Attacker Value
Unknown
(1 user assessed)
Exploitability
Unknown
(1 user assessed)
User Interaction
Required
Privileges Required
None
Attack Vector
Network
2

CVE-2021-31195

Disclosure Date: May 11, 2021
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

Microsoft Exchange Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-31198.

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1
Technical Analysis

PoC is publicly available https://blog.orange.tw/2021/08/proxyoracle-a-new-attack-surface-on-ms-exchange-part-2.html?m=1
Microsoft has already patched this vulnerabilities and exploitation has not been observed. However, threat actors could exploit these vulnerabilities by sending users an email to visit a malicious link and recover passwords in plaintext.

CVSS V3 Severity and Metrics
Base Score:
8.8 High
Impact Score:
5.9
Exploitability Score:
2.8
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
Required
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High

General Information

Vendors

  • Microsoft

Products

  • Microsoft Exchange Server 2016 Cumulative Update 19,
  • Microsoft Exchange Server 2019 Cumulative Update 8,
  • Microsoft Exchange Server 2019 Cumulative Update 9,
  • Microsoft Exchange Server 2016 Cumulative Update 20,
  • Microsoft Exchange Server 2013

Additional Info

Technical Analysis