Microsoft .NET Framework XML HMAC Truncation Vulnerability (981343)

# SPDX-FileCopyrightText: 2010 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.902193");
  script_version("2026-04-28T06:28:06+0000");
  script_tag(name:"last_modification", value:"2026-04-28 06:28:06 +0000 (Tue, 28 Apr 2026)");
  script_tag(name:"creation_date", value:"2010-06-09 17:19:57 +0200 (Wed, 09 Jun 2010)");
  script_cve_id("CVE-2009-0217");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:P/A:N");
  script_name("Microsoft .NET Framework XML HMAC Truncation Vulnerability (981343)");
  script_xref(name:"URL", value:"http://support.microsoft.com/kb/981343");
  script_xref(name:"URL", value:"http://www.vupen.com/english/advisories/2010/1398");
  script_xref(name:"URL", value:"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-041");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2010 Greenbone AG");
  script_family("Windows : Microsoft Bulletins");
  script_dependencies("secpod_reg_enum.nasl");
  script_require_ports(139, 445);
  script_mandatory_keys("SMB/registry_enumerated");

  script_tag(name:"impact", value:"Successful exploitation will allow the attackers to forge an XML signature that
  will be accepted as valid or to bypass security restrictions.");
  script_tag(name:"affected", value:"- Microsoft .NET Framework 3.5/SP 1

  - Microsoft .NET Framework 1.1 SP 1

  - Microsoft .NET Framework 1.0 SP 3

  - Microsoft .NET Framework 2.0 SP 1/SP 2");
  script_tag(name:"insight", value:"The issue is caused by an error in the XML Signature Syntax and Processing
  (XMLDsig) implementation that rely on the 'HMACOutputLength' parameter to
  determine the number of bytes of the signature to be verified.");
  script_tag(name:"solution", value:"The vendor has released updates. Please see the references for more information.");
  script_tag(name:"summary", value:"This host is missing a critical security update according to
  Microsoft Bulletin MS10-041.");
  script_tag(name:"qod_type", value:"executable_version");
  script_tag(name:"solution_type", value:"VendorFix");
  exit(0);
}


include("smb_nt.inc");
include("secpod_reg.inc");
include("version_func.inc");
include("secpod_smb_func.inc");
include("http_func.inc");

if(hotfix_check_sp(xp:4, win2k:5, win2003:3,  winVista:3, win2008:3, win7:1) <= 0){
  exit(0);
}

# MS10-041 Hotfix check
if((hotfix_missing(name:"979907") == 0)|| (hotfix_missing(name:"979906") == 0)||
   (hotfix_missing(name:"979909") == 0)|| (hotfix_missing(name:"979904") == 0)||
   (hotfix_missing(name:"982865") == 0)|| (hotfix_missing(name:"979913") == 0)||
   (hotfix_missing(name:"979911") == 0)|| (hotfix_missing(name:"979910") == 0)||
   (hotfix_missing(name:"979916") == 0 )){
    exit(0);
}

key  = "SOFTWARE\Microsoft\Windows\CurrentVersion\SharedDlls\";
if(registry_key_exists(key:key))
{
  foreach dllPath (registry_enum_values(key:key))
  {
    if((".NET" >< dllPath) && ("System.Security.dll" >< dllPath))
    {
      share = ereg_replace(pattern:"([a-zA-Z]):.*", replace:"\1$", string:dllPath);
      file = ereg_replace(pattern:"[a-zA-Z]:(.*)", replace:"\1", string:dllPath);

      dllVer = GetVer(file:file, share:toupper(share));
      if(!isnull(dllVer))
      {
        if(version_in_range(version:dllVer, test_version:"1.1",test_version2:"1.1.4322.2462")||
           version_in_range(version:dllVer, test_version:"2.0.50727.1000",test_version2:"2.0.50727.1878")||
           version_in_range(version:dllVer, test_version:"2.0.50727.4000",test_version2:"2.0.50727.4433"))
        {
          security_message( port: 0, data: "The target host was found to be vulnerable" );
          exit(0);
        }
      }
    }
  }
}

key = "SOFTWARE\Microsoft\ASP.NET\";
if(!registry_key_exists(key:key)){
  exit(0);
}

foreach item (registry_enum_keys(key:key))
{
  path = registry_get_sz(key:key + item, item:"Path");
  if("\Microsoft.NET\Framework" >< path)
  {
    dllVer = fetch_file_version(sysPath:path, file_name:"system.security.dll");
    if(dllVer)
    {
      if(hotfix_check_sp(winVista:3, win2008:3) > 0)
      {
        if(version_in_range(version:dllVer, test_version:"1.1",test_version2:"1.1.4322.2462")||
           version_in_range(version:dllVer, test_version:"2.0.50727.1000", test_version2:"2.0.50727.1877")||
           version_in_range(version:dllVer, test_version:"2.0.50727.3000", test_version2:"2.0.50727.3612")||
           version_in_range(version:dllVer, test_version:"2.0.50727.4000", test_version2:"2.0.50727.4203")||
           version_in_range(version:dllVer, test_version:"2.0.50727.4400", test_version2:"2.0.50727.4433"))
        {
          security_message( port: 0, data: "The target host was found to be vulnerable" );
          exit(0);
        }
      }

      if(hotfix_check_sp(win7:1) > 0)
      {
        if(version_in_range(version:dllVer, test_version:"2.0.50727.4000", test_version2:"2.0.50727.4950")||
           version_in_range(version:dllVer, test_version:"2.0.50727.5000", test_version2:"2.0.50727.5006"))
        {
          security_message( port: 0, data: "The target host was found to be vulnerable" );
          exit(0);
        }
      }
    }
  }
}