MS09-020: Vulnerabilities in Internet Information Services (IIS) Could Allow Elevation of Privilege (970483)

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


include("compat.inc");


if (description)
{
  script_id(39342);
  script_version("1.30");
  script_cvs_date("Date: 2018/11/15 20:50:30");

  script_cve_id("CVE-2009-1122", "CVE-2009-1535");
  script_bugtraq_id(34993);
  script_xref(name:"MSFT", value:"MS09-020");
  script_xref(name:"MSKB", value:"970483");
  script_xref(name:"EDB-ID", value:"8704");

  script_name(english:"MS09-020: Vulnerabilities in Internet Information Services (IIS) Could Allow Elevation of Privilege (970483)");
  script_summary(english:"Checks version of Httpext.dll");

  script_set_attribute(attribute:"synopsis", value:"It is possible to bypass authentication on the remote web server.");
  script_set_attribute(attribute:"description", value:
"Due to a flaw in the WebDAV extension for IIS, an anonymous, remote
attacker may be able to bypass authentication by sending a specially
crafted HTTP request and gain access to a protected location.");
  script_set_attribute(attribute:"see_also", value:"https://docs.microsoft.com/en-us/security-updates/SecurityBulletins/2009/ms09-020");
  script_set_attribute(attribute:"solution", value:"Microsoft has released a set of patches for Windows 2000, XP and 2003.");
  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: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(287);

  script_set_attribute(attribute:"vuln_publication_date", value:"2009/05/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2009/06/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2009/06/10");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:microsoft:windows");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:iis");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Windows : Microsoft Bulletins");

  script_copyright(english:"This script is Copyright (C) 2009-2018 Tenable Network Security, Inc.");

  script_dependencies("smb_hotfixes.nasl", "ms_bulletin_checks_possible.nasl");
  script_require_keys("SMB/MS_Bulletin_Checks/Possible");
  script_require_ports(139, 445, 'Host/patch_management_checks');

  exit(0);
}


include("audit.inc");
include("smb_func.inc");
include("smb_hotfixes.inc");
include("smb_hotfixes_fcheck.inc");
include("misc_func.inc");

get_kb_item_or_exit("SMB/MS_Bulletin_Checks/Possible");

bulletin = 'MS09-020';
kb = "970483";

kbs = make_list(kb);
if (get_kb_item("Host/patch_management_checks")) hotfix_check_3rd_party(bulletin:bulletin, kbs:kbs, severity:SECURITY_HOLE);


get_kb_item_or_exit("SMB/Registry/Enumerated");
get_kb_item_or_exit("SMB/WindowsVersion", exit_code:1);

if (hotfix_check_sp_range(win2k:'4,5', xp:'2,3', win2003:'2') <= 0) audit(AUDIT_OS_SP_NOT_VULN);
if (hotfix_check_iis_installed() <= 0) audit(AUDIT_NOT_INST, "IIS");

rootfile = hotfix_get_systemroot();
if (!rootfile) exit(1, "Failed to get the system root.");

share = hotfix_path2share(path:rootfile);
if (!is_accessible_share(share:share)) audit(AUDIT_SHARE_FAIL, share);

if (
  # Windows 2003
  hotfix_is_vulnerable(os:"5.2", sp:2, file:"Httpext.dll", version:"6.0.3790.4518", dir:"\system32\inetsrv", bulletin:bulletin, kb:kb) ||

  # Windows XP
  hotfix_is_vulnerable(os:"5.1", sp:3, file:"Httpext.dll", version:"6.0.2600.5817", dir:"\system32\inetsrv", bulletin:bulletin, kb:kb) ||
  hotfix_is_vulnerable(os:"5.1", sp:2, file:"Httpext.dll", version:"6.0.2600.3574", dir:"\system32\inetsrv", bulletin:bulletin, kb:kb) ||

  # Windows 2000
  hotfix_is_vulnerable(os:"5.0", file:"Httpext.dll", version:"5.0.2195.7290", dir:"\system32\inetsrv", bulletin:bulletin, kb:kb)
)
{
  set_kb_item(name:"SMB/Missing/"+bulletin, value:TRUE);
  hotfix_security_hole();
  hotfix_check_fversion_end();
  exit(0);
}
else
{
  hotfix_check_fversion_end();
  audit(AUDIT_HOST_NOT, 'affected');
}