According to its banner, the remote web server uses a version of OpenSSL 1.0.1 prior to 1.0.1n. The OpenSSL library is, therefore, affected by the following vulnerabilities :
A denial of service vulnerability exists when processing an ECParameters structure due to an infinite loop that occurs when a specified curve is over a malformed binary polynomial field. A remote attacker can exploit this to perform a denial of service against any system that processes public keys, certificate requests, or certificates. This includes TLS clients and TLS servers with client authentication enabled. (CVE-2015-1788)
A denial of service vulnerability exists due to improper validation of the content and length of the ASN1_TIME string by the X509_cmp_time() function. A remote attacker can exploit this, via a malformed certificate and CRLs of various sizes, to cause a segmentation fault, resulting in a denial of service condition. TLS clients that verify CRLs are affected.
TLS clients and servers with client authentication enabled may be affected if they use custom verification callbacks. (CVE-2015-1789)
A NULL pointer dereference flaw exists in the PKCS#7 parsing code due to incorrect handling of missing inner ‘EncryptedContent’. This allows a remote attacker, via specially crafted ASN.1-encoded PKCS#7 blobs with missing content, to cause a denial of service condition or other potential unspecified impacts. (CVE-2015-1790)
A double-free error exists due to a race condition that occurs when a NewSessionTicket is received by a multi-threaded client when attempting to reuse a previous ticket. (CVE-2015-1791)
A denial of service vulnerability exists in the CMS code due to an infinite loop that occurs when verifying a signedData message. A remote attacker can exploit this to cause a denial of service condition. (CVE-2015-1792)
A man-in-the-middle vulnerability exists, known as Logjam, due to a flaw in the SSL/TLS protocol. A remote attacker can exploit this flaw to downgrade connections using ephemeral Diffie-Hellman key exchange to 512-bit export-grade cryptography. (CVE-2015-4000)
#
# (C) Tenable Network Security, Inc.
#
include('compat.inc');
if (description)
{
script_id(84153);
script_version("1.10");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/08/21");
script_cve_id(
"CVE-2015-1788",
"CVE-2015-1789",
"CVE-2015-1790",
"CVE-2015-1791",
"CVE-2015-1792",
"CVE-2015-4000"
);
script_bugtraq_id(
74733,
75154,
75156,
75157,
75158,
75161
);
script_xref(name:"CEA-ID", value:"CEA-2021-0004");
script_name(english:"OpenSSL 1.0.1 < 1.0.1n Multiple Vulnerabilities (Logjam)");
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 1.0.1n. The OpenSSL library is, therefore,
affected by the following vulnerabilities :
- A denial of service vulnerability exists when processing
an ECParameters structure due to an infinite loop that
occurs when a specified curve is over a malformed binary
polynomial field. A remote attacker can exploit this to
perform a denial of service against any system that
processes public keys, certificate requests, or
certificates. This includes TLS clients and TLS servers
with client authentication enabled. (CVE-2015-1788)
- A denial of service vulnerability exists due to improper
validation of the content and length of the
ASN1_TIME string by the X509_cmp_time() function. A
remote attacker can exploit this, via a malformed
certificate and CRLs of various sizes, to cause a
segmentation fault, resulting in a denial of service
condition. TLS clients that verify CRLs are affected.
TLS clients and servers with client authentication
enabled may be affected if they use custom verification
callbacks. (CVE-2015-1789)
- A NULL pointer dereference flaw exists in the PKCS#7
parsing code due to incorrect handling of missing inner
'EncryptedContent'. This allows a remote attacker, via
specially crafted ASN.1-encoded PKCS#7 blobs with
missing content, to cause a denial of service condition
or other potential unspecified impacts. (CVE-2015-1790)
- A double-free error exists due to a race condition that
occurs when a NewSessionTicket is received by a
multi-threaded client when attempting to reuse a
previous ticket. (CVE-2015-1791)
- A denial of service vulnerability exists in the CMS code
due to an infinite loop that occurs when verifying a
signedData message. A remote attacker can exploit this
to cause a denial of service condition. (CVE-2015-1792)
- A man-in-the-middle vulnerability exists, known as
Logjam, due to a flaw in the SSL/TLS protocol. A remote
attacker can exploit this flaw to downgrade connections
using ephemeral Diffie-Hellman key exchange to 512-bit
export-grade cryptography. (CVE-2015-4000)");
script_set_attribute(attribute:"see_also", value:"https://www.openssl.org/news/secadv/20150611.txt");
script_set_attribute(attribute:"see_also", value:"https://weakdh.org/");
script_set_attribute(attribute:"solution", value:
"Upgrade to OpenSSL 1.0.1n 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:U/RL:OF/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2015-1791");
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:"2015/05/20");
script_set_attribute(attribute:"patch_publication_date", value:"2015/06/11");
script_set_attribute(attribute:"plugin_publication_date", value:"2015/06/12");
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 Tenable Network Security, Inc.");
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' : '1.0.1n'}];
vcf::openssl::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_WARNING);
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1788
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1789
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1790
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1791
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1792
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-4000
weakdh.org/
www.openssl.org/news/secadv/20150611.txt