Vulnerability identifier: #VU51422

Vulnerability risk: High

CVSSv3.1: 9.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2021-22991

CWE-ID: CWE-119

Exploitation vector: 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 execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing HTTP requests within the Traffic Management Microkernel (TMM) URI normalization feature. A remote attacker can create a specially crafted HTTP request to the virtual server associated with an HTTP profile, trigger memory corruption and crash the service or execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

BIG-IP: 16.0.0 - 16.0.1, 15.1.0 - 15.1.2, 14.1.0 - 14.1.3.1, 13.1.0 - 13.1.3.5, 12.1.0 - 12.1.5.2

BIG-IP LTM: 12.1.0 - 16.0.1

BIG-IP AAM: 12.1.0 - 16.0.1

BIG-IP Advanced WAF: 12.1.0 - 16.0.1

BIG-IP AFM: 12.1.0 - 16.0.1

BIG-IP Analytics: 12.1.0 - 16.0.1

BIG-IP APM: 12.1.0 - 16.0.1

BIG-IP ASM: 12.1.0 - 16.0.1

BIG-IP DDHD: 12.1.0 - 16.0.1

BIG-IP DNS: 12.1.0 - 16.0.1

BIG-IP FPS: 12.1.0 - 16.0.1

BIG-IP GTM: 12.1.0 - 16.0.1

BIG-IP Link Controller: 12.1.0 - 16.0.1

BIG-IP PEM: 12.1.0 - 16.0.1

BIG-IP SSLO: 12.1.0 - 16.0.1

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External links
http://support.f5.com/csp/article/K56715231

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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 Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.