Denial of srevice in HTTP/2 implementation in F5 BIG-IP
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-22999 |
| CWE-ID | CWE-399 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
BIG-IP 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 |
| Vendor | F5 Networks |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Resource management error
EUVDB-ID: #VU51394
Risk: Medium
CVSSv4.0: [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2021-22999
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 HTTP/2 Profile feature when processing aborted connections for HTTP/2 requests. A remote attacker can send multiple HTTP/2 requests and permanently close connections, which leads to a denial of service (DoS) condition, as the BIG-IP system indefinitely retains such streams unclosed.
MitigationInstall updates from vendor's website.
Vulnerable software versionsBIG-IP: 14.1.0 - 15.0.1.4
BIG-IP LTM: 14.1.0 - 15.0.1.4
BIG-IP AAM: 14.1.0 - 15.0.1.4
BIG-IP AFM: 14.1.0 - 15.0.1.4
BIG-IP Analytics: 14.1.0 - 15.0.1.4
BIG-IP APM: 14.1.0 - 15.0.1.4
BIG-IP ASM: 14.1.0 - 15.0.1.4
BIG-IP DNS: 14.1.0 - 15.0.1.4
BIG-IP FPS: 14.1.0 - 15.0.1.4
BIG-IP GTM: 14.1.0 - 15.0.1.4
BIG-IP Link Controller: 14.1.0 - 15.0.1.4
BIG-IP PEM: 14.1.0 - 15.0.1.4
CPE2.3- cpe:2.3:h:f5_networks:big-ip:14.1.3.1:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip:15.0.1.4:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_ltm:14.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_ltm:14.1.0.3.0.79.6-ENG Hotfix:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_ltm:14.1.0.3.0.97.6-ENG Hotfix:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_aam:14.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_aam:14.1.0.3.0.79.6:ENG Hotfix:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_aam:14.1.0.3.0.97.6:ENG Hotfix:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_afm:14.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_afm:14.1.0.3.0.79.6:ENG Hotfix:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_analytics:14.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_apm:14.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_asm:14.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_dns:14.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_fps:14.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_gtm:14.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_link_controller:14.1.0:*:*:*:*:*:*:*
- cpe:2.3:h:f5_networks:big-ip_pem:14.1.0:*:*:*:*:*:*:*
http://support.f5.com/csp/article/K02333782
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.
