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[R2] HP LoadRunner mchan.dll Shared Memory Object Name Construction Remote Stack Buffer Overflow



The LoadRunner agent listening on TCP port 54345 suffers from a remote stack buffer overflow. The issue occurs when processing crafted packets with "-server_type=2" and an overly long "-server_name=AAAAA..." connection request. The agent passes the request to the mchan.dll library which constructs the name of a shared memory object in a stack buffer that is only 256 bytes. This may lead to remote code execution.


HP has released an upgrade for LoadRunner (version 12.53) to correct this issue. Please consult the vendor advisory for details.

Disclosure Timeline

2015-09-29 - Email ZDI gauging interest in LoadRunner
2015-09-29 - ZDI says 1 of 4 issues are of interest
2015-09-30 - Submitted remote overflow to ZDI, case ID bmartin001
2015-10-22 - ZDI offers $1,000 for remote overflow
2015-11-24 - Tenable asks if money can be donated directly to charity on our behalf
2015-11-24 - ZDI is keen to idea, will inquire with the powers that be
2016-01-12 - Transitioning pay systems, can't do right now, will do in future.
2016-01-12 - Tenable opts for cold, hard cash
2016-05-18 - HP says plan is to release fix by end of May.
2016-05-31 - Vendor releases fix and advisory
2016-06-03 - ZDI publishes ZDI-16-363

All information within TRA advisories is provided “as is”, without warranty of any kind, including the implied warranties of merchantability and fitness for a particular purpose, and with no guarantee of completeness, accuracy, or timeliness. Individuals and organizations are responsible for assessing the impact of any actual or potential security vulnerability.

Tenable takes product security very seriously. If you believe you have found a vulnerability in one of our products, we ask that you please work with us to quickly resolve it in order to protect customers. Tenable believes in responding quickly to such reports, maintaining communication with researchers, and providing a solution in short order.

For more details on submitting vulnerability information, please see our Vulnerability Reporting Guidelines page.

If you have questions or corrections about this advisory, please email [email protected]

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