Microsoft Exchange Server Remote Code Execution Vulnerability
CVE-2023-21707

8.8HIGH

Key Information:

Vendor
Microsoft
Status
Microsoft Exchange Server 2016 Cumulative Update 23
Microsoft Exchange Server 2019 Cumulative Update 12
Microsoft Exchange Server 2019 Cumulative Update 11
Microsoft Exchange Server 2013 Cumulative Update 23
Vendor
CVE Published:
14 February 2023

Badges

👾 Exploit Exists🟡 Public PoC

Summary

A remote code execution vulnerability exists in Microsoft Exchange Server, which could allow an authenticated attacker to execute arbitrary code on the affected system. The flaw arises due to improper handling of requests. An attacker who successfully exploited this vulnerability could take control of the system and perform actions as an administrator. It is crucial for organizations to apply the relevant security updates and mitigate potential risks associated with this vulnerability.

Affected Version(s)

Microsoft Exchange Server 2013 Cumulative Update 23 x64-based Systems 15.00.0 < 15.00.1497.048

Microsoft Exchange Server 2016 Cumulative Update 23 x64-based Systems 15.01.0 < 15.01.2507.023

Microsoft Exchange Server 2019 Cumulative Update 11 x64-based Systems 15.02.0 < 15.02.0986.042

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2023-21707
Created by N1k0la-T

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisory

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.