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Solarwinds Virtualization Manager 6.3.1 Weak Crypto

Solarwinds Virtualization Manager 6.3.1 Weak Crypto
Posted Jun 17, 2016
Authored by Nate Kettlewell

Solarwinds Virtualization Manager versions 6.3.1 and below use weak cryptography in /etc/shadow.

tags | advisory
advisories | CVE-2016-5709
SHA-256 | a117ac64d0e6467644e089addb1236c0f9a9beae0263d71706ae7d3b857fa245

Solarwinds Virtualization Manager 6.3.1 Weak Crypto

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Product: Solarwinds Virtualization Manager

Vendor: Solarwinds
Vulnerable Version(s): < 6.3.1
Tested Version: 6.3.1

Vendor Notification: April 25th, 2016
Vendor Patch Availability to Customers: June 1st, 2016
Public Disclosure: June 14th, 2016

Vulnerability Type: Security Misconfiguration
CVE Reference: CVE-2016-5709
Risk Level: High
CVSSv3 Base Score: 6.0 (CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N)
Solution Status: Solution Available

Discovered and Provided: Nate Kettlewell, Depth Security ( https://www.depthsecurity.com/ )

-----------------------------------------------------------------------------------------------

Advisory Details:

Depth Security discovered a vulnerability in Solarwinds Virtualization Manager appliance.
This attack requires a user to have an operating system shell with superuser privilges on the vulnerable appliance.

1) Use of a weak encryption algorithm in Solarwinds Virtualization Manager: CVE-2016-5709

The vulnerability exists due to the use of a weak encryption algorithm in the /etc/shadow file.
A local attacker in possession of a superuser operating system shell can easily crack the passwords of other system users.

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Solution:

Solarwinds has released a hotfix to remediate this vulnerability on existing installations.

This flaw as well as several others have been corrected and that release has been put into manufacturing for new appliances.

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Proof of Concept:

An attacker can dump the contents of the /etc/shadow file using the following command:

cat /etc/passwd

The output of this command can then be used with many popular password cracking programs to obtain the cleartext passwords of other operating system users.

-----------------------------------------------------------------------------------------------

References:

[1] Solarwinds Virtualization Manager- http://www.solarwinds.com/virtualization-manager - Solarwinds Virtualization Manager provides monitoring and remediation for virtualized environments.


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