#VU56088 Input validation error in F5 Networks products - CVE-2021-23045

Vulnerability identifier: #VU56088

Vulnerability risk: Low

CVSSv4.0: 2.3 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-23045

CWE-ID: CWE-20

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
BIG-IP
Hardware solutions / Firmware
BIG-IP DDHD
Hardware solutions / Firmware
BIG-IP SSLO
Hardware solutions / Firmware
BIG-IP LTM
Hardware solutions / Security hardware applicances
BIG-IP AFM
Hardware solutions / Security hardware applicances
BIG-IP Analytics
Hardware solutions / Security hardware applicances
BIG-IP APM
Hardware solutions / Security hardware applicances
BIG-IP ASM
Hardware solutions / Security hardware applicances
BIG-IP FPS
Hardware solutions / Security hardware applicances
BIG-IP GTM
Hardware solutions / Security hardware applicances
BIG-IP PEM
Hardware solutions / Security hardware applicances
BIG-IP AAM
Hardware solutions / Routers & switches, VoIP, GSM, etc
BIG-IP DNS
Hardware solutions / Routers & switches, VoIP, GSM, etc
BIG-IP Link Controller
Hardware solutions / Routers & switches, VoIP, GSM, etc
BIG-IP Advanced WAF
Client/Desktop applications / Antivirus software/Personal firewalls

Vendor: F5 Networks

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in the Traffic Management Microkernel (TMM). A remote attacker on the local network can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

BIG-IP: 12.1.0 HF1 - 12.1.6, 13.1.0 - 13.1.4, 14.0.0 - 14.0.1.1, 14.1.0 - 14.1.4.3, 15.0.0 - 15.0.1.4, 15.1.0 - 15.1.3.1, 16.0.0 - 16.0.1.2, 16.1.0

BIG-IP LTM: 12.1.0 HF1 - 16.0.1.2

BIG-IP AAM: 12.1.0 HF1 - 16.0.1.2

BIG-IP Advanced WAF: 12.1.0 - 16.0.1.2

BIG-IP AFM: 12.1.0 HF1 - 16.0.1.2

BIG-IP Analytics: 12.1.0 - 16.0.1.2

BIG-IP APM: 12.1.0 HF1 - 16.0.1.2

BIG-IP ASM: 12.1.0 HF1 - 16.0.1.2

BIG-IP DDHD: 12.1.0 - 16.0.1.2

BIG-IP DNS: 12.1.0 - 16.0.1.2

BIG-IP FPS: 12.1.0 - 16.0.1.2

BIG-IP GTM: 12.1.0 - 16.0.1.2

BIG-IP Link Controller: 12.1.0 HF1 - 16.0.1.2

BIG-IP PEM: 12.1.0 HF1 - 16.0.1.2

BIG-IP SSLO: 12.1.0 - 16.0.1.2

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External links
https://support.f5.com/csp/article/K94941221

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.