CVE-2021-26855— Microsoft Exchange Server 代码问题漏洞
一分钟漏洞结论
影响对象
Microsoft Microsoft Exchange Server 2013 Cumulative Update 21
利用判断
已确认在野利用，应立即处置
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Microsoft Exchange Server是美国微软（Microsoft）公司的一套电子邮件服务程序。它提供邮件存取、储存、转发，语音邮件，邮件过滤筛选等功能。 Microsoft Exchange Server 安全漏洞。攻击者可构造恶意HTTP请求，并通过Exchange Server进行身份验证。进而扫描内网，获取用户敏感信息。以下产品和版本受到影响：Microsoft Exchange Server 2013 Cumulative Update 23,Microsoft Exchange
公开利用映射 8
ExploitDB · 4
EDB-49663 [remote]
EDB-49637#CVE-2021-26855 [webapps]
EDB-49879 [webapps]
EDB-49895 [webapps]
Metasploit · 3
exchange_proxylogon_rce.rb#CVE-2021-26855 [exploit]
exchange_proxylogon.rb [auxiliary]
exchange_proxylogon_collector.rb [auxiliary]
Nuclei · 1
CVE-2021-26855.yaml [template]
已观察到在野利用
cisa_kev · confirmed
可能的 ATT&CK 技术 1 AI
T1190 · Exploit Public-Facing Application影响版本矩阵 24
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一、 漏洞 CVE-2021-26855 基础信息
漏洞信息
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Vulnerability Title
Microsoft Exchange Server Remote Code Execution Vulnerability
来源: CVE Program / CVE List V5
Vulnerability Description
Microsoft Exchange Server Remote Code Execution Vulnerability
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
Microsoft Exchange Server 代码问题漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Microsoft Exchange Server是美国微软（Microsoft）公司的一套电子邮件服务程序。它提供邮件存取、储存、转发，语音邮件，邮件过滤筛选等功能。 Microsoft Exchange Server 安全漏洞。攻击者可构造恶意HTTP请求，并通过Exchange Server进行身份验证。进而扫描内网，获取用户敏感信息。以下产品和版本受到影响：Microsoft Exchange Server 2013 Cumulative Update 23,Microsoft Exchange
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2021-26855 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|---|---|---|
| 1 | IoC determination for exploitation of CVE-2021-26855, CVE-2021-26857, CVE-2021-26858 and CVE-2021-27065. | https://github.com/sgnls/exchange-0days-202103 | POC详情 |
| 2 | A PowerShell script to identify indicators of exploitation of CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, and CVE-2021-26865 | https://github.com/soteria-security/HAFNIUM-IOC | POC详情 |
| 3 | Detect webshells dropped on Microsoft Exchange servers exploited through "proxylogon" group of vulnerabilites (CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, CVE-2021-27065) | https://github.com/cert-lv/exchange_webshell_detection | POC详情 |
| 4 | Microsoft Exchange Server SSRF漏洞(CVE-2021-26855) | https://github.com/conjojo/Microsoft_Exchange_Server_SSRF_CVE-2021-26855 | POC详情 |
| 5 | This script helps to identify CVE-2021-26855 ssrf Poc | https://github.com/pussycat0x/CVE-2021-26855-SSRF | POC详情 |
| 6 | CVE-2021-26855 SSRF Exchange Server | https://github.com/La3B0z/CVE-2021-26855-SSRF-Exchange | POC详情 |
| 7 | Module pack for #ProxyLogon (part. of my contribute for Metasploit-Framework) [CVE-2021-26855 && CVE-2021-27065] | https://github.com/mekhalleh/exchange_proxylogon | POC详情 |
| 8 | POC of CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, and CVE-2021-26865, ProxyLogon poc | https://github.com/Yt1g3r/CVE-2021-26855_SSRF | POC详情 |
| 9 | CVE-2021-26855 exp | https://github.com/hackerxj007/CVE-2021-26855 | POC详情 |
| 10 | A fast tool to mass scan for a vulnerability on Microsoft Exchange Server that allows an attacker bypassing the authentication and impersonating as the admin (CVE-2021-26855). | https://github.com/dwisiswant0/proxylogscan | POC详情 |
