OpenSSL < 0.9.8o / 1.0.0a Multiple Vulnerabilities

2010-06-03T00:00:00
ID OPENSSL_1_0_0A.NASL
Type nessus
Reporter Tenable
Modified 2018-07-16T00:00:00

Description

According to its banner, the remote web server is running a version of OpenSSL older than 0.9.8o / 1.0.0a. Such versions have the following vulnerabilities :

  • The mishandling of Cryptographic Message Syntax structures containing an OriginatorInfo element can lead to data being written to invalid memory addresses or memory being freed up twice. (CVE-2010-0742)

  • An uninitialized buffer of undefined length is returned when verification recovery fails for RSA keys. This allows an attacker to bypass key checks in applications calling the function EVP_PKEY_verify_recover(). Note this function is not used by OpenSSLcode itself. (CVE-2010-1633)

                                        
                                            #
# (C) Tenable Network Security, Inc.
#


include("compat.inc");


if (description)
{
  script_id(46801);
  script_version("1.10");
  script_cvs_date("Date: 2018/07/16 14:09:14");

  script_cve_id("CVE-2010-0742", "CVE-2010-1633");
  script_bugtraq_id(40502, 40503);
  script_xref(name:"Secunia", value:"40024");

  script_name(english:"OpenSSL < 0.9.8o / 1.0.0a Multiple Vulnerabilities");
  script_summary(english:"Does a banner check");

  script_set_attribute(
    attribute:"synopsis",
    value:"The remote web server has a SSL-related vulnerability."
  );
  script_set_attribute(
    attribute:"description",
    value:
"According to its banner, the remote web server is running a version
of OpenSSL older than 0.9.8o / 1.0.0a.  Such versions have the
following vulnerabilities :

  - The mishandling of Cryptographic Message Syntax 
    structures containing an OriginatorInfo element can 
    lead to data being written to invalid memory addresses 
    or memory being freed up twice. (CVE-2010-0742)

  - An uninitialized buffer of undefined length is returned
    when verification recovery fails for RSA keys. This 
    allows an attacker to bypass key checks in applications
    calling the function EVP_PKEY_verify_recover(). Note 
    this function is not used by OpenSSLcode itself. 
    (CVE-2010-1633)"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.openssl.org/news/secadv/20100601.txt"
  );
  script_set_attribute(
    attribute:"solution",
    value:"Upgrade to OpenSSL 0.9.8o / 1.0.0a or later."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  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:"2010/06/01");
  script_set_attribute(attribute:"patch_publication_date",value:"2010/06/01");
  script_set_attribute(attribute:"plugin_publication_date",value:"2010/06/03");
  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:openssl:openssl");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Web Servers");

  script_copyright(english:"This script is Copyright (C) 2010-2018 Tenable Network Security, Inc.");

  script_dependencie("http_version.nasl");
  script_require_ports("Services/www", 80);
  script_require_keys("Settings/ParanoidReport");

  exit(0);
}


include("global_settings.inc");
include("misc_func.inc");
include("http.inc");
include("backport.inc");


if (report_paranoia < 2)
  exit(1, "This plugin only runs if 'Report paranoia' is set to 'Paranoid'.");

port = get_http_port(default:80);

banner = get_backport_banner(banner:get_http_banner(port:port));
if (!banner) 
  exit(1, "Unable to get the banner from the web server on port "+port+".");

if (!egrep(string:banner, pattern:'^Server:'))
  exit(0, "The web server on port "+port+" doesn't return a Server response header.");
if ("OpenSSL/" >!< banner)
  exit(0, "The Server response header for the web server on port "+port+" doesn't mention OpenSSL.");

pat = "^Server:.*OpenSSL/([^ ]+)";
version = NULL;

foreach line (split(banner, sep:'\r\n', keep:FALSE))
{
  match = eregmatch(pattern:pat, string:line);
  if (!isnull(match))
  {
    version = match[1];
    break;
  }
}
if (isnull(version))
  exit(0, "The web server on port "+port+" doesn't appear to use OpenSSL.");

if (
  (version =~ "^0\.9\.([0-7]([^0-9]|$)|8([^a-z0-9]|[a-n]|$))") ||
  (version =~ "^1\.0\.0(-beta|$)")
)
{
  if (report_verbosity > 0)
  {
    report =
      '\nOpenSSL version '+version+' appears to be running on the remote\n'+
      'host based on the following Server response header :\n\n'+
      '  '+line+'\n';
    security_hole(port:port, extra:report);
  }
  else security_hole(port);
  exit(0);
}
else exit(0, 'The web server on port "+port+" uses OpenSSL '+version+', which is not affected.');