stunnel < 5.06 OpenSSL Multiple Vulnerabilities (POODLE)

Medium Nessus Plugin ID 78584

Synopsis

The remote Windows host contains a program that is affected by
multiple vulnerabilities.

Description

The version of stunnel installed on the remote host is prior to
version 5.06. It is, therefore, affected by the following
vulnerabilities in the bundled OpenSSL library :

- An error exists related to DTLS SRTP extension handling
and specially crafted handshake messages that can allow
denial of service attacks via memory leaks.
(CVE-2014-3513)

- An error exists related to the way SSL 3.0 handles
padding bytes when decrypting messages encrypted using
block ciphers in cipher block chaining (CBC) mode. A
man-in-the-middle attacker can decrypt a selected byte
of a cipher text in as few as 256 tries if they are able
to force a victim application to repeatedly send the
same data over newly created SSL 3.0 connections. This
is also known as the 'POODLE' issue. (CVE-2014-3566)

- An error exists related to session ticket handling that
can allow denial of service attacks via memory leaks.
(CVE-2014-3567)

- An error exists related to the build configuration
process and the 'no-ssl3' build option that allows
servers and clients to process insecure SSL 3.0
handshake messages. (CVE-2014-3568)

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

Solution

Upgrade to stunnel version 5.06 or later.

See Also

https://www.stunnel.org/?page=sdf_ChangeLog

http://www.nessus.org/u?d459ce27

https://www.openssl.org/news/openssl-1.0.1-notes.html

https://www.openssl.org/news/secadv/20141015.txt

https://www.openssl.org/news/vulnerabilities.html

https://www.imperialviolet.org/2014/10/14/poodle.html

https://www.openssl.org/~bodo/ssl-poodle.pdf

https://tools.ietf.org/html/draft-ietf-tls-downgrade-scsv-00

Plugin Details

Severity: Medium

ID: 78584

File Name: stunnel_5_06.nasl

Version: 1.13

Type: local

Agent: windows

Family: Windows

Published: 2014/10/20

Modified: 2018/11/15

Dependencies: 65689

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 5

Temporal Score: 3.7

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

Vulnerability Information

CPE: cpe:/a:stunnel:stunnel

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2014/10/15

Vulnerability Publication Date: 2014/10/14

Reference Information

CVE: CVE-2014-3513, CVE-2014-3566, CVE-2014-3567, CVE-2014-3568

BID: 70574, 70584, 70585, 70586

CERT: 577193