OpenSSL < 0.9.8m Multiple Vulnerabilities

This script is Copyright (C) 2010-2012 Tenable Network Security, Inc.


Synopsis :

The remote web server has multiple SSL-related vulnerabilities.

Description :

According to its banner, the remote web server uses a version of
OpenSSL older than 0.9.8m. Such versions have the following
vulnerabilities :

- Session renegotiations are not handled properly, which could
be exploited to insert arbitrary plaintext by a
man-in-the-middle. (CVE-2009-3555)

- The library does not check for a NULL return value from calls
to the bn_wexpand() function, which has unspecified impact.
(CVE-2009-3245)

- A memory leak in the zlib_stateful_finish function in crypto/comp/c_zlib.c
allows remote attackers to cause a denial of service via vectors that
trigger incorrect calls to the CRYPTO_cleanup_all_ex_data function.
(CVE-2008-1678, CVE-2009-4355)

For this vulnerability to be exploitable, compression must be enabled in OpenSSL
for SSL/TLS connections.

See also :

http://rt.openssl.org/Ticket/Display.html?id=2111&user=guest&pass=guest
http://marc.info/?l=openssl-announce&m=126714485629486&w=2

Solution :

Upgrade to OpenSSL 0.9.8m or later.

Risk factor :

Critical / CVSS Base Score : 10.0
(CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 8.3
(CVSS2#E:F/RL:OF/RC:C)
Public Exploit Available : true

Family: Web Servers

Nessus Plugin ID: 45039 ()

Bugtraq ID: 31692
36935
38562

CVE ID: CVE-2006-4343
CVE-2008-1678
CVE-2009-3245
CVE-2009-3555
CVE-2009-4355