CVE-2016-9250 in BIG-IP
Summary
by MITRE
In F5 BIG-IP 11.2.1, 11.4.0 through 11.6.1, and 12.0.0 through 12.1.2, an unauthenticated user with access to the control plane may be able to delete arbitrary files through an undisclosed mechanism.
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Analysis
by VulDB Data Team • 12/06/2022
The vulnerability identified as CVE-2016-9250 represents a critical security flaw in F5 BIG-IP application delivery controllers affecting multiple version ranges including 11.2.1, 11.4.0 through 11.6.1, and 12.0.0 through 12.1.2. This issue stems from insufficient access controls and improper input validation within the control plane interface, creating a path for unauthorized file deletion operations. The vulnerability is particularly concerning because it allows unauthenticated attackers with access to the control plane to execute arbitrary file deletion commands, potentially compromising the entire system integrity and operational continuity of network services.
The technical implementation of this vulnerability involves an undisclosed mechanism that permits file deletion operations without proper authentication or authorization checks. When an attacker gains access to the control plane, they can exploit this flaw to manipulate file system operations and remove critical system files, configuration data, or application components. This weakness typically arises from inadequate sandboxing of control plane operations and failure to properly validate user inputs or permissions before executing destructive file system commands. The vulnerability maps to CWE-284 which describes improper access control, and specifically relates to the lack of authentication requirements for critical system operations.
From an operational standpoint, the impact of CVE-2016-9250 extends beyond simple data loss to encompass complete system compromise and service disruption. An attacker exploiting this vulnerability can delete essential system files, configuration databases, or even critical application components, leading to complete system failure or requiring extensive recovery procedures. The unauthenticated nature of the exploit means that attackers do not need valid credentials to initiate destructive operations, making the attack surface significantly larger than typical access control violations. This vulnerability directly impacts the availability and integrity of network services managed by F5 BIG-IP systems, potentially affecting thousands of applications and users dependent on these critical infrastructure components.
Organizations affected by this vulnerability should implement immediate mitigations including applying the latest security patches from F5, which address the underlying access control issues and proper input validation mechanisms. Network segmentation should be implemented to limit access to control plane interfaces, ensuring that only authorized personnel can access these critical system components. Additionally, implementing strict monitoring and logging of control plane activities can help detect unauthorized file deletion attempts and provide early warning of potential exploitation. The mitigation strategies should align with ATT&CK framework techniques related to privilege escalation and defense evasion, particularly focusing on preventing unauthorized system modifications and maintaining system integrity. Regular security assessments and vulnerability scanning should be conducted to identify similar issues in other network infrastructure components and ensure comprehensive protection against similar attack vectors.