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Unauthenticated Arbitrary Directory Dump in BMC BladeLogic Server Automation



Title:                                      Unauthenticated Arbitrary Directory Dump in BMC BladeLogic Server Automation

Affected Software:         BMC BladeLogic Server Automation for Linux <= 8.7

CVSSv2 Base Score:         7.8 (AV:N/AC:L/Au:N/C:C/I:N/A:N)

Reference:                         CVE-2016-4322

Author:                                François Goichon of Context Information Security

 

1. Product Information

===========================

BMC BladeLogic Server Automation (BSA) is an enterprise management solution, which allows its customers to quickly and securely provision, configure, patch, and maintain physical, virtual, and cloud servers.

It is available for Linux and Windows and runs as a privileged network daemon on the supervised servers.

For more information, please refer to http://www.bmcsoftware.com.au/it-solutions/bladelogic-server-automation.html

 

2. Vulnerability Summary

===========================

A logic flaw in the authentication process of BSA's network daemon (rscd) could allow a remote attacker to execute several commands without providing a valid client certificate or valid credentials.

Amongst the affected commands, the REMOTE_COPY_DIRECTORY feature performs a recursive dump of an arbitrary directory, with the daemon's privileges (root).

This could allow an attacker to retrieve any file from the remote system, e.g. /etc/shadow.

 

3. Remediation Steps

===========================

It is recommended to upgrade your BSA <= 8.7 for Linux installation by performing one of the following:

- Apply BSA 8.7 Patch 3

- Upgrade to BSA >= 8.8

These downloads are available on BMC's Electronic Product Distribution website at http://www.bmc.com/available/epd.html

 

4. Disclosure Timeline

===========================

02/04/2016: Vendor notified

05/04/2016: Vulnerability confirmed

06/05/2016: Fix available for BSA 8.7

14/06/2016: BSA 8.8, containing a fix for CVE-2016-4322, is released

05/09/2016: Coordinated public disclosure

 

Security Research - Context Information Security

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<html><head><meta charset="windows-1252"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">Title:               Unauthenticated Arbitrary Directory Dump in BMC BladeLogic Server Automation
Affected Software:   BMC BladeLogic Server Automation for Linux &lt;= 8.7
CVSSv2 Base Score:   7.8 (AV:N/AC:L/Au:N/C:C/I:N/A:N)
Reference:           CVE-2016-4322
Author:              François Goichon of Context Information Security

1. Product Information
===========================
BMC BladeLogic Server Automation (BSA) is an enterprise management solution, which allows its customers to quickly and securely provision, configure, patch, and maintain physical, virtual, and cloud servers. 
It is available for Linux and Windows and runs as a privileged network daemon on the supervised servers.
For more information, please refer to http://www.bmcsoftware.com.au/it-solutions/bladelogic-server-automation.html

2. Vulnerability Summary
===========================
A logic flaw in the authentication process of BSA's network daemon (rscd) could allow a remote attacker to execute several commands without providing a valid client certificate or valid credentials. 
Amongst the affected commands, the REMOTE_COPY_DIRECTORY feature performs a recursive dump of an arbitrary directory, with the daemon's privileges (root).
This could allow an attacker to retrieve any file from the remote system, e.g. /etc/shadow.

3. Remediation Steps
===========================
It is recommended to upgrade your BSA &lt;= 8.7 for Linux installation by performing one of the following:
 - Apply BSA 8.7 Patch 3
 - Upgrade to BSA &gt;= 8.8
These downloads are available on BMC's Electronic Product Distribution website at http://www.bmc.com/available/epd.html

4. Disclosure Timeline
===========================
02/04/2016: Vendor notified
05/04/2016: Vulnerability confirmed
06/05/2016: Fix available for BSA 8.7
14/06/2016: BSA 8.8, containing a fix for CVE-2016-4322, is released
05/09/2016: Coordinated public disclosure

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