9.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
9 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:S/C:C/I:C/A:C
Aka ‘Microsoft Exchange Remote Code Execution Vulnerability’. This CVE ID is unique from CVE-2020-17117, CVE-2020-17141, CVE-2020-17142, CVE-2020-17144.
Recent assessments:
zeroSteiner at January 12, 2021 7:07pm UTC reported:
This is vulnerability is a bypass for the patch issued for CVE-2020-16875. The vulnerability was also identified and analyzed by Steven Seeley. The patch can be bypassed using call operators as described in Seeley’s blog Making Clouds Rain RCE in Office 365.
The original vulnerability is a command injection vulnerability that results in OS commands being executed with SYSTEM level privileges on the Exchange server due to insufficient sanitization on a cmdlet invocation.
Assessed Attacker Value: 5
Assessed Attacker Value: 5Assessed Attacker Value: 4
9.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
9 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:S/C:C/I:C/A:C