VDB-97365 · CVE-2017-6409 · BID 96504

Veritas NetBackup 6.x/7.x/8.0 Corba Interface access control

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.4	$0-$5k	0.00

A vulnerability, which was classified as critical, was found in Veritas NetBackup 6.x/7.x/8.0 (Backup Software). This affects some unknown functionality of the component Corba Interface. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

An issue was discovered in Veritas NetBackup 8.0 and earlier and NetBackup Appliance 3.0 and earlier. Unauthenticated CORBA interfaces permit inappropriate access.

The bug was discovered 03/01/2017. The weakness was published 03/01/2017 by Sven Blumenstein, Xiaoran Wang and Andrew Griffiths with Google as Veritas NetBackup v6.x, v7.x, v8.0 and NetBackup appliances v2.x, v3.0 - Multiple Critical Vulnerabilities as not defined mailinglist post (Full-Disclosure). The advisory is shared at seclists.org. The public release happened without involvement of Veritas. This vulnerability is uniquely identified as CVE-2017-6409 since 03/01/2017. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are unknown but a public exploit is available. MITRE ATT&CK project uses the attack technique T1068 for this issue. The advisory points out:

Multiple critical vulnerabilities were identified in Veritas NetBackup and NetBackup appliance. The vulnerabilities were discovered during a black box security assessment and therefore the vulnerability list should not be considered exhaustive.

A public exploit has been developed by Sven Blumenstein/Xiaoran Wang/Andrew Griffiths and been published immediately after the advisory. The exploit is shared for download at seclists.org. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 92 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 104888 (Veritas NetBackup Appliance < 2.7.2 / 3.1.0 Multiple Vulnerabilities (VTS17-003)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CGI abuses and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370336 (Veritas NetBackup Multiple Vulnerabilities.(VTS17-003)). The code used by the exploit is:

echo -ne
'extension=nbjm\x0a\x0aGIOP\x01\x02\x01\x00d\x00\x00\x00\x05\x00\x00\x00\x03\x00\x00\x00\x00\x00\x01\x00%\x00\x00\x00\x14\x01\x0f\x00NUP\x00\x00\x00\x0e\x00\x00\x00\x00\x01\x00\x00\x00\x00nbjm\x00\x01\x00\x00\x00\x01\x00\x00\x00nbjmbjm\x05\x00\x00\x00ping\x00nbj\x01\x00\x00\x00\x01\x00\x00\x00\x0c\x00\x00\x00\x017i\x9b\x01\x00\x01\x05\t\x01\x01\x00\x00\x00\x00\x00\xff\xff\xff\xff' | nc 10.0.0.1 1556 | xxd
0000000: 0147 494f 5001 0201 0110 0000 0005 0000  .GIOP...........
0000010: 0000 0000 0000 0000 0000 0000 00         .............

It is possible to mitigate the weakness by firewalling tcp/1556. A possible mitigation has been published 8 months after the disclosure of the vulnerability. The mailinglist post contains the following remark:

The target date for patches that fix these issues is 29th September, 2017.

The vulnerability is also documented in the vulnerability database at Tenable (104888). Similar entries are available at 97354, 97355, 97356 and 97357.

Affected

Veritas NetBackup Appliance 6.x/7.x/8.0
Veritas NetBackup Appliances 2.x/3.0

Productinfo

Type

Backup Software

Vendor

Veritas

Name

NetBackup

Version

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.7
VulDB Meta Temp Score: 8.3

VulDB Base Score: 7.3
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Veritas): 9.0
Vendor Vector (Veritas): 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
ATT&CK: T1068

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Sven Blumenstein/Xiaoran Wang/Andrew Griffiths
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 104888
Nessus Name: Veritas NetBackup Appliance < 2.7.2 / 3.1.0 Multiple Vulnerabilities (VTS17-003)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Firewall
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Exploit Delay Time: 🔍

Firewalling: 🔍

Timelineinfo

11/29/2016 🔍
12/02/2016 +3 days 🔍
02/28/2017 +88 days 🔍
03/01/2017 +1 days 🔍
03/01/2017 +0 days 🔍
03/01/2017 +0 days 🔍
03/01/2017 +0 days 🔍
03/01/2017 +0 days 🔍
03/02/2017 +1 days 🔍
09/28/2017 +210 days 🔍
11/30/2017 +63 days 🔍
09/02/2020 +1007 days 🔍

Sourcesinfo

Advisory: Veritas NetBackup v6.x, v7.x, v8.0 and NetBackup appliances v2.x, v3.0 - Multiple Critical Vulnerabilities
Researcher: Sven Blumenstein, Xiaoran Wang, Andrew Griffiths
Organization: Google
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-6409 (🔍)
SecurityFocus: 96504 - Veritas NetBackup Server and Client/NetBackup Appliance Authentication Bypass Vulnerability
OSVDB: - CVE-2017-6409 - Veritas - NetBackup - Authentication Bypass Issue

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 03/01/2017 11:08
Updated: 09/02/2020 18:31
Changes: 03/01/2017 11:08 (99), 09/02/2020 18:31 (7)
Complete: 🔍

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