Apache 2.2.x < 2.2.27 Multiple Vulnerabilities

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

include("compat.inc");

if (description)
{
  script_id(73405);
  script_version("1.15");
  script_cvs_date("Date: 2018/09/17 21:46:53");

  script_cve_id("CVE-2013-6438", "CVE-2014-0098");
  script_bugtraq_id(66303);

  script_name(english:"Apache 2.2.x < 2.2.27 Multiple Vulnerabilities");
  script_summary(english:"Checks version in Server response header");

  script_set_attribute(attribute:"synopsis", value:"The remote web server is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"According to its banner, the version of Apache 2.2.x running on the
remote host is a version prior to 2.2.27. It is, therefore,
potentially affected by the following vulnerabilities :

  - A flaw exists with the 'mod_dav' module that is caused
    when tracking the length of CDATA that has leading white
    space. A remote attacker with a specially crafted DAV
    WRITE request can cause the service to stop responding.
    (CVE-2013-6438)

  - A flaw exists in 'mod_log_config' module that is caused
    when logging a cookie that has an unassigned value. A
    remote attacker with a specially crafted request can
    cause the service to crash. (CVE-2014-0098)

Note that Nessus did not actually test for these issues, but instead
has relied on the version in the server's banner.");
  script_set_attribute(attribute:"see_also", value:"https://archive.apache.org/dist/httpd/CHANGES_2.2.27");
  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 2.2.27 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:"cvss_score_source", value:"CVE-2014-0098");
  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:"2013/12/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2014/03/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2014/04/08");

  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) 2014-2018 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("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("http.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 web server");
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)?$') audit(AUDIT_VER_NOT_GRANULAR, "Apache", port, source);

# This plugin is only concerned with Apache 2.2 (and its associated development branch).
if (version !~ "^2\.2[^0-9]") audit(AUDIT_WRONG_WEB_SERVER, port, "Apache 2.2.x");

fixed = '2.2.27';
if (ver_compare(ver:version, fix:fixed) == -1)
{
  if (report_verbosity > 0)
  {
    report =
      '\n  Version source    : ' + source +
      '\n  Installed version : ' + version +
      '\n  Fixed version     : ' + fixed +
      '\n';
    security_warning(port:port, extra:report);
  }
  else security_warning(port);
  exit(0);
}
else audit(AUDIT_LISTEN_NOT_VULN, "Apache", port, version);