Apache 2.2.x < 2.2.17 Multiple Vulnerabilities

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


include("compat.inc");

if (description)
{
  script_id(50070);
  script_cvs_date("Date: 2018/06/29 12:01:03");
  script_version("1.16");

  script_cve_id("CVE-2009-3560", "CVE-2009-3720", "CVE-2010-1623");
  script_bugtraq_id(37203, 36097, 43673);
  script_xref(name:"Secunia", value:"41701");

  script_name(english:"Apache 2.2.x < 2.2.17 Multiple Vulnerabilities");
  script_summary(english:"Checks version in Server response header.");
 
 script_set_attribute(attribute:"synopsis", value:
"The remote web server may be affected by several issues.");
 script_set_attribute(attribute:"description", value:
"According to its banner, the version of Apache 2.2.x running on the
remote host is prior to 2.2.17. It is, therefore, affected by the
following vulnerabilities :

  - Errors exist in the bundled expat library that may allow
    an attacker to crash the server when a buffer is over-
    read when parsing an XML document. (CVE-2009-3720 and
    CVE-2009-3560)

  - An error exists in the 'apr_brigade_split_line' 
    function in the bundled APR-util library. Carefully
    timed bytes in requests result in gradual memory
    increases leading to a denial of service. 
    (CVE-2010-1623)
 
Note that the remote web server may not actually be affected by these
vulnerabilities. Nessus did not try to determine whether the affected
modules are in use or to check for the issues themselves.");
  script_set_attribute(attribute:"see_also", value:"https://archive.apache.org/dist/httpd/CHANGES_2.2.17");
  script_set_attribute(attribute:"see_also", value:"http://httpd.apache.org/security/vulnerabilities_22.html");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Apache version 2.2.17 or later. Alternatively, ensure that
the affected modules are not in use.");
  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_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(119);
  script_set_attribute(attribute:"vuln_publication_date", value:"2009/01/17");
  script_set_attribute(attribute:"patch_publication_date", value:"2010/10/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2010/10/20");
  script_set_attribute(attribute:"plugin_type", value: "remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:apache:http_server");
  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_dependencies("apache_http_version.nasl");
  script_require_keys("installed_sw/Apache");
  script_require_ports("Services/www", 80);

  exit(0);
}

include("global_settings.inc");
include("misc_func.inc");
include("http.inc");
include("audit.inc");
include("install_func.inc");

get_install_count(app_name:"Apache", exit_if_zero:TRUE);
port = get_http_port(default:80);
install = get_single_install(app_name:"Apache", port:port, exit_if_unknown_ver:TRUE);

# Check if we could get a version first, then check if it was
# backported
version = get_kb_item_or_exit('www/apache/'+port+'/version', exit_code:1);
backported = get_kb_item_or_exit('www/apache/'+port+'/backported', exit_code:1);

if (report_paranoia < 2 && backported) audit(AUDIT_BACKPORT_SERVICE, port, "Apache");
source = get_kb_item_or_exit('www/apache/'+port+'/source', exit_code:1);

# Check if the version looks like either ServerTokens Major/Minor
# was used
if (version =~ '^2(\\.2)?$') exit(1, "The banner from the Apache server listening on port "+port+" - "+source+" - is not granular enough to make a determination.");
if (version !~ "^\d+(\.\d+)*$") exit(1, "The version of Apache listening on port " + port + " - " + version + " - is non-numeric and, therefore, cannot be used to make a determination.");
if (version =~ '^2\\.2' && ver_compare(ver:version, fix:'2.2.17') == -1)
{
  if (report_verbosity > 0)
  {
    report = 
      '\n  Version source    : ' + source +
      '\n  Installed version : ' + version +
      '\n  Fixed version     : 2.2.17\n';
    security_warning(port:port, extra:report);
  }
  else security_warning(port);
  exit(0);
}
else audit(AUDIT_LISTEN_NOT_VULN, "Apache", port, install["version"]);