F5 BIG-IP up to 11.5.4/11.6.1/12.1.1 Traffic Management Microkernel memory corruption

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.7	$0-$5k	0.00

A vulnerability was found in F5 BIG-IP up to 11.5.4/11.6.1/12.1.1 (Firewall Software). It has been rated as problematic. This issue affects some unknown processing of the component Traffic Management Microkernel. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is availability. The summary by CVE is:

In F5 BIG-IP LTM, AAM, AFM, APM, ASM, Link Controller, PEM, PSM software version 12.0.0 to 12.1.2, 11.6.0 to 11.6.1, 11.4.0 to 11.5.4, when a virtual server uses the standard configuration of HTTP/2 or SPDY profile with Client SSL profile, and the client initiates a number of concurrent streams beyond the advertised limit can cause a disruption of service. Remote client initiating stream beyond the advertised limit can cause a disruption of service. The Traffic Management Microkernel (TMM) data plane is exposed to this issue; the control plane is not exposed.

The bug was discovered 10/26/2017. The weakness was disclosed 10/27/2017 (Website). The advisory is shared at support.f5.com. The identification of this vulnerability is CVE-2017-6163 since 02/21/2017. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 104191 (F5 Networks BIG-IP : BIG-IP virtual servers with Client SSL and HTTP/2 or SPDY configured vulnerability (K22541983)), 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 370640 (F5 BIG-IP Traffic Management Microkernel Denial of Service Vulnerability (K22541983)).

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 vulnerability database at Tenable (104191). The entries 108736, 108735, 108734 and 108733 are pretty similar.

Productinfo

Type

Firewall Software

Vendor

Name

BIG-IP

Version

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
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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
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
NVD Vector: 🔍

CVSSv2info

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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

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Nessus ID: 104191
Nessus Name: F5 Networks BIG-IP : BIG-IP virtual servers with Client SSL and HTTP/2 or SPDY configured vulnerability (K22541983)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

02/21/2017 🔍
10/26/2017 +246 days 🔍
10/26/2017 +0 days 🔍
10/26/2017 +0 days 🔍
10/27/2017 +1 days 🔍
10/27/2017 +0 days 🔍
10/27/2017 +0 days 🔍
10/28/2017 +1 days 🔍
01/05/2023 +1895 days 🔍

Sourcesinfo

Vendor: f5.com

Advisory: K22541983
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-6163 (🔍)
SecurityTracker: 1039671
SecurityFocus: 101606

See also: 🔍

Entryinfo

Created: 10/28/2017 10:36
Updated: 01/05/2023 09:31
Changes: 10/28/2017 10:36 (67), 12/01/2019 15:58 (4), 01/21/2021 07:56 (3), 01/21/2021 07:59 (2), 01/05/2023 09:31 (3)
Complete: 🔍