Bomgar Remote Support Portal deserializes untrusted data

Overview

Bomgar Remote Support version 14.3.1 and possibly earlier versions deserialize untrusted data without sufficient validation, allowing an attacker to potentially execute arbitrary PHP code.

Description

CWE-502: Deserialization of Untrusted Data

Bomgar Remote Support version 14.3.1 and possibly earlier versions deserialize untrusted data without sufficient validation. An unauthenticated attacker can inject arbitrary input to at least one vulnerable PHP file, and authenticated attackers can inject arbitrary input to multiple vulnerable PHP files. When malicious data is deserialized, arbitrary PHP code may be executed in the context of the PHP server process.

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Impact

A remote, unauthenticated attacker may be able to execute arbitrary PHP code in the context of the Bomgar Remote Support portal application.

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Solution

Apply an Update

Bomgar advises system administrators to update their Bomgar Remote Support appliances to the latest version of Bomgar 15.1.1 or apply a patch that is available for download.

Additionally, please consider the following workaround:

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Restrict network access

Restrict access to Bomgar Support Portal to trusted hosts and networks until upgrading or applying the patch.

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Vendor Information

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Bomgar Affected

Notified: February 13, 2015 Updated: May 05, 2015

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

CVSS Metrics

Group	Score	Vector
Base	6.8	AV:N/AC:M/Au:N/C:P/I:P/A:P
Temporal	5.3	E:POC/RL:OF/RC:C
Environmental	1.3	CDP:ND/TD:L/CR:ND/IR:ND/AR:ND

References

• <http://www.bomgar.com/&gt;
• <https://help.bomgar.com/ssc/Download.aspx?id=2ada4ca5-8308-409d-852b-f1786b8f1d51&gt;

Acknowledgements

Thanks to Markus Wulftange for reporting this vulnerability.

This document was written by Todd Lewellen.

Other Information

CVE IDs:	CVE-2015-0935
Date Public:	2015-05-05 Date First Published: