F5 BIG-IP on 3900/6900/8900/8950/11000/11050 TMM TCP Packet access control

CVSS Meta Temp Score
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CTI Interest Score
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4.7$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in F5 BIG-IP on 3900/6900/8900/8950/11000/11050. The affected element is an unknown function of the component TMM. The manipulation as part of TCP Packet results in access control. This vulnerability is known as CVE-2017-6137. It is possible to launch the attack remotely. No exploit is available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability, which was classified as problematic, was found in F5 BIG-IP on 3900/6900/8900/8950/11000/11050 (Firewall Software) (affected version unknown). Affected is an unknown functionality of the component TMM. The manipulation as part of a TCP Packet leads to a access control vulnerability. CWE is classifying the issue as CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. This is going to have an impact on availability.

The bug was discovered 05/05/2017. The weakness was published 05/05/2017 as 635412 / K82851041 as confirmed knowledge base article (Website). The advisory is shared for download at support.f5.com. This vulnerability is traded as CVE-2017-6137 since 02/21/2017. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068. The advisory points out:

When software syncookie protection is activated for a virtual server (the database value connection.syncookies.threshold has been exceeded), and the unit also has the Traffic Management Microkernel (TMM) fast forward enabled (the database value tmm.ffwd.enable is true, the default), and TCP Segmentation Offload (TSO) is enabled (the database value tm.tcpsegmentationoffload is true, the default) a specific sequence of packets causes TMM to generate an egress packet with an invalid MSS. As a result, packets egressing the BIG-IP system with an invalid MSS may be dropped by a neighboring device. Additionally, on the 3900, 6900, 8900, 8950, 11000, and 11050 platforms this may cause the high-speed bridge (HSB) to lockup.

The vulnerability scanner Nessus provides a plugin with the ID 100006 (F5 Networks BIG-IP : TMM vulnerability (K82851041)), 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 370387 (F5 BIG-IP ASM Traffic Management Microkernel Denial of Service Vulnerability (K82851041)).

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (100006) and SecurityTracker (ID 1038409†). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 100006
Nessus Name: F5 Networks BIG-IP : TMM vulnerability (K82851041)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 800325
OpenVAS Name: F5 BIG-IP - TMM vulnerability CVE-2017-6137
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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Timelineinfo

02/21/2017 🔍
05/05/2017 +73 days 🔍
05/05/2017 +0 days 🔍
05/05/2017 +0 days 🔍
05/06/2017 +1 days 🔍
05/06/2017 +0 days 🔍
05/08/2017 +2 days 🔍
05/09/2017 +1 days 🔍
08/25/2024 +2665 days 🔍

Sourcesinfo

Vendor: f5.com

Advisory: 635412 / K82851041
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-6137 (🔍)
GCVE (CVE): GCVE-0-2017-6137
GCVE (VulDB): GCVE-100-100920
OSVDB: - CVE-2017-6137 - F5 - Big-Ip Access Policy Manager - Medium
SecurityTracker: 1038409

Entryinfo

Created: 05/06/2017 19:58
Updated: 08/25/2024 13:05
Changes: 05/06/2017 19:58 (75), 09/24/2020 12:01 (4), 12/22/2020 14:05 (3), 08/25/2024 13:05 (17)
Complete: 🔍
Cache ID: 216::103

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