QID 375901

Date Published: 2021-09-30

QID 375901: F5 BIG-IP Application Security Manager (ASM), Local Traffic Manager (LTM), Access Policy Manager (APM) Traffic Management Microkernel (TMM) Vulnerability (K70415522)

F5 BIG-IP ASM (Application Security Manager) is a flexible web application firewall that secures web applications in traditional, virtual, and private cloud environments.
F5 BIG-IP (LTM) Local Traffic Manager is the most popular module offered on F5 Networks BIG-IP platform. The real power of the LTM is it is a Full Proxy, allowing you to augment client and server side connections. All while making informed load balancing decisions on availability, performance, and persistence.
F5 BIG-IP Access Policy Manager (APM) is a secure, flexible, high-performance solution that provides unified global access to your network, cloud, and applications.

When an HTTP profile is configured on a virtual server, after a specific sequence of packets, chunked responses can cause the Traffic Management Microkernel (TMM) to terminate. (CVE-2021-23035)

Vulnerable Component: BIG-IP ASM, APM, LTM

Affected Versions:
14.1.0 - 14.1.4.3

QID Detection Logic(Authenticated):
This QID checks for the vulnerable versions of F5 BIG-IP devices using the tmsh command.

Traffic is disrupted while the TMM process restarts. This vulnerability allows a remote attacker to cause a denial-of-service (DoS) on the BIG-IP system. There is no control plane exposure; this is a data plane issue only.

CVSS V3 rated as High - 7.5 severity.

CVSS V2 rated as High - 7.1 severity.

Solution

The vendor has released patch, for more information please visit: K70415522

Vendor References

K70415522 - support.f5.com/csp/article/K70415522

CVEs related to QID 375901

CVE-2021-23035 |

Software Advisories

Advisory ID	Software	Component	Link
K70415522			support.f5.com/csp/article/K70415522

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Array ( [qid] => 375901 [title] => F5 BIG-IP Application Security Manager (ASM), Local Traffic Manager (LTM), Access Policy Manager (APM) Traffic Management Microkernel (TMM) Vulnerability (K70415522) [severity] => 3 [description] => F5 BIG-IP ASM (Application Security Manager) is a flexible web application firewall that secures web applications in traditional, virtual, and private cloud environments.
F5 BIG-IP (LTM) Local Traffic Manager is the most popular module offered on F5 Networks BIG-IP platform. The real power of the LTM is it is a Full Proxy, allowing you to augment client and server side connections. All while making informed load balancing decisions on availability, performance, and persistence.
F5 BIG-IP Access Policy Manager (APM) is a secure, flexible, high-performance solution that provides unified global access to your network, cloud, and applications.

When an HTTP profile is configured on a virtual server, after a specific sequence of packets, chunked responses can cause the Traffic Management Microkernel (TMM) to terminate. (CVE-2021-23035)

Vulnerable Component: BIG-IP ASM, APM, LTM

Affected Versions:
14.1.0 - 14.1.4.3

QID Detection Logic(Authenticated):
This QID checks for the vulnerable versions of F5 BIG-IP devices using the tmsh command.

[solution] => The vendor has released patch, for more information please visit: K70415522 [consequence] => Traffic is disrupted while the TMM process restarts. This vulnerability allows a remote attacker to cause a denial-of-service (DoS) on the BIG-IP system. There is no control plane exposure; this is a data plane issue only.

[published] => Yes [date_insert] => 2021-09-29 [date_published] => 2021-09-30 [cve] => Array ( [0] => CVE-2021-23035 ) [vendor_refs] => Array ( [0] => Array ( [vendor_ref] => K70415522 [vendor_ref_url] => https://support.f5.com/csp/article/K70415522 ) ) [cvss_v2] => Array ( [basescore] => 7.1 [temporalscore] => 5.3 ) [cvss_v3] => Array ( [basescore] => 7.5 [temporalscore] => 6.5 ) [patches] => Array ( [0] => Array ( [link] => https://support.f5.com/csp/article/K70415522 [advisory_id] => K70415522 [os_sw] => [component] => ) ) )