CVE-2021-34453— Microsoft Exchange Server Denial of Service Vulnerability
Quick assessment
Affected
Microsoft Microsoft Exchange Server 2019 Cumulative Update 11
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.
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存在输入验证错误漏洞。以下产品和版本受到影响：Microsoft Exchange Server 2016 Cumulative Update 22,Microsoft Exchange Server 2019 Cumulative Update 11,Microsoft Exchange
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-34453
Vulnerability Information
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Vulnerability Title
Microsoft Exchange Server Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Microsoft Exchange Server Denial of Service Vulnerability
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Exchange Server 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
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存在输入验证错误漏洞。以下产品和版本受到影响：Microsoft Exchange Server 2016 Cumulative Update 22,Microsoft Exchange Server 2019 Cumulative Update 11,Microsoft Exchange
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 |
|---|---|---|---|---|
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 11 | 15.02.0 ~ 15.02.0986.009 |
cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_11:*:*:*:*:*:*
|
|
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 10 | 15.02.0 ~ 15.02.0922.014 |
cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_10:*:*:*:*:*:*
|
|
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 21 | 15.01.0 ~ 15.01.2308.015 |
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_21:*:*:*:*:*:*
|
|
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 22 | 15.0.0 ~ 15.01.2375.012 |
cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_22:*:*:*:*:*:*
|
|
II. Public POCs for CVE-2021-34453
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2021-34453 (1)
Same Patch Batch · Microsoft · 2021-10-13 · 71 CVEs total
| CVE-2021-26427 | 9.0 CRITICAL | Microsoft Exchange Server Remote Code Execution Vulnerability |
| CVE-2021-36970 | 8.8 HIGH | Windows Print Spooler Spoofing Vulnerability |
| CVE-2021-41344 | 8.1 HIGH | Microsoft SharePoint Server Remote Code Execution Vulnerability |
| CVE-2021-40487 | 8.1 HIGH | Microsoft SharePoint Server Remote Code Execution Vulnerability |
| CVE-2021-41348 | 8.0 HIGH | Microsoft Exchange Server Elevation of Privilege Vulnerability |
| CVE-2021-40461 | 8.0 HIGH | Windows Hyper-V Remote Code Execution Vulnerability |
| CVE-2021-38672 | 8.0 HIGH | Windows Hyper-V Remote Code Execution Vulnerability |
| CVE-2021-40464 | 8.0 HIGH | Windows Nearby Sharing Elevation of Privilege Vulnerability |
| CVE-2021-40450 | 7.8 HIGH | Win32k Elevation of Privilege Vulnerability |
| CVE-2021-40462 | 7.8 HIGH | Windows Media Foundation Dolby Digital Atmos Decoders Remote Code Execution Vulnerability |
| CVE-2021-40449 | 7.8 HIGH | Win32k Elevation of Privilege Vulnerability |
| CVE-2021-40473 | 7.8 HIGH | Microsoft Excel Remote Code Execution Vulnerability |
| CVE-2021-40474 | 7.8 HIGH | Microsoft Excel Remote Code Execution Vulnerability |
| CVE-2021-40477 | 7.8 HIGH | Windows Event Tracing Elevation of Privilege Vulnerability |
| CVE-2021-40478 | 7.8 HIGH | Storage Spaces Controller Elevation of Privilege Vulnerability |
| CVE-2021-40480 | 7.8 HIGH | Microsoft Office Visio Remote Code Execution Vulnerability |
| CVE-2021-40485 | 7.8 HIGH | Microsoft Excel Remote Code Execution Vulnerability |
| CVE-2021-40486 | 7.8 HIGH | Microsoft Word Remote Code Execution Vulnerability |
| CVE-2021-40479 | 7.8 HIGH | Microsoft Excel Remote Code Execution Vulnerability |
| CVE-2021-40467 | 7.8 HIGH | Windows Common Log File System Driver Elevation of Privilege Vulnerability |
Showing top 20 of 71 CVEs. View all on vendor page → →
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V. Comments for CVE-2021-34453
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