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[R3] Nessus 6.10.5 Fixes Two Vulnerabilities

High
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Synopsis

Nessus was found to be vulnerable to a local privilege escalation issue and a local denial of service condition due to insecure permissions when running in Agent Mode. This may allow an attacker to gain administrative privileges on the system hosting a Nessus agent. Note that these are very similar to, but different than the Agent issue fixed in version 6.10.4.

  • A local privilege escalation exists due to insecure permissions. CVSSv2 7.2 / 5.6 (AV:L/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:OF/RC:C). Tracked internally as NES-6137, CVE-2017-7850.
  • A local denial of service condition exists due to insecure permissions that would stop the agent from conducting scans. CVSSv2 2.1 / 1.7 (AV:L/AC:L/Au:N/C:N/I:N/A:P/E:F/RL:OF/RC:C). CVE-2017-7849

Solution

Tenable has released Nessus version 6.10.5 that corresponds to the supported operating systems and architectures. To update your Nessus installation, follow these steps:

Note that only agents are impacted by the local privilege escalation issue, not scanners. If Nessus Manager is updated then auto updates will be deployed to the agents as well. If the agent is on Tenable.io then all of the agents will receive the updates.

Additional References

http://static.tenable.com/prod_docs/upgrade_nessus.html#6105

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-2017-10
Risk Factor: High
Credit:
Jakub Palaczynski
CVSSv2 Base / Temporal Score
7.2 / 5.6
CVSSv2 Vector:
(AV:L/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:OF/RC:C)

Affected Products

Nessus: 6.10.0, 6.10.1, 6.10.2, 6.10.3, 6.10.4

Disclosure Timeline

2017-04-05 - Issue reported to Tenable by Jakub Palaczynski
2017-04-05 - Tenable confirms receipt and verifies issues
2017-04-11 - Nessus 6.10.5 released
2017-04-12 - Requested CVE IDs
2017-04-13 - CVE IDs assigned

Advisory Timeline

2017-04-11 - [R1] Initial Release
2017-04-12 - [R2] Fixed solution, mistakenly said 10.6.4 was fix
2017-04-13 - [R3] Added CVE IDs
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