stunnel < 5.06 OpenSSL Multiple Vulnerabilities (POODLE)

medium Nessus Plugin ID 78584
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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: 1.14

Type: local

Agent: windows

Family: Windows

Published: 10/20/2014

Updated: 11/25/2019

Dependencies: stunnel_installed.nasl

Risk Information

CVSS Score Source: CVE-2014-3568

VPR

Risk Factor: Medium

Score: 5.7

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N

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

Vulnerability Information

CPE: cpe:/a:stunnel:stunnel

Required KB Items: installed_sw/stunnel

Exploit Ease: No known exploits are available

Patch Publication Date: 10/15/2014

Vulnerability Publication Date: 10/14/2014

Reference Information

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

BID: 70574, 70584, 70585, 70586

CERT: 577193