F5 · BIG-IP Traffic Management Microkernel
CVE-2021-22991
F5 BIG-IP Traffic Management Microkernel Buffer Overflow
这是什么
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.
CISA: The Traffic Management Microkernel of BIG-IP ASM Risk Engine has a buffer overflow vulnerability, leading to a bypassing of URL-based access controls.
该怎么做
Apply updates per vendor instructions.
美国联邦机构的修复期限：2022年2月1日
F5 的其他被利用漏洞
| 加入日期 | 漏洞 | 产品 | 严重程度 | 受攻击概率 |
|---|---|---|---|---|
| 2026年9月22日 | Heap-based Buffer Overflow | BIG-IP APM | 严重 9.3 | 25% |
| 2026年3月27日 | Stack-Based Buffer Overflow | BIG-IP | 严重 9.3 | 2.3% |
| 2023年10月31日 | Authentication Bypass | BIG-IP Configuration Utility | 严重 9.8 | 97% |
| 2023年10月31日 | SQL Injection | BIG-IP Configuration Utility | 高 8.8 | 4.2% |
| 2022年5月10日 | Missing Authentication | BIG-IP | 严重 9.8 | >99.9% |
| 2021年11月3日 | Traffic Management User Interface (TMUI) Remote Code Execution | BIG-IP | 严重 9.8 | >99.9% |
| 2021年11月3日 | iControl REST Remote Code Execution | BIG-IP and BIG-IQ Centralized Management | 严重 9.8 | 99.9% |
来源：Known Exploited Vulnerabilities（CISA，公有领域）、CVE records（cve.org）和 EPSS（FIRST）。受攻击概率是 EPSS 对未来 30 天内有人尝试利用该漏洞的估计。