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[R4] SecurityCenter 5.0.2 Fixes Third-party Library

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Synopsis

Tenable SecurityCenter is potentially impacted by two vulnerabilities in Apache HTTP Server.

CVE-2015-3183: The chunked transfer coding implementation in the Apache HTTP Server before 2.4.14 does not properly parse chunk headers, which allows remote attackers to conduct HTTP request smuggling attacks via a crafted request, related to mishandling of large chunk-size values and invalid chunk-extension characters in modules/http/http_filters.c.

CVE-2015-3185: The ap_some_auth_required function in server/request.c in the Apache HTTP Server 2.4.x before 2.4.14 does not consider that a Require directive may be associated with an authorization setting rather than an authentication setting, which allows remote attackers to bypass intended access restrictions in opportunistic circumstances by leveraging the presence of a module that relies on the 2.2 API behavior.

The 4.x line of SecurityCenter is potentially impacted by only CVE-2015-3183, and the 5.x line is potentially impacted by both CVE-2015-3183 and CVE-2015-3185.

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

Solution

Tenable has updated the products to address this issue. Please see the product-specific instructions below:

SecurityCenter:

Tenable has released a patch for versions 4.7.1 and 4.8.2 of SecurityCenter, and version 5.0.2 that addresses these vulnerabilities. Upgrade information can be obtained from:

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

The patch can be obtained from:

https://support.tenable.com/support-center/index.php?x=&mod_id=160

File	   		      md5sum
SC-201508.1-4.x-rh5-32.tgz    66b1ff8e795c40f5722375d032651c23  
SC-201508.1-4.x-rh5-64.tgz    a141d53e9b49fb2848184f3b3f5edb25  
SC-201508.1-4.x-rh6-32.tgz    103ed541fd1992e04586a22e6fd4a0b4
SC-201508.1-4.x-rh6-64.tgz    44dfa1c38921d3626d752dffa30d195f

Additional References

http://www.apache.org/dist/httpd/Announcement2.4.html

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-2015-11
Risk Factor: Medium
CVSSv2 Base / Temporal Score
5.0 / 3.7
CVSSv2 Vector:
(AV:N/AC:L/Au:N/C:N/I:P/A:N/E:U/RL:OF/RC:C)
Additional Keywords:
IAVM 2015-A-0174

Affected Products

SecurityCenter: 4.6.2.2, 4.7.0, 4.7.1, 4.8.0, 4.8.1, 4.8.2, 5.0.0.1, 5.0.1

Disclosure Timeline

2015-07-10 - Apache 2.4.16 Released
2015-08-20 - Tenable SecurityCenter Solution Available

Advisory Timeline

2015-08-20 - [R1] Initial release
2015-08-21 - [R2] SC 5.0.2 information added
2016-11-15 - [R3] Adjusted CVSSv2 scoring
2017-02-28 - [R4] Adjust CVSS for worst-case scenario (AV:A -> AV:N)
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