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BMC BladeLogic Server Automation For Linux 8.7 Directory Dump

BMC BladeLogic Server Automation For Linux 8.7 Directory Dump
Posted Sep 4, 2016
Authored by Francois Goichon

BMC BladeLogic Server Automation versions 8.7 and below suffer from an unauthenticated arbitrary directory dumping vulnerability.

tags | advisory, arbitrary
advisories | CVE-2016-4322
MD5 | 174bb8caa2e2cdc2120f565953ce97ea

BMC BladeLogic Server Automation For Linux 8.7 Directory Dump

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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: FranASSois 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

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