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

Low Nessus Plugin ID 87538


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


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.


Upgrade to IBM HTTP Server / / or or later.

See Also

Plugin Details

Severity: Low

ID: 87538

File Name: ibm_http_server_bar_mitzvah.nasl

Version: $Revision: 1.4 $

Type: remote

Family: Web Servers

Published: 2015/12/21

Modified: 2016/11/23

Dependencies: 10107

Risk Information

Risk Factor: Low


Base Score: 2.6

Temporal Score: 2.2

Vector: CVSS2#AV:N/AC:H/Au:N/C:P/I:N/A:N

Temporal Vector: CVSS2#E:F/RL:TF/RC:ND

Vulnerability Information

CPE: cpe:/a:ibm:http_server

Required KB Items: www/ibm-http, Settings/ParanoidReport

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2015/04/09

Vulnerability Publication Date: 2015/01/19

Reference Information

CVE: CVE-2015-2808

BID: 73684

OSVDB: 117855