Vulnerability identifier: #VU16845

Vulnerability risk: Low

CVSSv3.1: 3.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-0588

CWE-ID: CWE-200

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Microsoft Exchange Server
Server applications / Mail servers

Vendor: Microsoft

Description

The vulnerability allows a remote attacker to obtain potentially sensitive information.

The vulnerability exists due to an error when the Microsoft Exchange PowerShell API grants calendar contributors more view permissions than intended. A remote attacker can gain access to potentially sensitive information.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Microsoft Exchange Server: 2013 Cumulative Update 21 15.00.1395.004, 2016 Cumulative Update 10 15.01.1531.003 - 2016 Cumulative Update 11 15.01.1591.010, 2019 RTM 15.02.0221.012, 2010 Service Pack 3 Update Rollup 25

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External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0588

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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