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INFORMATION TECHNOLOGY LABORATORY


NATIONAL VULNERABILITY DATABASE


NATIONAL VULNERABILITY DATABASE


NVD


 1. Vulnerabilities


CVE-2021-34473 DETAIL


CURRENT DESCRIPTION

Microsoft Exchange Server Remote Code Execution Vulnerability This CVE ID is
unique from CVE-2021-31196, CVE-2021-31206.


View Analysis Description


ANALYSIS DESCRIPTION

Microsoft Exchange Server Remote Code Execution Vulnerability This CVE ID is
unique from CVE-2021-31196, CVE-2021-31206.


SEVERITY

 
CVSS Version 3.x CVSS Version 2.0


CVSS 3.x Severity and Metrics:


NIST: NVD
Base Score:  9.8 CRITICAL
Vector:  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H


NVD Analysts use publicly available information to associate vector strings and
CVSS scores. We also display any CVSS information provided within the CVE List
from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly
available information at the time of analysis. The CNA has not provided a score
within the CVE List.


CVSS 2.0 Severity and Metrics:


NIST: NVD
Base Score:  10.0 HIGH
Vector:  (AV:N/AC:L/Au:N/C:C/I:C/A:C)


NVD Analysts use publicly available information to associate vector strings and
CVSS scores. We also display any CVSS information provided within the CVE List
from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly
available information at the time of analysis. The CNA has not provided a score
within the CVE List.




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Hyperlink Resource
http://packetstormsecurity.com/files/163895/Microsoft-Exchange-ProxyShell-Remote-Code-Execution.html
Exploit  Third Party Advisory  VDB Entry 
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34473
Patch  Vendor Advisory  https://www.zerodayinitiative.com/advisories/ZDI-21-821/
Third Party Advisory  VDB Entry 


WEAKNESS ENUMERATION

CWE-ID CWE Name Source NVD-CWE-noinfo Insufficient Information NIST  


KNOWN AFFECTED SOFTWARE CONFIGURATIONS SWITCH TO CPE 2.2


CPES LOADING, PLEASE WAIT.

Configuration 1 ( hide )


 cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_23:*:*:*:*:*:*
   Show Matching CPE(s)
 cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_19:*:*:*:*:*:*
   Show Matching CPE(s)
 cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_20:*:*:*:*:*:*
   Show Matching CPE(s)
 cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_8:*:*:*:*:*:*
   Show Matching CPE(s)
 cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_9:*:*:*:*:*:*
   Show Matching CPE(s)


Denotes Vulnerable Software
Are we missing a CPE here? Please let us know.



CHANGE HISTORY

4 change records found show changes

MODIFIED ANALYSIS 9/21/2021 1:38:08 PM

Action Type Old Value New Value Changed Reference Type

http://packetstormsecurity.com/files/163895/Microsoft-Exchange-ProxyShell-Remote-Code-Execution.html No Types Assigned



http://packetstormsecurity.com/files/163895/Microsoft-Exchange-ProxyShell-Remote-Code-Execution.html Exploit, Third Party Advisory, VDB Entry



Changed Reference Type

https://www.zerodayinitiative.com/advisories/ZDI-21-821/ Third Party Advisory



https://www.zerodayinitiative.com/advisories/ZDI-21-821/ Third Party Advisory, VDB Entry



CVE MODIFIED BY MICROSOFT CORPORATION 8/20/2021 2:15:07 PM

Action Type Old Value New Value Added Reference

http://packetstormsecurity.com/files/163895/Microsoft-Exchange-ProxyShell-Remote-Code-Execution.html [No Types Assigned]



INITIAL ANALYSIS 7/19/2021 11:35:37 AM

Action Type Old Value New Value Added CPE Configuration

OR
     *cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_23:*:*:*:*:*:*
     *cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_19:*:*:*:*:*:*
     *cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_20:*:*:*:*:*:*
     *cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_8:*:*:*:*:*:*
     *cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_9:*:*:*:*:*:*



Added CVSS V2

NIST (AV:N/AC:L/Au:N/C:C/I:C/A:C)



Added CVSS V3.1

NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H



Added CWE

NIST NVD-CWE-noinfo



Changed Reference Type

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34473 No Types Assigned



https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34473 Patch, Vendor Advisory



Changed Reference Type

https://www.zerodayinitiative.com/advisories/ZDI-21-821/ No Types Assigned



https://www.zerodayinitiative.com/advisories/ZDI-21-821/ Third Party Advisory



CVE MODIFIED BY MICROSOFT CORPORATION 7/19/2021 6:15:08 AM

Action Type Old Value New Value Added Reference

https://www.zerodayinitiative.com/advisories/ZDI-21-821/ [No Types Assigned]



QUICK INFO

CVE Dictionary Entry:
CVE-2021-34473
NVD Published Date:
07/14/2021
NVD Last Modified:
09/21/2021
Source:
Microsoft Corporation


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