MS11-020: Vulnerability in SMB Server Could Allow Remote Code Execution (2508429)

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

include("compat.inc");

if (description)
{
  script_id(53377);
  script_version("1.16");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/08/05");

  script_cve_id("CVE-2011-0661");
  script_bugtraq_id(47198);
  script_xref(name:"IAVA", value:"2011-A-0050-S");
  script_xref(name:"MSFT", value:"MS11-020");
  script_xref(name:"MSKB", value:"2508429");

  script_name(english:"MS11-020: Vulnerability in SMB Server Could Allow Remote Code Execution (2508429)");
  script_summary(english:"Checks version of Srv.sys");

  script_set_attribute(
    attribute:"synopsis",
    value:
"It is possible to execute arbitrary code on the remote Windows host due
to flaws in its SMB implementation."
  );
  script_set_attribute(
    attribute:"description",
    value:
"The remote host is affected by a vulnerability in the SMB server that
may allow an attacker to execute arbitrary code or perform a denial of
service against the remote host."
  );
  # https://docs.microsoft.com/en-us/security-updates/SecurityBulletins/2011/ms11-020
  script_set_attribute(attribute:"see_also", value:"https://www.nessus.org/u?c0a773fa");
  script_set_attribute(
    attribute:"solution",
    value:
"Microsoft has released a set of patches for Windows XP, Vista, 2008, 7,
and 2008 R2."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2011-0661");
  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:"2011/04/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2011/04/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2011/04/13");

  script_set_attribute(attribute:"plugin_type", value:"local");

  script_set_attribute(attribute:"cpe", value:"cpe:/o:microsoft:windows");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);

  script_copyright(english:"This script is Copyright (C) 2011-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Windows : Microsoft Bulletins");

  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 = 'MS11-020';
kb = '2508429';

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(xp:'3', win2003:'2', vista:'1,2', win7:'0,1') <= 0) audit(AUDIT_OS_SP_NOT_VULN);

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 7 and Windows Server 2008 R2
  hotfix_is_vulnerable(os:"6.1", sp:0, file:"Srv.sys", version:"6.1.7600.20907", min_version:"6.1.7600.20000", dir:"\system32\drivers", bulletin:bulletin, kb:kb) ||
  hotfix_is_vulnerable(os:"6.1", sp:0, file:"Srv.sys", version:"6.1.7600.16765",                               dir:"\system32\drivers", bulletin:bulletin, kb:kb) ||
  hotfix_is_vulnerable(os:"6.1", sp:1, file:"Srv.sys", version:"6.1.7601.21666", min_version:"6.1.7601.20000", dir:"\system32\drivers", bulletin:bulletin, kb:kb) ||
  hotfix_is_vulnerable(os:"6.1", sp:1, file:"Srv.sys", version:"6.1.7601.17565",                               dir:"\system32\drivers", bulletin:bulletin, kb:kb) ||

  # Vista / Windows 2008
  hotfix_is_vulnerable(os:"6.0", sp:2, file:"Srv.sys", version:"6.0.6002.22592", min_version:"6.0.6002.20000", dir:"\system32\drivers", bulletin:bulletin, kb:kb) ||
  hotfix_is_vulnerable(os:"6.0", sp:2, file:"Srv.sys", version:"6.0.6002.18407",                               dir:"\system32\drivers", bulletin:bulletin, kb:kb) ||
  hotfix_is_vulnerable(os:"6.0", sp:1, file:"Srv.sys", version:"6.0.6001.22857", min_version:"6.0.6001.20000", dir:"\system32\drivers", bulletin:bulletin, kb:kb) ||
  hotfix_is_vulnerable(os:"6.0", sp:1, file:"Srv.sys", version:"6.0.6001.18602",                               dir:"\system32\drivers", bulletin:bulletin, kb:kb) ||

  # Windows 2003 / XP x64
  hotfix_is_vulnerable(os:"5.2", sp:2, file:"Srv.sys", version:"5.2.3790.4832",                                dir:"\system32\drivers", bulletin:bulletin, kb:kb) ||

  # Windows XP x86
  hotfix_is_vulnerable(os:"5.1", sp:3, file:"Srv.sys", version:"5.1.2600.6082",                                dir:"\system32\drivers", 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');
}