stunnel < 5.06 OpenSSL Multiple Vulnerabilities (POODLE)

Medium Nessus Plugin ID 78584


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


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.

- 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.

- 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.


Upgrade to stunnel version 5.06 or later.

See Also

Plugin Details

Severity: Medium

ID: 78584

File Name: stunnel_5_06.nasl

Version: $Revision: 1.11 $

Type: local

Agent: windows

Family: Windows

Published: 2014/10/20

Modified: 2016/07/29

Dependencies: 65689

Risk Information

Risk Factor: Medium


Base Score: 5

Temporal Score: 4.3

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

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

Vulnerability Information

CPE: cpe:/a:stunnel:stunnel

Required KB Items: installed_sw/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

OSVDB: 113251, 113373, 113374, 113377

CERT: 577193