CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS
Percentile
99.9%
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.
#
# (C) Tenable Network Security, Inc.
#
include("compat.inc");
if (description)
{
script_id(74421);
script_version("1.15");
script_cvs_date("Date: 2019/11/26");
script_cve_id(
"CVE-2010-5298",
"CVE-2014-0195",
"CVE-2014-0198",
"CVE-2014-0221",
"CVE-2014-0224",
"CVE-2014-3470"
);
script_bugtraq_id(
66801,
67193,
67898,
67899,
67900,
67901
);
script_xref(name:"CERT", value:"978508");
script_name(english:"stunnel < 5.02 OpenSSL Multiple Vulnerabilities");
script_summary(english:"Checks version of stunnel.exe.");
script_set_attribute(attribute:"synopsis", value:
"The remote Windows host contains a program that is affected by
multiple vulnerabilities.");
script_set_attribute(attribute:"description", value:
"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.");
script_set_attribute(attribute:"see_also", value:"https://www.stunnel.org/?page=sdf_ChangeLog");
# https://www.stunnel.org/pipermail/stunnel-announce/2014-June/000077.html
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?6ba4dbbe");
script_set_attribute(attribute:"see_also", value:"https://www.openssl.org/news/secadv/20140605.txt");
script_set_attribute(attribute:"solution", value:
"Upgrade to stunnel version 5.02 or later.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2014-0195");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"exploit_framework_core", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2014/06/05");
script_set_attribute(attribute:"patch_publication_date", value:"2014/06/09");
script_set_attribute(attribute:"plugin_publication_date", value:"2014/06/10");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/a:stunnel:stunnel");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Windows");
script_copyright(english:"This script is Copyright (C) 2014-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("stunnel_installed.nasl");
script_require_keys("installed_sw/stunnel");
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("install_func.inc");
app = 'stunnel';
install = get_single_install(app_name:app, exit_if_unknown_ver:TRUE);
version = install["version"];
path = install["path"];
# Affected < 5.02
if (
version =~ "^[0-4]($|[^0-9])" ||
version =~ "^5\.0[01]($|[^0-9])"
)
{
port = get_kb_item("SMB/transport");
if (!port) port = 445;
report =
'\n Path : ' + path +
'\n Installed version : ' + version +
'\n Fixed version : 5.02\n';
security_report_v4(severity:SECURITY_WARNING, port:port, extra:report);
}
else audit(AUDIT_INST_PATH_NOT_VULN, app, version, path);
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-5298
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0195
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0198
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0221
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0224
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3470
www.nessus.org/u?6ba4dbbe
www.openssl.org/news/secadv/20140605.txt
www.stunnel.org/?page=sdf_ChangeLog
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS
Percentile
99.9%