#VU54709 Permissions, Privileges, and Access Controls in Microsoft Exchange Server


Published: 2021-07-13

Vulnerability identifier: #VU54709

Vulnerability risk: Low

CVSSv3.1: 7 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-33768

CWE-ID: CWE-264

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Microsoft Exchange Server
Server applications / Mail servers

Vendor: Microsoft

Description

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

The vulnerability exists due to application does not properly impose security restrictions in the Microsoft Exchange Server. A remote authenticated attacker on the local network can gain elevated privileges on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Microsoft Exchange Server: 2016 Cumulative Update 20 15.01.2242.004 - 2016 Cumulative Update 21 15.01.2308.008, 2019 Cumulative Update 9 15.02.0858.005 - 2019 Cumulative Update 10 15.02.0922.007


External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-33768


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.


Latest bulletins with this vulnerability