MitM-attack in BIG-IP SSL/TLS implementation
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-22981 |
| CWE-ID | CWE-310 |
| Exploitation vector | Network |
| Public exploit | N/A |
| 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 |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Cryptographic issues
EUVDB-ID: #VU50609
Risk: Low
CVSSv3.1: 3.7 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-22981
CWE-ID:
CWE-310 - Cryptographic Issues
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform MitM attack.
The vulnerability exists due to the original TLS protocol includes a weakness in the master secret negotiation that is mitigated by the Extended Master Secret (EMS) extension defined in RFC 7627. TLS connections that do not use EMS are vulnerable to man-in-the-middle attacks during renegotiation.
MitigationInstall updates from vendor's website.
The issue is fixed starting from 13.0.0 branch.
BIG-IP: 11.6.1 HF1 - 12.1.5.2
BIG-IP LTM: 11.6.1 HF1 - 12.1.5.2
BIG-IP AAM: 11.6.1 HF1 - 12.1.5.2
BIG-IP Advanced WAF: 11.6.1 - 12.1.5.2
BIG-IP AFM: 11.6.1 HF1 - 12.1.5.2
BIG-IP Analytics: 11.6.1 HF1 - 12.1.5.2
BIG-IP APM: 11.6.1 HF1 - 12.1.5.2
BIG-IP ASM: 11.6.1 HF1 - 12.1.5.2
BIG-IP DDHD: 11.6.1 - 12.1.5.2
BIG-IP DNS: 11.6.1 - 12.1.5.2
BIG-IP FPS: 11.6.1 - 12.1.5.2
BIG-IP GTM: 11.6.1 HF1 - 12.1.5.2
BIG-IP Link Controller: 11.6.1 HF1 - 12.1.5.2
BIG-IP PEM: 11.6.1 HF1 - 12.1.5.2
BIG-IP SSLO: 11.6.1 - 12.1.5.2
CPE2.3- cpe:2.3:h:f5_networks:big-ip:11.6.5.2:*:*:*:*:*:*:
- cpe:2.3:h:f5_networks:big-ip:12.1.5.2:*:*:*:*:*:*:
- cpe:2.3:h:f5_networks:big-ip_ltm:11.6.1 HF1:*:*:*:*:*:*:
- cpe:2.3:h:f5_networks:big-ip_ltm:11.6.1:*:*:*:*:*:*:
- cpe:2.3:h:f5_networks:big-ip_ltm:11.6.2 HF1:*:*:*:*:*:*:
- cpe:2.3:h:f5_networks:big-ip_aam:11.6.1:HF1:*:*:*:*:*:
- cpe:2.3:h:f5_networks:big-ip_aam:11.6.1:*:*:*:*:*:*:
- cpe:2.3:h:f5_networks:big-ip_aam:11.6.2:HF1:*:*:*:*:*:
- cpe:2.3:a:f5_networks:big-ip_advanced_waf:11.6.1:*:*:*:*:*:*:
- cpe:2.3:a:f5_networks:big-ip_advanced_waf:11.6.2 HF1:*:*:*:*:*:*:
- cpe:2.3:h:f5_networks:big-ip_afm:11.6.1:HF1:*:*:*:*:*:
- cpe:2.3:h:f5_networks:big-ip_analytics:11.6.1 HF1:*:*:*:*:*:*:
- cpe:2.3:h:f5_networks:big-ip_apm:11.6.1:HF1:*:*:*:*:*:
- cpe:2.3:h:f5_networks:big-ip_asm:11.6.1 HF1:*:*:*:*:*:*:
- cpe:2.3:h:f5_networks:big-ip_ddhd:11.6.1:*:*:*:*:*:*:
- cpe:2.3:h:f5_networks:big-ip_dns:11.6.1:*:*:*:*:*:*:
- cpe:2.3:h:f5_networks:big-ip_fps:11.6.1:*:*:*:*:*:*:
- cpe:2.3:h:f5_networks:big-ip_gtm:11.6.1 HF1:*:*:*:*:*:*:
- cpe:2.3:h:f5_networks:big-ip_link_controller:11.6.1 HF1:*:*:*:*:*:*:
- cpe:2.3:h:f5_networks:big-ip_pem:11.6.1 HF1:*:*:*:*:*:*:
- cpe:2.3:h:f5_networks:big-ip_sslo:11.6.1:*:*:*:*:*:*:
http://support.f5.com/csp/article/K09121542
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.
