CVE-2020-8156
Quick assessment
Affected
n/a Nextcloud Mail
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.
Nextcloud是德国Nextcloud公司的一套开源的自托管文件同步和共享的通信应用平台。 Nextcloud Mail 1.1.3版本中存在信任管理问题漏洞，该漏洞源于缺少对TLS主机的验证。攻击者可利用该漏洞发起中间人攻击。
Possible ATT&CK Techniques 1 AI
T1557 · Adversary-in-the-Middle
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I. Basic Information for CVE-2020-8156
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A missing verification of the TLS host in Nextcloud Mail 1.1.3 allowed a man in the middle attack.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Nextcloud Mail 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nextcloud是德国Nextcloud公司的一套开源的自托管文件同步和共享的通信应用平台。 Nextcloud Mail 1.1.3版本中存在信任管理问题漏洞，该漏洞源于缺少对TLS主机的验证。攻击者可利用该漏洞发起中间人攻击。
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 |
|---|---|---|---|---|
| - | Nextcloud Mail | 1.1.4 | - |
|
II. Public POCs for CVE-2020-8156
| # | POC Description | Source Link | Shenlong Link |
|---|
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Mailing List Discussions for CVE-2020-8156 (1)
-
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KC6HLX5SG4PZO6Y54D2LFJ4ATG76BKOP/ vendor-advisory x_refsource_FEDORA
Other References for CVE-2020-8156 (1)
-
https://nextcloud.com/security/advisory/?id=NC-SA-2020-020 x_refsource_MISC
Same Patch Batch · n/a · 2020-05-12 · 14 CVEs total
| CVE-2020-8154 | Nextcloud Server 安全漏洞 | |
| CVE-2020-8155 | Nextcloud Server 跨站脚本漏洞 | |
| CVE-2020-8153 | Nextcloud Groupfolders app 访问控制错误漏洞 | |
| CVE-2020-8151 | Active Resource 信息泄露漏洞 | |
| CVE-2020-8159 | actionpack_page-caching gem 路径遍历漏洞 | |
| CVE-2020-1939 | Apache NuttX 代码问题漏洞 | |
| CVE-2020-5897 | F5 BIG-IP APM和BIG-IP APM Clients 资源管理错误漏洞 | |
| CVE-2020-5896 | F5 BIG-IP APM和BIG-IP APM Clients 安全漏洞 | |
| CVE-2020-5898 | F5 BIG-IP APM和BIG-IP APM Clients 安全漏洞 | |
| CVE-2020-12823 | OpenConnect 缓冲区错误漏洞 | |
| CVE-2020-12825 | libcroco 缓冲区错误漏洞 | |
| CVE-2020-12826 | Linux kernel 输入验证错误漏洞 | |
| CVE-2020-12772 | Ignite Realtime Spark 信息泄露漏洞 |
IV. Related Vulnerabilities
Same product: Nextcloud Mail
Same vendor: n/a
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Same weakness: CWE-295
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V. Comments for CVE-2020-8156
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