According to its banner, the remote web server uses a version of OpenSSL 1.0.1 prior to 1.0.1k. The OpenSSL library is, therefore, affected by the following vulnerabilities :
A NULL pointer dereference flaw exists when the SSLv3 option isn’t enabled and an SSLv3 ClientHello is received. This allows a remote attacker, using an unexpected handshake, to crash the daemon, resulting in a denial of service. (CVE-2014-3569)
The BIGNUM squaring (BN_sqr) implementation does not properly calculate the square of a BIGNUM value. This allows remote attackers to defeat cryptographic protection mechanisms. (CVE-2014-3570)
A NULL pointer dereference flaw exists with dtls1_get_record() when handling DTLS messages. A remote attacker, using a specially crafted DTLS message, can cause a denial of service. (CVE-2014-3571)
A flaw exists with ECDH handshakes when using an ECDSA certificate without a ServerKeyExchange message. This allows a remote attacker to trigger a loss of forward secrecy from the ciphersuite. (CVE-2014-3572)
A flaw exists when accepting non-DER variations of certificate signature algorithms and signature encodings due to a lack of enforcement of matches between signed and unsigned portions. A remote attacker, by including crafted data within a certificate’s unsigned portion, can bypass fingerprint-based certificate-blacklist protection mechanisms. (CVE-2014-8275)
A security feature bypass vulnerability, known as FREAK (Factoring attack on RSA-EXPORT Keys), exists due to the support of weak EXPORT_RSA cipher suites with keys less than or equal to 512 bits. A man-in-the-middle attacker may be able to downgrade the SSL/TLS connection to use EXPORT_RSA cipher suites which can be factored in a short amount of time, allowing the attacker to intercept and decrypt the traffic. (CVE-2015-0204)
A flaw exists when accepting DH certificates for client authentication without the CertificateVerify message.
This allows a remote attacker to authenticate to the service without a private key. (CVE-2015-0205)
A memory leak occurs in dtls1_buffer_record() when handling a saturation of DTLS records containing the same number sequence but for the next epoch. This allows a remote attacker to cause a denial of service.
(CVE-2015-0206)
#
# (C) Tenable Network Security, Inc.
#
include("compat.inc");
if (description)
{
script_id(80568);
script_version("1.16");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/08/21");
script_cve_id(
"CVE-2014-3569",
"CVE-2014-3570",
"CVE-2014-3571",
"CVE-2014-3572",
"CVE-2014-8275",
"CVE-2015-0204",
"CVE-2015-0205",
"CVE-2015-0206"
);
script_bugtraq_id(
71934,
71935,
71936,
71937,
71939,
71940,
71941,
71942
);
script_xref(name:"CERT", value:"243585");
script_name(english:"OpenSSL 1.0.1 < 1.0.1k Multiple Vulnerabilities (FREAK)");
script_summary(english:"Performs a banner check.");
script_set_attribute(attribute:"synopsis", value:
"The remote service is affected by multiple vulnerabilities.");
script_set_attribute(attribute:"description", value:
"According to its banner, the remote web server uses a version of
OpenSSL 1.0.1 prior to 1.0.1k. The OpenSSL library is, therefore,
affected by the following vulnerabilities :
- A NULL pointer dereference flaw exists when the SSLv3
option isn't enabled and an SSLv3 ClientHello is
received. This allows a remote attacker, using an
unexpected handshake, to crash the daemon, resulting in
a denial of service. (CVE-2014-3569)
- The BIGNUM squaring (BN_sqr) implementation does not
properly calculate the square of a BIGNUM value. This
allows remote attackers to defeat cryptographic
protection mechanisms. (CVE-2014-3570)
- A NULL pointer dereference flaw exists with
dtls1_get_record() when handling DTLS messages. A remote
attacker, using a specially crafted DTLS message, can
cause a denial of service. (CVE-2014-3571)
- A flaw exists with ECDH handshakes when using an ECDSA
certificate without a ServerKeyExchange message. This
allows a remote attacker to trigger a loss of forward
secrecy from the ciphersuite. (CVE-2014-3572)
- A flaw exists when accepting non-DER variations of
certificate signature algorithms and signature encodings
due to a lack of enforcement of matches between signed
and unsigned portions. A remote attacker, by including
crafted data within a certificate's unsigned portion,
can bypass fingerprint-based certificate-blacklist
protection mechanisms. (CVE-2014-8275)
- A security feature bypass vulnerability, known as FREAK
(Factoring attack on RSA-EXPORT Keys), exists due to the
support of weak EXPORT_RSA cipher suites with keys less
than or equal to 512 bits. A man-in-the-middle attacker
may be able to downgrade the SSL/TLS connection to use
EXPORT_RSA cipher suites which can be factored in a
short amount of time, allowing the attacker to intercept
and decrypt the traffic. (CVE-2015-0204)
- A flaw exists when accepting DH certificates for client
authentication without the CertificateVerify message.
This allows a remote attacker to authenticate to the
service without a private key. (CVE-2015-0205)
- A memory leak occurs in dtls1_buffer_record()
when handling a saturation of DTLS records containing
the same number sequence but for the next epoch. This
allows a remote attacker to cause a denial of service.
(CVE-2015-0206)");
script_set_attribute(attribute:"see_also", value:"https://www.openssl.org/news/openssl-1.0.1-notes.html");
script_set_attribute(attribute:"see_also", value:"https://www.openssl.org/news/secadv/20150108.txt");
script_set_attribute(attribute:"see_also", value:"https://www.openssl.org/news/vulnerabilities.html");
script_set_attribute(attribute:"see_also", value:"https://www.smacktls.com/#freak");
script_set_attribute(attribute:"solution", value:
"Upgrade to OpenSSL 1.0.1k or later.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2015-0205");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"in_the_news", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2014/10/21");
script_set_attribute(attribute:"patch_publication_date", value:"2015/01/08");
script_set_attribute(attribute:"plugin_publication_date", value:"2015/01/16");
script_set_attribute(attribute:"plugin_type", value:"combined");
script_set_attribute(attribute:"cpe", value:"cpe:/a:openssl:openssl");
script_set_attribute(attribute:"agent", value:"all");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Web Servers");
script_copyright(english:"This script is Copyright (C) 2015-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("openssl_version.nasl", "openssl_nix_installed.nbin", "openssl_win_installed.nbin");
script_require_keys("installed_sw/OpenSSL");
exit(0);
}
include('vcf.inc');
include('vcf_extras_openssl.inc');
var app_info = vcf::combined_get_app_info(app:'OpenSSL');
vcf::check_all_backporting(app_info:app_info);
var constraints = [{ 'min_version' : "1.0.1", 'fixed_version' : '1.0.1k'}];
vcf::openssl::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_WARNING);
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3569
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3570
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3571
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3572
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-8275
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0204
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0205
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0206
www.openssl.org/news/openssl-1.0.1-notes.html
www.openssl.org/news/secadv/20150108.txt
www.openssl.org/news/vulnerabilities.html
www.smacktls.com/#freak