RealNetworks Helix Server < 13.0.0 Multiple Remote DoS

This script is Copyright (C) 2009-2011 Tenable Network Security, Inc.


Synopsis :

The remote media streaming server is affected by multiple denial of
service vulnerabilities.

Description :

According to its banner, The remote host is running version 12.x of
RealNetworks Helix Server / Helix Mobile Server. Such versions are
reportedly affected by multiple issues :

- By sending a specially crafted 'RTSP' (SET_PARAMETERS)
request with a 'DataConvertBuffer' parameter and either
no 'Content-Length' header or an invalid 'Content-Length'
header, an attacker may be able to crash the remote Helix
server process. (CVE-2009-2533)

- By sending a 'SETUP' request without including a '/'
character in it, a remote attacker may be able to crash
the remote Helix server process. (CVE-2009-2534)

See also :

http://www.coresecurity.com/content/real-helix-dna
http://archives.neohapsis.com/archives/bugtraq/2009-07/0122.html
http://docs.real.com/docs/security/SecurityUpdate071409HS.pdf

Solution :

Update to RealNetworks Helix Server / Helix Mobile Server 13.0.0 or later.

Risk factor :

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

Family: Misc.

Nessus Plugin ID: 40350 (helix_svr_13_multiple.nasl)

Bugtraq ID: 35731
35732

CVE ID: CVE-2009-2533
CVE-2009-2534