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CVE-2023-43746— BIG-IP Appliance mode external monitor 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是美国F5公司的一款集成了网络流量管理、应用程序安全管理、负载均衡等功能的应用交付平台。 F5 BIG-IP 存在安全漏洞，该漏洞源于在设备模式下运行时，分配了管理员角色的经过身份验证的用户可能能够绕过设备模式限制，利用 BIG-IP 系统上的 BIG-IP 外部监视器。

CVSS 8.7 · High EPSS 0.43% · P36

Possible ATT&CK Techniques 1 AI

T1548.002 · Bypass User Account Control
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I. Basic Information for CVE-2023-43746

Vulnerability Information
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Vulnerability Title
BIG-IP Appliance mode external monitor vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
When running in Appliance mode, an authenticated user assigned the Administrator role may be able to bypass Appliance mode restrictions, utilizing BIG-IP external monitor on a BIG-IP system.  A successful exploit can allow the attacker to cross a security boundary.  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:H/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
特权定义了不安全动作
Source: CVE Program / CVE List V5
Vulnerability Title
F5 BIG-IP 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
F5 BIG-IP是美国F5公司的一款集成了网络流量管理、应用程序安全管理、负载均衡等功能的应用交付平台。 F5 BIG-IP 存在安全漏洞，该漏洞源于在设备模式下运行时，分配了管理员角色的经过身份验证的用户可能能够绕过设备模式限制，利用 BIG-IP 系统上的 BIG-IP 外部监视器。
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 ~ * -

II. Public POCs for CVE-2023-43746

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III. Intelligence Information for CVE-2023-43746

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Vendor Advisories for CVE-2023-43746 (1)

Same Patch Batch · F5 · 2023-10-10 · 15 CVEs total

CVE-2023-41373 9.9 CRITICAL BIG-IP Configuration Utility vulnerability
CVE-2023-40537 8.1 HIGH Multi-blade VIPRION Configuration utility session cookie vulnerability
CVE-2023-43611 7.8 HIGH BIG-IP Edge Client for macOS vulnerability
CVE-2023-41085 7.5 HIGH BIG-IP IPSEC vulnerability
CVE-2023-40542 7.5 HIGH BIG-IP TCP Profile vulnerability
CVE-2023-40534 7.5 HIGH BIG-IP HTTP/2 vulnerability
CVE-2023-45226 7.4 HIGH BIG-IP Next SPK SSH vulnerability
CVE-2023-5450 7.3 HIGH BIG-IP Edge Client for macOS vulnerability
CVE-2023-42768 7.2 HIGH BIG-IP iControl REST vulnerability
CVE-2023-43485 5.5 MEDIUM BIGIP and BIG-IQ TACACS+ audit log Vulnerability
CVE-2023-41253 5.5 MEDIUM BIG-IP DNS TSIG Key vulnerability
CVE-2023-45219 4.4 MEDIUM BIG-IP tmsh vulnerability
CVE-2023-39447 4.4 MEDIUM BIG-IP APM Guided Configuration vulnerability
CVE-2023-41964 4.3 MEDIUM BIG-IP and BIG-IQ Database Variable vulnerability

IV. Related Vulnerabilities

Same product: BIG-IP
Same vendor: F5
Same weakness: CWE-267

V. Comments for CVE-2023-43746

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