F5 BIG-IP up to 12.1.1 Traffic Management Microkernel input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.1$0-$5k0.00

A vulnerability classified as problematic has been found in F5 BIG-IP up to 12.1.1 (Firewall Software). This affects some unknown processing of the component Traffic Management Microkernel. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on availability. The summary by CVE is:

An undisclosed traffic pattern received by a BIG-IP Virtual Server with TCP Fast Open enabled may cause the Traffic Management Microkernel (TMM) to restart, resulting in a Denial-of-Service (DoS).

The bug was discovered 01/26/2017. The weakness was shared 01/26/2017 as K71282001 (Website). It is possible to read the advisory at support.f5.com. This vulnerability is uniquely identified as CVE-2016-9249 since 11/09/2016. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The advisory points out:

If the Fast Open option is enabled in a TCP profile assigned to a BIG-IP virtual server, an attacker could cause the Traffic Management Microkernel (TMM) to restart, resulting in a denial-of-service (DoS).

The vulnerability scanner Nessus provides a plugin with the ID 96781 (F5 Networks BIG-IP : TMM vulnerability (K71282001)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family F5 Networks Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370462 (F5 BIG-IP ASM TMM Denial of Service Vulnerability (K71282001)).

Upgrading to version 11.2.1, 11.6.1 or 12.1.2 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (96781).

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CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
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CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Nessus ID: 96781
Nessus Name: F5 Networks BIG-IP : TMM vulnerability (K71282001)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 800325
OpenVAS Name: F5 BIG-IP - TMM vulnerability CVE-2016-9249
OpenVAS File: 🔍
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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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0-Day Time: 🔍
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Upgrade: BIG-IP 11.2.1/11.6.1/12.1.2

Timelineinfo

11/09/2016 🔍
01/26/2017 +78 days 🔍
01/26/2017 +0 days 🔍
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01/26/2017 +0 days 🔍
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01/26/2017 +0 days 🔍
01/27/2017 +1 days 🔍
01/27/2017 +0 days 🔍
01/31/2017 +3 days 🔍

Sourcesinfo

Vendor: f5.com

Advisory: K71282001
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-9249 (🔍)
SecurityTracker: 1037715
SecurityFocus: 95825 - Multiple F5 BIG-IP Products CVE-2016-9249 Denial of Service Vulnerability
OSVDB: - CVE-2016-9249 - BIG-IP Virtual Server - Denial of Service Issue

Entryinfo

Created: 01/27/2017 08:23
Changes: 01/27/2017 08:23 (85)
Complete: 🔍

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