CVE-2021-22991 Information

Description

On BIG-IP versions 16.0.x before 16.0.1.1 15.1.x before 15.1.2.1 14.1.x before 14.1.4 13.1.x before 13.1.3.6 and 12.1.x before 12.1.5.3 undisclosed requests to a virtual server may be incorrectly handled by the Traffic Management Microkernel (TMM) URI normalization which may trigger a buffer overflow resulting in a DoS attack. In certain situations it may theoretically allow bypass of URL based access control or remote code execution (RCE). Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

https://support.f5.com/csp/article/K56715231

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8