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[R3] Nessus 6.10.2 Fixes One Vulnerability

Medium
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Synopsis

Nessus was found to contain a flaw that allowed a remote, authenticated attacker to upload a crafted file that could be written to anywhere on the system. This could be used to subsequently gain elevated privileges on the system (e.g. after a reboot). This issue only affects installations on Windows. Note that our CVSSv2 score follows specifications regarding the immediate impact (writing a custom file anywhere on the system), and does not reflect the follow-up impact which would require additional actions by the administrator.

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

Solution

Tenable has released Nessus version 6.10.2 that corresponds to the supported operating systems and architectures. To update your Nessus installation, follow these steps:

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_nessus.html#6102

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

CVE ID: CVE-2017-6543
Tenable Advisory ID: TNS-2017-06
Risk Factor: Medium
Credit:
Anonymous (Individual, not the Hacktivist Group)
CVSSv2 Base / Temporal Score
6.8 / 5.6
CVSSv2 Vector:
(AV:N/AC:L/Au:S/C:N/I:C/A:N/E:F/RL:OF/RC:C)

Affected Products

Nessus: 6.8.0, 6.8.1, 6.9.0, 6.9.2, 6.9.2, 6.9.3, 6.10.0, 6.10.1
Tenable Appliance: 4.4.0

Disclosure Timeline

2017-02-14 - Issue reported to Tenable
2017-02-14 - Tenable confirms receipt, and verifies issue
2017-02-21 - Nessus 6.10.2 released
2017-03-08 - CVE ID Requested (ID 303774, MCID802087)
2017-03-08 - CVE ID Assigned & Published

Advisory Timeline

2017-02-21 - [R1] Initial Release
2017-02-28 - [R2] Adjust CVSS for worst-case scenario (AV:A -> AV:N)
2017-03-07 - [R3] Added Tenable Appliance info
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