CVE-2021-23012 is a high-severity vulnerability affecting F5 BIG-IP products. This vulnerability allows users granted either "Resource Administrator" or "Administrator" roles to execute arbitrary bash commands due to a lack of input validation in the system support functionality. The affected versions include 16.0.x prior to 16.0.1.1, 15.1.x prior to 15.1.3, 14.1.x prior to 14.1.4, and 13.1.x prior to 13.1.4. Given the potential impact, organizations should prioritize patching immediately.
The CVSS score for this vulnerability is 8.2, indicating a high severity level. This score reflects the potential for attackers to exploit the vulnerability with low complexity and high privileges required. The risk to organizations includes unauthorized command execution, which could lead to severe data breaches or system compromises.
Currently, there are no known public exploits for this vulnerability, and it is not listed in the Known Exploited Vulnerabilities (KEV) catalog. However, the potential for future exploitation remains a concern due to the ease of command execution for privileged users.
Organizations using vulnerable versions of F5 BIG-IP need to act swiftly to mitigate risks associated with this vulnerability. Patching should be prioritized in the upcoming maintenance cycles to protect against potential exploitations.
Vulnerability Details
On BIG-IP versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.3, 14.1.x before 14.1.4, and 13.1.x before 13.1.4, lack of input validation for items used in the system support functionality may allow users granted either "Resource Administrator" or "Administrator" roles to execute arbitrary bash commands on BIG-IP. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
The CVSS score is 8.2, categorized as high severity. This score reflects the potential impact on confidentiality, integrity, and availability, with high confidentiality and integrity impacts, and high availability impact as well.
Technical Analysis
The root cause of this vulnerability is the insufficient input validation in the system support functionality of F5 BIG-IP. Attackers with high-level privileges can exploit this by executing arbitrary commands, which requires no user interaction. The attack vector is classified as local, meaning the attacker must have access to the internal network to exploit the vulnerability.
The attack complexity is low, making it easier for attackers to exploit this vulnerability if they are able to gain the necessary access. The impact on confidentiality, integrity, and availability is classified as high, which highlights the severe implications of a successful attack.
Risk & Impact Analysis
The vulnerability poses a significant risk to organizations using affected versions of F5 BIG-IP. The ability for users with high-level roles to execute arbitrary commands opens the door for potential system compromise, data breaches, and unauthorized access to sensitive information.
Organizations should assess the potential blast radius of this vulnerability, as it may affect critical infrastructure and services. Given the high CVSS score and the lack of known exploits, immediate action is recommended to patch the affected systems and mitigate risks.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The following versions of F5 BIG-IP are affected by this vulnerability:
BIG-IP versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.3, 14.1.x before 14.1.4, and 13.1.x before 13.1.4. Organizations should ensure they are not using these versions to mitigate potential risks.
Mitigation & Remediation
Organizations should prioritize applying patches to affected BIG-IP versions as soon as possible. The vendor has released updates to address this vulnerability.
For further details on the patching process and available updates, organizations can refer to the vendor's advisory. Additionally, implementing strict access controls and monitoring for unusual activities can help mitigate risks associated with this vulnerability.
Penetration testing can also be beneficial to identify similar weaknesses.
Detection Guidance
To detect potential exploitation attempts, organizations should monitor logs for any unexpected command executions or alterations in user privileges. Behavioral anomalies in system performance can also indicate malicious activity.
AppSecure Threat Intelligence Insight
CVE-2021-23012 highlights the ongoing need for organizations to maintain robust input validation practices. This vulnerability serves as a reminder of the importance of regular security assessments and updates to prevent similar issues in the future.
As a strategic takeaway, organizations should integrate security testing into their development lifecycle to identify and remediate vulnerabilities early. Regular reviews of access controls and user roles can also help minimize the potential for exploitation.
Security testing best practices should be adopted to ensure comprehensive coverage of security risks.
A well-designed vulnerability management program can assist in tracking and addressing vulnerabilities effectively.
API security testing should also be a focus area for organizations using APIs in their services.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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