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CVE-2024-21771— F5 AFM Signature Matching Vulnerability

Quick assessment

Affected
F5 BIG-IP
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

F5 BIG-IP AFM是美国F5公司的一款用于防护DDos攻击的高级防火墙产品。 F5 BIG-IP AFM 存在安全漏洞，该漏洞源于对于未指定的流量模式，BIG-IP AFM IPS 引擎可能会花费过多的时间将流量与签名进行匹配，从而导致流量管理微内核 (TMM) 重新启动和流量中断。

CVSS 7.5 · High EPSS 0.52% · P42

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2024-21771

Vulnerability Information
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Vulnerability Title
F5 AFM Signature Matching Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
For unspecified traffic patterns, BIG-IP AFM IPS engine may spend an excessive amount of time matching the traffic against signatures, resulting in Traffic Management Microkernel (TMM) restarting and traffic disruption.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
F5 BIG-IP AFM 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
F5 BIG-IP AFM是美国F5公司的一款用于防护DDos攻击的高级防火墙产品。 F5 BIG-IP AFM 存在安全漏洞，该漏洞源于对于未指定的流量模式，BIG-IP AFM IPS 引擎可能会花费过多的时间将流量与签名进行匹配，从而导致流量管理微内核 (TMM) 重新启动和流量中断。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
F5 BIG-IP 17.1.0 ~ 17.1.1 -

II. Public POCs for CVE-2024-21771

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III. Intelligence Information for CVE-2024-21771

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Vendor Advisories for CVE-2024-21771 (1)

Same Patch Batch · F5 · 2024-02-14 · 20 CVEs total

CVE-2024-22093 8.7 HIGH Appliance mode iControl REST vulnerability
CVE-2024-21763 7.5 HIGH BIG-IP AFM vulnerability
CVE-2024-23979 7.5 HIGH BIG-IP SSL Client Certificate LDAP and CRLDP Authentication profiles vulnerability
CVE-2024-21849 7.5 HIGH BIG-IP Websockets vulnerability
CVE-2024-23314 7.5 HIGH BIG-IP HTTP/2 vulnerability
CVE-2024-24775 7.5 HIGH BIG-IP TMM vulnerability
CVE-2024-23805 7.5 HIGH F5 Application Visibility and Reporting module and BIG-IP Advanced WAF/ASM vulnerability
CVE-2024-23308 7.5 HIGH BIG-IP Advanced WAF and ASM vulnerability
CVE-2024-21789 7.5 HIGH BIG-IP ASM and Advanced WAF vulnerability
CVE-2024-24990 7.5 HIGH NGINX HTTP/3 QUIC vulnerability
CVE-2024-24989 7.5 HIGH NGINX HTTP/3 QUIC vulnerability
CVE-2024-23982 7.5 HIGH BIG-IP PEM vulnerability
CVE-2024-22389 7.2 HIGH BIG-IP iControl REST API Vulnerability
CVE-2024-23306 7.1 HIGH BIG-IP Next CNF & SPK vulnerability
CVE-2024-21782 6.7 MEDIUM BIG-IP and BIG-IQ secure copy vulnerability
CVE-2024-24966 6.2 MEDIUM F5OS vulnerability
CVE-2024-23976 6.0 MEDIUM BIG-IP Appliance mode iAppsLX vulnerability
CVE-2024-23607 5.5 MEDIUM F5OS QKView utility vulnerability
CVE-2024-23603 3.8 LOW BIG-IP Advanced WAF and ASM Configuration utility vulnerability

IV. Related Vulnerabilities

Same product: BIG-IP
Same vendor: F5
Same weakness: CWE-770

V. Comments for CVE-2024-21771

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