10

CVE-2021-34473

Warnung
Exploit

Microsoft Exchange Server Remote Code Execution Vulnerability

Microsoft Exchange Server Remote Code Execution Vulnerability
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Microsoft ≫ Exchange Server Version 2013 Update cumulative_update_23
Microsoft ≫ Exchange Server Version 2016 Update cumulative_update_19
Microsoft ≫ Exchange Server Version 2016 Update cumulative_update_20
Microsoft ≫ Exchange Server Version 2019 Update cumulative_update_8
Microsoft ≫ Exchange Server Version 2019 Update cumulative_update_9

03.11.2021: CISA Known Exploited Vulnerabilities (KEV) Catalog

Microsoft Exchange Server Remote Code Execution Vulnerability

Schwachstelle

Microsoft Exchange Server contains an unspecified vulnerability that allows for remote code execution.

Beschreibung

Apply updates per vendor instructions.

Erforderliche Maßnahmen
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 100% 1
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 10 10 10
AV:N/AC:L/Au:N/C:C/I:C/A:C
NIST 9.8 3.9 5.9
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Microsoft 9.1 3.9 5.2
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE-918 Server-Side Request Forgery (SSRF)

The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34473
Patch
Vendor Advisory
http://packetstormsecurity.com/files/163895/Microsoft-Exchange-ProxyShell-Remote-Code-Execution.html
Third Party Advisory
Exploit
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
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-34473
US Government Resource