F5 BIG-IP up to 12.1.1 Traffic Management Microkernel Fragmented Packet double free

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4.7$0-$5k0.00

A vulnerability classified as problematic has been found in F5 BIG-IP up to 12.1.1 (Firewall Software). Affected is an unknown part of the component Traffic Management Microkernel. The manipulation as part of a Fragmented Packet leads to a double free vulnerability. CWE is classifying the issue as CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. This is going to have an impact on availability. CVE summarizes:

In BIG-IP LTM, AAM, AFM, Analytics, APM, ASM, DNS, Link Controller, PEM, and WebSafe software 12.0.0 to 12.1.1, in some cases the Traffic Management Microkernel (TMM) may crash when processing fragmented packets. This vulnerability affects TMM through a virtual server configured with a FastL4 profile. Traffic processing is disrupted while TMM restarts. If the affected BIG-IP system is configured as part of a device group, it will trigger a failover to the peer device.

The bug was discovered 11/06/2017. The weakness was shared 11/22/2017 (Website). The advisory is available at support.f5.com. This vulnerability is traded as CVE-2017-6166 since 02/21/2017. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 104415 (F5 Networks BIG-IP : BIG-IP FastL4 TMM vulnerability (K65615624)), 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 370667 (F5 BIG-IP ASM TMM FastL4 Profile Denial of Service Vulnerability (K65615624)).

Upgrading eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (104415), SecurityFocus (BID 102264†) and SecurityTracker (ID 1039949†). The entries VDB-241660, VDB-253857, VDB-253858 and VDB-253860 are related to this item.

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CPE 2.3info

CPE 2.2info

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CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.7

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
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NVD Base Score: 5.9
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CVSSv2info

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Exploitinginfo

Class: Double free
CWE: CWE-415 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Nessus ID: 104415
Nessus Name: F5 Networks BIG-IP : BIG-IP FastL4 TMM vulnerability (K65615624)
Nessus File: 🔍
Nessus Risk: 🔍
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Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

02/21/2017 🔍
11/06/2017 +258 days 🔍
11/06/2017 +0 days 🔍
11/07/2017 +1 days 🔍
11/22/2017 +15 days 🔍
11/22/2017 +0 days 🔍
11/23/2017 +1 days 🔍
12/01/2017 +8 days 🔍
12/22/2017 +21 days 🔍
01/11/2023 +1846 days 🔍

Sourcesinfo

Vendor: f5.com

Advisory: K65615624
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-6166 (🔍)
SecurityFocus: 102264 - Multiple F5 BIG-IP Products CVE-2017-6166 Remote Denial of Service Vulnerability
SecurityTracker: 1039949

See also: 🔍

Entryinfo

Created: 11/23/2017 07:53 AM
Updated: 01/11/2023 02:09 PM
Changes: 11/23/2017 07:53 AM (70), 12/12/2019 08:32 AM (9), 01/11/2023 02:09 PM (4)
Complete: 🔍
Cache ID: 3:03C:40

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