1.9 Low
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:L/AC:M/Au:N/C:N/I:P/A:N
0.0004 Low
EPSS
Percentile
9.5%
The remote Windows host is affected by a security bypass vulnerability in Windows Hyper-V due to improper application of access control list (ACL) configuration settings. A local attacker can exploit this, via a specially crafted application, to cause Hyper-V to allow unintended network traffic.
#
# (C) Tenable Network Security, Inc.
#
include("compat.inc");
if (description)
{
script_id(85848);
script_version("1.12");
script_cvs_date("Date: 2019/11/22");
script_cve_id("CVE-2015-2534");
script_bugtraq_id(76604);
script_xref(name:"MSFT", value:"MS15-105");
script_xref(name:"MSKB", value:"3081455");
script_xref(name:"MSKB", value:"3087088");
script_name(english:"MS15-105: Vulnerability in Windows Hyper-V Could Allow Security Feature Bypass (3091287)");
script_summary(english:"Checks the version of vmsntfy.dll.");
script_set_attribute(attribute:"synopsis", value:
"The remote Windows host is affected by a security bypass
vulnerability.");
script_set_attribute(attribute:"description", value:
"The remote Windows host is affected by a security bypass vulnerability
in Windows Hyper-V due to improper application of access control list
(ACL) configuration settings. A local attacker can exploit this, via a
specially crafted application, to cause Hyper-V to allow unintended
network traffic.");
script_set_attribute(attribute:"see_also", value:"https://docs.microsoft.com/en-us/security-updates/SecurityBulletins/2015/ms15-105");
script_set_attribute(attribute:"solution", value:
"Microsoft has released a set of patches for Windows 8.1, 2012 R2, and
10.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:N/I:P/A:N");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2015-2534");
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:"2015/09/08");
script_set_attribute(attribute:"patch_publication_date", value:"2015/09/08");
script_set_attribute(attribute:"plugin_publication_date", value:"2015/09/08");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:microsoft:windows");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Windows : Microsoft Bulletins");
script_copyright(english:"This script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("smb_hotfixes.nasl", "wmi_enum_server_features.nbin", "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_hotfixes_fcheck.inc");
include("smb_hotfixes.inc");
include("smb_func.inc");
include("smb_reg_query.inc");
include("misc_func.inc");
get_kb_item_or_exit("SMB/MS_Bulletin_Checks/Possible");
bulletin = 'MS15-105';
kbs = make_list('3081455', '3087088');
if (get_kb_item("Host/patch_management_checks")) hotfix_check_3rd_party(bulletin:bulletin, kbs:kbs, severity:SECURITY_NOTE);
get_kb_item_or_exit("SMB/Registry/Enumerated");
get_kb_item_or_exit("SMB/WindowsVersion", exit_code:1);
if (hotfix_check_sp_range(win81:'0', win10:'0') <= 0) audit(AUDIT_OS_SP_NOT_VULN);
# (Hyper-V ID = 20)
if (!get_kb_item('WMI/server_feature/20'))
{
# could not determine if Hyper-V was enabled via wmi, so now check with registry
# This is the key for the version of the integration services installer files,
# which are only on the Hyper-V host.
# Connect to remote registry.
registry_init();
hklm = registry_hive_connect(hive:HKEY_LOCAL_MACHINE, exit_on_fail:TRUE);
hyperv_reg = get_registry_value(handle:hklm, item:"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Virtualization\GuestInstaller\Version\Microsoft-Hyper-V-Guest-Installer");
RegCloseKey(handle:hklm);
close_registry(close:FALSE);
if (!hyperv_reg)
{
NetUseDel();
exit(0, "Systems without the Hyper-V role enabled are not affected by the vulnerability.");
}
}
share = hotfix_get_systemdrive(as_share:TRUE, exit_on_fail:TRUE);
if (!is_accessible_share(share:share)) audit(AUDIT_SHARE_FAIL, share);
if (
# Windows 8.1 / Windows Server 2012 R2
hotfix_is_vulnerable(os:"6.3", sp:0, arch:"x64", file:"vmswitch.sys", version:"6.3.9600.18005", min_version:"6.3.9600.16000", dir:"\system32\drivers", bulletin:bulletin, kb:"3087088") ||
# Windows 10
hotfix_is_vulnerable(os:"10", sp:0, arch:"x64", file:"vmsif.dll", version:"10.0.10240.16384", min_version:"10.0.10240.16000", dir:"\system32", bulletin:bulletin, kb:"3081455")
)
{
set_kb_item(name:'SMB/Missing/'+bulletin, value:TRUE);
hotfix_security_note();
hotfix_check_fversion_end();
exit(0);
}
else
{
hotfix_check_fversion_end();
audit(AUDIT_HOST_NOT, 'affected');
}