Commvault Edge Server deserializes cookie data insecurely

Overview

Commvault Edge Server, version 10 R2, deserializes untrusted, user-provided cookie data, resulting in arbitrary OS command execution with the web server’s privileges.

Description

CWE-502: Deserialization of Untrusted Data - CVE-2015-7253

Commvault Edge Server, version 10 R2, deserializes user-provided cookie data without properly validating it first. An unauthenticated attacker with access to the CommVault Edge Server Web Console can provide specially crafted cookie data that, when deserialized, results in the execution of arbitrary OS commands with the web server’s privileges.

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Impact

A remote, unauthenticated attacker can provide specially crafted cookie data that, when deserialized, will execute arbitrary OS commands with the privileges of the web server.

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Solution

Apply an update

The vendor has issued updates to address this vulnerability. Users are encouraged to update to the latest release, but those unable or unwilling to do so should consider the following workaround.

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Restrict access

As a general good security practice, only allow connections from trusted hosts and networks.

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Vendor Information

866432

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Commvault Affected

Notified: September 17, 2015 Updated: November 03, 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	10	AV:N/AC:L/Au:N/C:C/I:C/A:C
Temporal	8.5	E:POC/RL:U/RC:UR
Environmental	2.1	CDP:ND/TD:L/CR:ND/IR:ND/AR:ND

References

• <http://www.commvault.com/&gt;
• <https://cwe.mitre.org/data/definitions/502.html&gt;
• <http://docs.commvault.com/commvault/v10/article?p=announcement/announcements.htm#Security&gt;

Acknowledgements

Thanks to Markus Wulftange and Matthias Kaiser of Code White for reporting this vulnerability.

This document was written by Joel Land.

Other Information

CVE IDs:	CVE-2015-7253
Date Public:	2015-11-03 Date First Published: