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TI-2021-05850 Aliases CVE-2021-22991GHSA-6w8r-pjm3-q7x7

Memory corruption in BIG-IP

Priority CRITICAL 100Exploited in the wildCWE-119Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation Active In CISA KEV since 2022-01-18CISA due date 2022-02-01
EPSS 0.62421 99th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Active
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
—BIG-IP16.0.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, 12.1.x before 12.1.5.3—No fix listedCNA
  • BIG-IP Vendor— Affected 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, 12.1.x before 12.1.5.3 Fixed in — No fix listed CNA

CPE configurations NVD · 14

CPEVersionsRoleVendor
cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*12.1.0 to before 12.1.5.3; 13.1.0 to before 13.1.3.6; 14.1.0 to before 14.1.4; 15.1.0 to before 15.1.2.1; 16.0.0 to before 16.0.1.1VulnerableF5
cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*12.1.0 to before 12.1.5.3; 13.1.0 to before 13.1.3.6; 14.1.0 to before 14.1.4; 15.1.0 to before 15.1.2.1; 16.0.0 to before 16.0.1.1VulnerableF5
cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:*12.1.0 to before 12.1.5.3; 13.1.0 to before 13.1.3.6; 14.1.0 to before 14.1.4; 15.1.0 to before 15.1.2.1; 16.0.0 to before 16.0.1.1VulnerableF5
cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:*12.1.0 to before 12.1.5.3; 13.1.0 to before 13.1.3.6; 14.1.0 to before 14.1.4; 15.1.0 to before 15.1.2.1; 16.0.0 to before 16.0.1.1VulnerableF5
cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:*12.1.0 to before 12.1.5.3; 13.1.0 to before 13.1.3.6; 14.1.0 to before 14.1.4; 15.1.0 to before 15.1.2.1; 16.0.0 to before 16.0.1.1VulnerableF5
cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*12.1.0 to before 12.1.5.3; 13.1.0 to before 13.1.3.6; 14.1.0 to before 14.1.4; 15.1.0 to before 15.1.2.1; 16.0.0 to before 16.0.1.1VulnerableF5
cpe:2.3:a:f5:big-ip_ddos_hybrid_defender:*:*:*:*:*:*:*:*12.1.0 to before 12.1.5.3; 13.1.0 to before 13.1.3.6; 14.1.0 to before 14.1.4; 15.1.0 to before 15.1.2.1; 16.0.0 to before 16.0.1.1VulnerableF5
cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*12.1.0 to before 12.1.5.3; 13.1.0 to before 13.1.3.6; 14.1.0 to before 14.1.4; 15.1.0 to before 15.1.2.1; 16.0.0 to before 16.0.1.1VulnerableF5
cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:*12.1.0 to before 12.1.5.3; 13.1.0 to before 13.1.3.6; 14.1.0 to before 14.1.4; 15.1.0 to before 15.1.2.1; 16.0.0 to before 16.0.1.1VulnerableF5
cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*12.1.0 to before 12.1.5.3; 13.1.0 to before 13.1.3.6; 14.1.0 to before 14.1.4; 15.1.0 to before 15.1.2.1; 16.0.0 to before 16.0.1.1VulnerableF5
  • cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:* Versions 12.1.0 to before 12.1.5.3; 13.1.0 to before 13.1.3.6; 14.1.0 to before 14.1.4; 15.1.0 to before 15.1.2.1; 16.0.0 to before 16.0.1.1 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:* Versions 12.1.0 to before 12.1.5.3; 13.1.0 to before 13.1.3.6; 14.1.0 to before 14.1.4; 15.1.0 to before 15.1.2.1; 16.0.0 to before 16.0.1.1 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:* Versions 12.1.0 to before 12.1.5.3; 13.1.0 to before 13.1.3.6; 14.1.0 to before 14.1.4; 15.1.0 to before 15.1.2.1; 16.0.0 to before 16.0.1.1 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:* Versions 12.1.0 to before 12.1.5.3; 13.1.0 to before 13.1.3.6; 14.1.0 to before 14.1.4; 15.1.0 to before 15.1.2.1; 16.0.0 to before 16.0.1.1 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:* Versions 12.1.0 to before 12.1.5.3; 13.1.0 to