Squid < 2.6.STABLE7 Multiple Remote DoS

# Changes by Tenable:
#   - added script_name, revised description, added script dependency
#   - added code to only run if report paranoia is "Paranoid".
#   - fixed regex, added report function.
#   - updated title (6/25/09)
#   - changed plugin family (7/6/09)
#   - Updated to use compat.inc (11/20/2009)

include("compat.inc");

if (description)
{
  script_id(24870);
  script_version("1.18");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/12");

  script_cve_id("CVE-2007-0247", "CVE-2007-0248");
  script_bugtraq_id(22079, 22203);

  script_name(english:"Squid < 2.6.STABLE7 Multiple Remote DoS");
  script_summary(english:"Determines squid version");

  script_set_attribute(attribute:"synopsis", value:
"The remote proxy server is affected by multiple denial of service
vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"Two vulnerabilities have been reported in Squid, which can be
exploited by malicious people to cause a denial of service.");
  # http://www.squid-cache.org/Versions/v2/2.6/squid-2.6.STABLE7-RELEASENOTES.html#s12
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?69b56cc5");
  script_set_attribute(attribute:"solution", value:"Upgrade to squid 2.6.STABLE7 or newer.");
  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:POC/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(399);

  script_set_attribute(attribute:"vuln_publication_date", value:"2006/12/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2007/03/20");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:squid-cache:squid");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"(C) 2007-2020 Shu-Ting Ou <[email protected]>");
  script_family(english:"Firewalls");

  script_dependencies("proxy_use.nasl");
  script_require_keys("Settings/ParanoidReport");
  script_require_ports("Services/http_proxy",3128, 8080);

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("http_func.inc");
include("http_keepalive.inc");

if (report_paranoia < 2) audit(AUDIT_PARANOID);

port = get_kb_item("Services/http_proxy");
if(!port)port = 3128;
if(!get_port_state(port))port = 8080;

if(get_port_state(port))
{
 res = http_get_cache_ka(item:"/", port:port);
 if(res && egrep(pattern:"[Ss]quid/2\.([0-5]\.|6\.STABLE[0-6][^0-9])", string:res))
   security_warning(port);
}