9.8
Critical
Exploited
CVE-2021-22991 F5 BIG-IP Traffic Management Microkernel Buffer Overflow
Active exploitation observed
· CISA KEV catalogue
Required action
Apply updates per vendor instructions.
Ransomware campaigns
Not observed so far
Weakness
CWE-119
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| BIG-IP | Versions not published |
References
- support.f5.com support.f5.com
Timeline
- Published
- Added to the KEV catalogue
- Last modified
Other CVEs of BIG-IP
The 110 CVEs of BIG-IP →
CVE-2022-23029
On BIG-IP version 16.x before 16.1.0, 15.1.x before 15.1.4.1, 14.1.x before 14.1.4.4, and all versions of 13.1.x,…
Not rated
CVE-2022-23030
On version 16.1.x before 16.1.2, 15.1.x before 15.1.4.1, 14.1.x before 14.1.4.5, and all versions of 13.1.x, when the…
Not rated
CVE-2022-23027
On BIG-IP versions 15.1.x before 15.1.4, 14.1.x before 14.1.4.4, 13.1.x beginning in 13.1.3.6, 12.1.5.3-12.1.6, and…
Not rated
CVE-2022-23021
On BIG-IP version 16.1.x before 16.1.2, when any of the following configurations are configured on a virtual server,…
Not rated