CVE Vulnerabilities


Unrestricted Upload of File with Dangerous Type

Published: Mar 31, 2021 | Modified: Apr 05, 2021
CVSS 3.x
CVSS 2.x

On versions 16.0.x before, 15.1.x before, 14.1.x before 14.1.4, 13.1.x before, 12.1.x before, and 11.6.x before, the upload functionality in BIG-IP Advanced WAF and BIG-IP ASM allows an authenticated user to upload files to the BIG-IP system using a call to an undisclosed iControl REST endpoint. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.


The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product’s environment.

Affected Software

Name Vendor Start Version End Version
Big-ip_access_policy_manager F5 11.6.1 (including) (excluding)
Big-ip_access_policy_manager F5 12.1.0 (including) (excluding)
Big-ip_access_policy_manager F5 13.1.0 (including) (excluding)
Big-ip_access_policy_manager F5 14.1.0 (including) 14.1.4 (excluding)
Big-ip_access_policy_manager F5 15.1.0 (including) (excluding)
Big-ip_access_policy_manager F5 16.0.0 (including) (excluding)
Big-ip_advanced_firewall_manager F5 11.6.1 (including) (excluding)
Big-ip_advanced_firewall_manager F5 12.1.0 (including) (excluding)
Big-ip_advanced_firewall_manager F5 13.1.0 (including) (excluding)
Big-ip_advanced_firewall_manager F5 14.1.0 (including) 14.1.4 (excluding)
Big-ip_advanced_firewall_manager F5 15.1.0 (including) (excluding)
Big-ip_advanced_firewall_manager F5 16.0.0 (including) (excluding)
Big-ip_advanced_web_application_firewall F5 11.6.1 (including) (excluding)
Big-ip_advanced_web_application_firewall F5 12.1.0 (including) (excluding)
Big-ip_advanced_web_application_firewall F5 13.1.0 (including) (excluding)
Big-ip_advanced_web_application_firewall F5 14.1.0 (including) 14.1.4 (excluding)
Big-ip_advanced_web_application_firewall F5 15.1.0 (including) (excluding)
Big-ip_advanced_web_application_firewall F5 16.0.0 (including) (excluding)
Big-ip_analytics F5 11.6.1 (including) (excluding)
Big-ip_analytics F5 12.1.0 (including) (excluding)
Big-ip_analytics F5 13.1.0 (including) (excluding)
Big-ip_analytics F5 14.1.0 (including) 14.1.4 (excluding)
Big-ip_analytics F5 15.1.0 (including) (excluding)
Big-ip_analytics F5 16.0.0 (including) (excluding)
Big-ip_application_acceleration_manager F5 11.6.1 (including) (excluding)
Big-ip_application_acceleration_manager F5 12.1.0 (including) (excluding)
Big-ip_application_acceleration_manager F5 13.1.0 (including) (excluding)
Big-ip_application_acceleration_manager F5 14.1.0 (including) 14.1.4 (excluding)
Big-ip_application_acceleration_manager F5 15.1.0 (including) (excluding)
Big-ip_application_acceleration_manager F5 16.0.0 (including) (excluding)
Big-ip_application_security_manager F5 11.6.1 (including) (excluding)
Big-ip_application_security_manager F5 12.1.0 (including) (excluding)
Big-ip_application_security_manager F5 13.1.0 (including) (excluding)
Big-ip_application_security_manager F5 14.1.0 (including) 14.1.4 (excluding)
Big-ip_application_security_manager F5 15.1.0 (including) (excluding)
Big-ip_application_security_manager F5 16.0.0 (including) (excluding)
Big-ip_ddos_hybrid_defender F5 11.6.1 (including) (excluding)
Big-ip_ddos_hybrid_defender F5 12.1.0 (including) (excluding)
Big-ip_ddos_hybrid_defender F5 13.1.0 (including) (excluding)
Big-ip_ddos_hybrid_defender F5 14.1.0 (including) 14.1.4 (excluding)
Big-ip_ddos_hybrid_defender F5 15.1.0 (including) (excluding)
Big-ip_ddos_hybrid_defender F5 16.0.0 (including) (excluding)
Big-ip_domain_name_system F5 11.6.1 (including) (excluding)
Big-ip_domain_name_system F5 12.1.0 (including) (excluding)
Big-ip_domain_name_system F5 13.1.0 (including) (excluding)
Big-ip_domain_name_system F5 14.1.0 (including) 14.1.4 (excluding)
