QID 50114

Date Published: 2021-08-10

QID 50114: Microsoft Exchange Server Multiple Vulnerabilities (ProxyShell) (unauthenticated)

Microsoft Exchange Server is prone to multiple vulnerabilities including remote code and privilege escalation.

Microsoft released the following details and the security updates.
Affected Versions:
Microsoft Exchange Server 2013 Cumulative Update 23
Microsoft Exchange Server 2019 Cumulative Update 9
Microsoft Exchange Server 2019 Cumulative Update 10
Microsoft Exchange Server 2016 Cumulative Update 20
Microsoft Exchange Server 2016 Cumulative Update 21

QID Detection Logic (unauthenticated):

Successful exploitation allows attackers to execute remote code.

CVSS V3 rated as Critical - 9.8 severity.

CVSS V2 rated as Critical - 10 severity.

Solution

Customers are advised to refer to KB5004780, KB5004779, KB5004778 for information pertaining to this vulnerability.

Vendor References

CVE-2021-26855 - msrc.microsoft.com/update-guide/vulnerability/CVE-2021-31207
CVE-2021-34473 - msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34473
CVE-2021-34523 - msrc.microsoft.com/update-guide/vulnerability/CVE-2021-31207

CVEs related to QID 50114

CVE-2021-34473 | CVE-2021-34523 | CVE-2021-31207 |

Software Advisories

Advisory ID	Software	Component	Link
KB5004778			www.microsoft.com/download/details.aspx?familyid=cae731a5-0d00-4f76-b2c6-84bd511e529f
KB5004779			www.microsoft.com/download/details.aspx?familyid=ccf40c19-2653-4b5c-b922-d6d09bbf1c3e
KB5004780			www.microsoft.com/download/details.aspx?familyid=07683b40-1608-437d-a90a-eb2683cb3092

By selecting these links, you may be leaving CVEreport webspace. We have provided these links to other websites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other websites that are more appropriate for your purpose. CVEreport does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, CVEreport does not endorse any commercial products that may be mentioned on these sites. Please address comments about any linked pages to [email protected].