CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
41.8%
The Windows Druva inSync Client Service (inSyncCPHwnet64.exe) contains a path traversal vulnerability that can be exploited by a local, unauthenticated attacker to execute OS commands with SYSTEM privileges. When processing RPC type 5 requests over TCP port 6064, inSyncCPHwnet64.exe does not properly validate request data prior to passing it to the CreateProcessW() function. By sending a crafted RPC request, an attacker can elevate privileges to SYSTEM.
#
# (C) Tenable Network Security, Inc.
#
include('compat.inc');
if (description)
{
script_id(136927);
script_version("1.5");
script_set_attribute(attribute:"plugin_modification_date", value:"2020/12/29");
script_cve_id("CVE-2020-5752");
script_name(english:"Druva inSync Windows Client < 6.6.4 Privilege Escalation");
script_set_attribute(attribute:"synopsis", value:
"A web application development suite installed on the remote Windows
host is affected by local privilege escalation vulnerability.");
script_set_attribute(attribute:"description", value:
"The Windows Druva inSync Client Service (inSyncCPHwnet64.exe) contains a path
traversal vulnerability that can be exploited by a local, unauthenticated attacker
to execute OS commands with SYSTEM privileges. When processing RPC type 5
requests over TCP port 6064, inSyncCPHwnet64.exe does not properly validate request
data prior to passing it to the CreateProcessW() function. By sending a crafted RPC
request, an attacker can elevate privileges to SYSTEM.");
# https://docs.druva.com/005_inSync_Client/inSync_Client_6.6.0_for_inSync_Cloud/000Release_Details/010_Release_Notes_for_inSync_Client_v6.6.0#inSync_Client_Patch_Update_v6.6.4_for_Windows_OS
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?da4e741b");
script_set_attribute(attribute:"see_also", value:"https://www.tenable.com/security/research/tra-2020-34");
script_set_attribute(attribute:"solution", value:
"Upgrade to Druva inSync Client 6.6.4 or later.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-5752");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"metasploit_name", value:'Druva inSync inSyncCPHwnet64.exe RPC Type 5 Privilege Escalation');
script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2020/07/05");
script_set_attribute(attribute:"patch_publication_date", value:"2020/07/05");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/27");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/a:druva:insync_client");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Windows");
script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("druva_insync_client_win_installed.nbin");
script_require_keys("installed_sw/Druva inSync");
script_require_ports(139, 445);
exit(0);
}
include('vcf.inc');
get_kb_item_or_exit("SMB/Registry/Enumerated");
app_info = vcf::get_app_info(app:"Druva inSync");
constraints = [
{ 'min_version' : '6.6.0', 'fixed_version' : '6.6.4' }
];
vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_HOLE);
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
41.8%