CVE-2020-5239— Unspecified vulnerability in the fetchmail script in Mailu
Quick assessment
Affected
Mailu Mailu
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.
Mailu是开源的一个简单但功能齐全的邮件服务器，是一组 Docker 镜像。 Mailu 1.7之前版本中的Mailu fetchmail脚本存在安全漏洞。攻击者可利用该漏洞获取Mailu实例的全部访问权限。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2020-5239
Vulnerability Information
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Vulnerability Title
Unspecified vulnerability in the fetchmail script in Mailu
Source: CVE Program / CVE List V5
Vulnerability Description
In Mailu before version 1.7, an authenticated user can exploit a vulnerability in Mailu fetchmail script and gain full access to a Mailu instance. Mailu servers that have open registration or untrusted users are most impacted. The master and 1.7 branches are patched on our git repository. All Docker images published on docker.io/mailu for tags 1.5, 1.6, 1.7 and master are patched. For detailed instructions about patching and securing the server afterwards, see https://github.com/Mailu/Mailu/issues/1354
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Mailu 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mailu是开源的一个简单但功能齐全的邮件服务器，是一组 Docker 镜像。 Mailu 1.7之前版本中的Mailu fetchmail脚本存在安全漏洞。攻击者可利用该漏洞获取Mailu实例的全部访问权限。
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
II. Public POCs for CVE-2020-5239
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Vendor Advisories for CVE-2020-5239 (1)
-
https://github.com/Mailu/Mailu/security/advisories/GHSA-2467-p5gv-58q6 x_refsource_CONFIRM
Other References for CVE-2020-5239 (1)
-
https://github.com/Mailu/Mailu/issues/1354 x_refsource_MISC
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Same weakness: CWE-863
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V. Comments for CVE-2020-5239
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