SB2020021147 - Privilege escalation in Microsoft Exchange Server

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Main Vulnerability Database SB2020021147

SB2020021147 - Privilege escalation in Microsoft Exchange Server

Published: February 11, 2020

Security Bulletin ID SB2020021147
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2020-0692)

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to uspecified error in Microsoft Exchange Server. Exploitation of this vulnerability requires Exchange Web Services (EWS) to be enabled and in use in an affected environment. A remote attacker can change parameters in the Security Access Token, forward it to a Microsoft Exchange Server and impersonate an another Exchange user. 


Remediation

Install update from vendor's website.

References