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CVE-2019-25652— UniFi Network Controller Improper Certificate Validation Leading to Credential Theft via MITM

Quick assessment

Affected
Ubiquiti UniFi Network Controller
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.

Ubiquiti UniFi Network Controller是美国优比快（Ubiquiti）公司的一个集中管理与监控网络设备的控制软件平台。 Ubiquiti UniFi Network Controller 5.10.22之前版本和5.11.18之前的5.11.x版本存在信任管理问题漏洞，该漏洞源于证书验证不当，可能导致相邻网络攻击者进行中间人攻击。

CVSS 7.5 · High EPSS 0.12% · P2

Affected Version Matrix 3

VendorProduct Version RangeStatus
Ubiquiti UniFi Network Controller < 5.6.42 affected
5.6.43< 5.10.22 affected
5.11< 5.11.18 affected
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I. Basic Information for CVE-2019-25652

Vulnerability Information
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Vulnerability Title
UniFi Network Controller Improper Certificate Validation Leading to Credential Theft via MITM
Source: CVE Program / CVE List V5
Vulnerability Description
UniFi Network Controller before version 5.10.22 and 5.11.x before 5.11.18 contains an improper certificate verification vulnerability that allows adjacent network attackers to conduct man-in-the-middle attacks by presenting a false SSL certificate during SMTP connections. Attackers can intercept SMTP traffic and obtain credentials by exploiting the insecure SSL host verification mechanism in the SMTP certificate validation process.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Ubiquiti UniFi Network Controller 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Ubiquiti UniFi Network Controller是美国优比快（Ubiquiti）公司的一个集中管理与监控网络设备的控制软件平台。 Ubiquiti UniFi Network Controller 5.10.22之前版本和5.11.18之前的5.11.x版本存在信任管理问题漏洞，该漏洞源于证书验证不当，可能导致相邻网络攻击者进行中间人攻击。
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
Ubiquiti UniFi Network Controller 0 ~ 5.6.42 -

II. Public POCs for CVE-2019-25652

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III. Intelligence Information for CVE-2019-25652

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Vendor Advisories for CVE-2019-25652 (2)

IV. Related Vulnerabilities

Same product: UniFi Network Controller
Same vendor: Ubiquiti
Same weakness: CWE-295