| 11 | This script test the CVE-2021-26855 vulnerability on Exchange Server. | https://github.com/mauricelambert/ExchangeWeaknessTest | POC详情 |
| 12 | CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, CVE-2021-27065 | https://github.com/DCScoder/Exchange_IOC_Hunter | POC详情 |
| 13 | PoC exploit code for CVE-2021-26855 | https://github.com/srvaccount/CVE-2021-26855-PoC | POC详情 |
| 14 | None | https://github.com/h4x0r-dz/CVE-2021-26855 | POC详情 |
| 15 | None | https://github.com/alt3kx/CVE-2021-26855_PoC | POC详情 |
| 16 | CVE-2021-26855, also known as Proxylogon, is a server-side request forgery (SSRF) vulnerability in Exchange that allows an attacker to send arbitrary HTTP requests and authenticate as the Exchange server. | https://github.com/raheel0x01/CVE-2021-26855 | POC详情 |
| 17 | PoC of proxylogon chain SSRF(CVE-2021-26855) to write file by testanull, censored by github | https://github.com/hackerschoice/CVE-2021-26855 | POC详情 |
| 18 | CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, CVE-2021-27065 | https://github.com/SCS-Labs/HAFNIUM-Microsoft-Exchange-0day | POC详情 |
| 19 | Scanner and PoC for CVE-2021-26855 | https://github.com/KotSec/CVE-2021-26855-Scanner | POC详情 |
| 20 | RCE exploit for Microsoft Exchange Server (CVE-2021-26855). | https://github.com/hakivvi/proxylogon | POC详情 |
| 21 | CVE-2021-26855: PoC (Not a HoneyPoC for once!) | https://github.com/ZephrFish/Exch-CVE-2021-26855 | POC详情 |
| 22 | RCE exploit for ProxyLogon vulnerability in Microsoft Exchange | https://github.com/mil1200/ProxyLogon-CVE-2021-26855 | POC详情 |
| 23 | CVE-2021-26855 & CVE-2021-27065 | https://github.com/evilashz/ExchangeSSRFtoRCEExploit | POC详情 |
| 24 | patched to work | https://github.com/ZephrFish/Exch-CVE-2021-26855_Priv | POC详情 |
| 25 | None | https://github.com/Mr-xn/CVE-2021-26855-d | POC详情 |
| 26 | ProxyLogon is the formally generic name for CVE-2021-26855, a vulnerability on Microsoft Exchange Server that allows an attacker bypassing the authentication and impersonating as the admin. We have also chained this bug with another post-auth arbitrary-file-write vulnerability, CVE-2021-27065, to get code execution. | https://github.com/RickGeex/ProxyLogon | POC详情 |
| 27 | Chaining CVE-2021-26855 and CVE-2021-26857 to exploit Microsoft Exchange | https://github.com/Immersive-Labs-Sec/ProxyLogon | POC详情 |
| 28 | None | https://github.com/shacojx/Scan-Vuln-CVE-2021-26855 | POC详情 |
| 29 | CVE-2021-26855 proxyLogon metasploit exploit script | https://github.com/TaroballzChen/ProxyLogon-CVE-2021-26855-metasploit | POC详情 |
| 30 | ProxyLogon(CVE-2021-26855+CVE-2021-27065) Exchange Server RCE(SSRF->GetWebShell) | https://github.com/p0wershe11/ProxyLogon | POC详情 |
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CVE-2021-26855 厂商安全公告 (2)
CVE-2021-26855 公开利用代码 (4)
同批安全公告 · Microsoft · 2021-03-02 · 共 7 条
| CVE-2021-27078 | 9.1 CRITICAL | Microsoft Exchange Server 安全漏洞 |
| CVE-2021-26412 | 9.1 CRITICAL | Microsoft Exchange Server 安全漏洞 |
| CVE-2021-27065 | 7.8 HIGH | Microsoft Exchange Server 路径遍历漏洞 |
| CVE-2021-26858 | 7.8 HIGH | Microsoft Exchange Server 安全漏洞 |
| CVE-2021-26857 | 7.8 HIGH | Microsoft Exchange Server 代码问题漏洞 |
| CVE-2021-26854 | 6.6 MEDIUM | Microsoft Exchange Server 安全漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2021-26855
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