before 13.1.3.6; 14.1.0 to before 14.1.4; 15.1.0 to before 15.1.2.1; 16.0.0 to before 16.0.1.1 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:* Versions 12.1.0 to before 12.1.5.3; 13.1.0 to before 13.1.3.6; 14.1.0 to before 14.1.4; 15.1.0 to before 15.1.2.1; 16.0.0 to before 16.0.1.1 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_ddos_hybrid_defender:*:*:*:*:*:*:*:* Versions 12.1.0 to before 12.1.5.3; 13.1.0 to before 13.1.3.6; 14.1.0 to before 14.1.4; 15.1.0 to before 15.1.2.1; 16.0.0 to before 16.0.1.1 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:* Versions 12.1.0 to before 12.1.5.3; 13.1.0 to before 13.1.3.6; 14.1.0 to before 14.1.4; 15.1.0 to before 15.1.2.1; 16.0.0 to before 16.0.1.1 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_fraud_protection_service:*:*:*:*:*:*:*:* Versions 12.1.0 to before 12.1.5.3; 13.1.0 to before 13.1.3.6; 14.1.0 to before 14.1.4; 15.1.0 to before 15.1.2.1; 16.0.0 to before 16.0.1.1 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:* Versions 12.1.0 to before 12.1.5.3; 13.1.0 to before 13.1.3.6; 14.1.0 to before 14.1.4; 15.1.0 to before 15.1.2.1; 16.0.0 to before 16.0.1.1 Vulnerable ·F5
Show 4 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:*12.1.0 to before 12.1.5.3; 13.1.0 to before 13.1.3.6; 14.1.0 to before 14.1.4; 15.1.0 to before 15.1.2.1; 16.0.0 to before 16.0.1.1VulnerableF5
cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*12.1.0 to before 12.1.5.3; 13.1.0 to before 13.1.3.6; 14.1.0 to before 14.1.4; 15.1.0 to before 15.1.2.1; 16.0.0 to before 16.0.1.1VulnerableF5
cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:*12.1.0 to before 12.1.5.3; 13.1.0 to before 13.1.3.6; 14.1.0 to before 14.1.4; 15.1.0 to before 15.1.2.1; 16.0.0 to before 16.0.1.1VulnerableF5
cpe:2.3:a:f5:ssl_orchestrator:*:*:*:*:*:*:*:*12.1.0 to before 12.1.5.3; 13.1.0 to before 13.1.3.6; 14.1.0 to before 14.1.4; 15.1.0 to before 15.1.2.1; 16.0.0 to before 16.0.1.1VulnerableF5
  • cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:* Versions 12.1.0 to before 12.1.5.3; 13.1.0 to before 13.1.3.6; 14.1.0 to before 14.1.4; 15.1.0 to before 15.1.2.1; 16.0.0 to before 16.0.1.1 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:* Versions 12.1.0 to before 12.1.5.3; 13.1.0 to before 13.1.3.6; 14.1.0 to before 14.1.4; 15.1.0 to before 15.1.2.1; 16.0.0 to before 16.0.1.1 Vulnerable ·F5
  • cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:* Versions 12.1.0 to before 12.1.5.3; 13.1.0 to before 13.1.3.6; 14.1.0 to before 14.1.4; 15.1.0 to before 15.1.2.1; 16.0.0 to before 16.0.1.1 Vulnerable ·F5
  • cpe:2.3:a:f5:ssl_orchestrator:*:*:*:*:*:*:*:* Versions 12.1.0 to before 12.1.5.3; 13.1.0 to before 13.1.3.6; 14.1.0 to before 14.1.4; 15.1.0 to before 15.1.2.1; 16.0.0 to before 16.0.1.1 Vulnerable ·F5

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2022-01-18 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2021-22991
  3. 2026-10-03 Alias added: GHSA-6w8r-pjm3-q7x7

References

Advisory 1

  • TI-2023-25230 BIG-IP Configuration utility unauthenticated remote code execution vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-01269 Missing authentication in F5 BIG-IP KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-05845 Server-side request forgery in BIG-IP; BIG-IQ KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-04820 Path traversal in BIG-IP KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05157 GNU Bash through 4.3 processes trailing strings after function definitions in the values… KEVCVSS 3.1CRITICAL 9.8
See all 629 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences