According to its banner, the remote web server is running a version of OpenSSL 1.0.1 earlier than 1.0.1c. As such, the OpenSSL library itself is reportedly affected by a denial of service vulnerability.
An integer underflow error exists in the file โssl/d1_enc.cโ in the function โdtls1_encโ. When in CBC mode, TLS/DTLS record length values and explicit initialization vector length values related to TLS/DTLS packets are not handled properly, which can lead to memory corruption and application crashes.
#
# (C) Tenable Network Security, Inc.
#
include("compat.inc");
if (description)
{
script_id(59078);
script_version("1.9");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/08/21");
script_cve_id("CVE-2012-2333");
script_bugtraq_id(53476);
script_name(english:"OpenSSL 1.0.1 < 1.0.1c TLS/DTLS CBC Denial of Service");
script_summary(english:"Does a banner check");
script_set_attribute(
attribute:"synopsis",
value:"The remote host may be affected by a denial of service vulnerability."
);
script_set_attribute(
attribute:"description",
value:
"According to its banner, the remote web server is running a version
of OpenSSL 1.0.1 earlier than 1.0.1c. As such, the OpenSSL library
itself is reportedly affected by a denial of service vulnerability.
An integer underflow error exists in the file 'ssl/d1_enc.c' in the
function 'dtls1_enc'. When in CBC mode, TLS/DTLS record length values and
explicit initialization vector length values related to TLS/DTLS
packets are not handled properly, which can lead to memory corruption and
application crashes."
);
script_set_attribute(attribute:"see_also", value:"https://www.openssl.org/news/secadv/20120510.txt");
script_set_attribute(attribute:"see_also", value:"https://www.openssl.org/news/changelog.html");
script_set_attribute(attribute:"see_also", value:"http://cvs.openssl.org/chngview?cn=22547");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=820686");
script_set_attribute(attribute:"solution", value:"Upgrade to OpenSSL 1.0.1c or later.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2012-2333");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"vuln_publication_date", value:"2012/05/10");
script_set_attribute(attribute:"patch_publication_date", value:"2012/05/10");
script_set_attribute(attribute:"plugin_publication_date", value:"2012/05/11");
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) 2012-2023 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' : '1.0.1c'}];
vcf::openssl::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_WARNING);