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[R4] SecurityCenter 5.4.4 Fixes File Upload unserialize() Function PHP Object Handling Remote File Deletion

Medium
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Synopsis

SecurityCenter was found to use the PHP unserialize() function in several places in such a way that may allow a remote authenticated attacker to upload a crafted PHP object that resulted in the deletion of arbitrary files.

Please note that Tenable strongly recommends that SecurityCenter be installed on a subnet that is not Internet addressable.

Solution

Tenable has released SecurityCenter 5.4.4 to address these issues. The new version can be obtained from the Tenable Support Portal (https://support.tenable.com/support-center/index.php?x=&mod_id=160).

Additionally, patches have been created to address these issues for Security Center 5.4.0 through 5.4.3. The patches and associated checksums can be found at http://static.tenable.com/prod_docs/upgrade_security_center.html.

Tenable has released version 4.5.0 of the Appliance that resolves this issue. Users are strongly encouraged to use the online updating functionality or download the new version to upgrade.

Additional References

http://static.tenable.com/prod_docs/upgrade_security_center.html#544

This page contains information regarding security vulnerabilities that may impact Tenable's products. This may include issues specific to our software, or due to the use of third-party libraries within our software. Tenable strongly encourages users to ensure that they upgrade or apply relevant patches in a timely manner.

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]

Risk Information

Tenable Advisory ID: TNS-2017-05
Risk Factor: Medium
Credit:
Gregor Kopf [<a href="http://www.recurity-labs.com/" target="_blank">Recurity Labs GmbH</a>]
CVSSv2 Base / Temporal Score
4.0 / 3.3
CVSSv2 Vector:
(AV:N/AC:L/Au:S/C:N/I:P/A:N/E:F/RL:OF/RC:C)

Affected Products

SecurityCenter: 5.4.0, 5.4.1, 5.4.2, 5.4.3
Tenable Appliance: 4.4.0

Disclosure Timeline

2017-02-10 - Issue reported to Tenable via Support
2017-02-10 - Tenable confirms receipt of report
2017-02-17 - Patch released to address issue
2017-03-01 - SecurityCenter 5.4.4 released

Advisory Timeline

2017-02-17 - [R1] Initial Release
2017-02-28 - [R2] Adjust CVSS for worst-case scenario (AV:A -> AV:N)
2017-03-03 - [R3] Add SC upgrade information
2017-03-07 - [R4] Added Tenable Appliance info
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