC:ND)
Public Exploit Available : true

Family: Web Servers

Nessus Plugin ID: 87538 ()

Bugtraq ID: 73684

CVE ID: CVE-2015-2808

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