Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU51490
Risk: Medium
CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-23000
CWE-ID:
CWE-399 - Resource Management Errors
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper management of internal resources within the application, if the tmm.http.rfc.enforcement with invalid host detection is enabled. A remote attacker can send a specific sequence of malicious requests and perform a denial of service (DoS) attack.
MitigationInstall updates from vendor's website.
Vulnerable software versionsBIG-IP: 12.1.5.2 - 13.1.3.6
BIG-IP LTM: 12.1.5.2 - 13.1.3.6
BIG-IP AAM: 12.1.5.2 - 13.1.3.6
BIG-IP Advanced WAF: 12.1.5.2 - 13.1.3.6
BIG-IP AFM: 12.1.5.2 - 13.1.3.6
BIG-IP Analytics: 12.1.5.2 - 13.1.3.6
BIG-IP APM: 12.1.5.2 - 13.1.3.6
BIG-IP ASM: 12.1.5.2 - 13.1.3.6
BIG-IP DDHD: 12.1.5.2 - 13.1.3.6
BIG-IP DNS: 12.1.5.2 - 13.1.3.6
BIG-IP FPS: 12.1.5.2 - 13.1.3.6
BIG-IP GTM: 12.1.5.2 - 13.1.3.6
BIG-IP Link Controller: 12.1.5.2 - 13.1.3.6
BIG-IP PEM: 12.1.5.2 - 13.1.3.6
BIG-IP SSLO: 12.1.5.2 - 13.1.3.6
External linkshttp://support.f5.com/csp/article/K34441555
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?
No. We are not aware of malware exploiting this vulnerability.