VDB-97361 · CVE-2017-6408 · BID 96491

Veritas NetBackup 6.x/7.x/8.0 pbx_exchange race condition

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.0$0-$5k0.00

A vulnerability was found in Veritas NetBackup 6.x/7.x/8.0 (Backup Software). It has been rated as problematic. This issue affects an unknown code block of the component pbx_exchange. The manipulation with an unknown input leads to a race condition vulnerability. Using CWE to declare the problem leads to CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. Impacted is 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. A local-privilege-escalation race condition in pbx_exchange can occur when a local user connects to a socket before permissions are secured.

The bug was discovered 03/01/2017. The weakness was released 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. The identification of this vulnerability is CVE-2017-6408 since 03/01/2017. An attack has to be approached locally. The requirement for exploitation is a simple authentication. Neither technical details nor an exploit are publicly available. 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.

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)).

Upgrading eliminates this vulnerability. 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). Entries connected to this vulnerability 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

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

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

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 4.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Veritas): 7.0
Vendor Vector (Veritas): 🔍

NVD Base Score: 7.0
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Race condition
CWE: CWE-362
CAPEC: 🔍
ATT&CK: 🔍

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

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 Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

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 🔍
03/02/2017 +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-2017-6408 (🔍)
SecurityFocus: 96491 - Veritas NetBackup Server and Client/ NetBackup Appliance Local Privilege Escalation Vulnerability
OSVDB: - CVE-2017-6408 - Veritas - NetBackup - Authentication Bypass Issue

See also: 🔍

Entryinfo

Created: 03/01/2017 11:08
Updated: 09/02/2020 18:23
Changes: 03/01/2017 11:08 (85), 09/02/2020 18:23 (14)
Complete: 🔍

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