stunnel < 5.02 OpenSSL Multiple Vulnerabilities

High Nessus Plugin ID 74421

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 5.02. It is, therefore, affected by the following vulnerabilities :

- An error exists in the ssl3_read_bytes() function that allows data to be injected into other sessions or allows denial of service attacks. Note this issue is only exploitable if 'SSL_MODE_RELEASE_BUFFERS' is enabled.
(CVE-2010-5298)

- A buffer overflow error exists related to invalid DTLS fragment handling that allows an attacker to execute arbitrary code. Note this issue only affects OpenSSL when used as a DTLS client or server. (CVE-2014-0195)

- An error exists in the do_ssl3_write() function that allows a NULL pointer to be dereferenced, resulting in a denial of service condition. Note this issue is exploitable only if 'SSL_MODE_RELEASE_BUFFERS' is enabled. (CVE-2014-0198)

- An error exists related to DTLS handshake handling that could lead to denial of service attacks. Note this issue only affects OpenSSL when used as a DTLS client.
(CVE-2014-0221)

- An unspecified error exists that allows an attacker to cause usage of weak keying material, resulting in simplified man-in-the-middle attacks. (CVE-2014-0224)

- An unspecified error exists related to anonymous ECDH ciphersuites that allows an attacker to cause a denial of service condition. Note this issue only affects OpenSSL TLS clients. (CVE-2014-3470)

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 5.02 or later.

See Also

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

http://www.nessus.org/u?6ba4dbbe

https://www.openssl.org/news/secadv/20140605.txt

Plugin Details

Severity: High

ID: 74421

File Name: stunnel_5_02.nasl

Version: 1.14

Type: local

Agent: windows

Family: Windows

Published: 2014/06/10

Updated: 2018/11/15

Dependencies: 65689

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 9.3

Temporal Score: 7.7

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

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

Vulnerability Information

CPE: cpe:/a:stunnel:stunnel

Required KB Items: installed_sw/stunnel

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2014/06/09

Vulnerability Publication Date: 2014/06/05

Exploitable With

Core Impact

Reference Information

CVE: CVE-2010-5298, CVE-2014-0195, CVE-2014-0198, CVE-2014-0221, CVE-2014-0224, CVE-2014-3470

BID: 66801, 67193, 67898, 67899, 67900, 67901

CERT: 978508