Vulnerability identifier: #VU21036

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-1233

CWE-ID: CWE-119

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 perform denial of service (DoS) attack.

The vulnerability exists due to a boundary in Microsoft Exchange Server. A remote attacker can send a specially crafted email to the affected server, trigger memory corruption and perform denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Microsoft Exchange Server: 2016 Cumulative Update 12 15.01.1713.005 - 2016 Cumulative Update 13 15.01.1779.002, 2019 Cumulative Update 1 15.02.0330.005 - 2019 Cumulative Update 2 15.02.0397.003

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External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1233

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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.