Big-ip_domain_name_system F5 15.1.0 (including) (excluding)
Big-ip_domain_name_system F5 16.0.0 (including) (excluding)
Big-ip_fraud_protection_service F5 11.6.1 (including) (excluding)
Big-ip_fraud_protection_service F5 12.1.0 (including) (excluding)
Big-ip_fraud_protection_service F5 13.1.0 (including) (excluding)
Big-ip_fraud_protection_service F5 14.1.0 (including) 14.1.4 (excluding)
Big-ip_fraud_protection_service F5 15.1.0 (including) (excluding)
Big-ip_fraud_protection_service F5 16.0.0 (including) (excluding)
Big-ip_global_traffic_manager F5 11.6.1 (including) (excluding)
Big-ip_global_traffic_manager F5 12.1.0 (including) (excluding)
Big-ip_global_traffic_manager F5 13.1.0 (including) (excluding)
Big-ip_global_traffic_manager F5 14.1.0 (including) 14.1.4 (excluding)
Big-ip_global_traffic_manager F5 15.1.0 (including) (excluding)
Big-ip_global_traffic_manager F5 16.0.0 (including) (excluding)
Big-ip_link_controller F5 11.6.1 (including) (excluding)
Big-ip_link_controller F5 12.1.0 (including) (excluding)
Big-ip_link_controller F5 13.1.0 (including) (excluding)
Big-ip_link_controller F5 14.1.0 (including) 14.1.4 (excluding)
Big-ip_link_controller F5 15.1.0 (including) (excluding)
Big-ip_link_controller F5 16.0.0 (including) (excluding)
Big-ip_local_traffic_manager F5 11.6.1 (including) (excluding)
Big-ip_local_traffic_manager F5 12.1.0 (including) (excluding)
Big-ip_local_traffic_manager F5 13.1.0 (including) (excluding)
Big-ip_local_traffic_manager F5 14.1.0 (including) 14.1.4 (excluding)
Big-ip_local_traffic_manager F5 15.1.0 (including) (excluding)
Big-ip_local_traffic_manager F5 16.0.0 (including) (excluding)
Big-ip_policy_enforcement_manager F5 11.6.1 (including) (excluding)
Big-ip_policy_enforcement_manager F5 12.1.0 (including) (excluding)
Big-ip_policy_enforcement_manager F5 13.1.0 (including) (excluding)
Big-ip_policy_enforcement_manager F5 14.1.0 (including) 14.1.4 (excluding)
Big-ip_policy_enforcement_manager F5 15.1.0 (including) (excluding)
Big-ip_policy_enforcement_manager F5 16.0.0 (including) (excluding)
Ssl_orchestrator F5 11.6.1 (including) (excluding)
Ssl_orchestrator F5 12.1.0 (including) (excluding)
Ssl_orchestrator F5 13.1.0 (including) (excluding)
Ssl_orchestrator F5 14.1.0 (including) 14.1.4 (excluding)
Ssl_orchestrator F5 15.1.0 (including) (excluding)
Ssl_orchestrator F5 16.0.0 (including) (excluding)

Potential Mitigations

  • Assume all input is malicious. Use an “accept known good” input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
  • When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, “boat” may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as “red” or “blue.”
  • Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code’s environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
  • For example, limiting filenames to alphanumeric characters can help to restrict the introduction of unintended file extensions.
  • Run the code in a “jail” or similar sandbox environment that enforces strict boundaries between the process and the operating system. This may effectively restrict which files can be accessed in a particular directory or which commands can be executed by the software.
  • OS-level examples include the Unix chroot jail, AppArmor, and SELinux. In general, managed code may provide some protection. For example, in the Java SecurityManager allows the software to specify restrictions on file operations.
  • This may not be a feasible solution, and it only limits the impact to the operating system; the rest of the application may still be subject to compromise.
  • Be careful to avoid CWE-243 and other weaknesses related to jails.