SB2019010808 - Multiple vulnerabilities in Microsoft Exchange Server

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Information disclosure (CVE-ID: CVE-2019-0588)

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.

2) Memory corruption (CVE-ID: CVE-2019-0586)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to boundary error when processing email messages within Microsoft Exchange server. A remote unauthenticated attacker can send a specially crafted email, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0588
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0586